Merge remote-tracking branch 'upstream/master'

2021-01-04 22:02:33 -05:00 · 2021-01-04 22:02:33 -05:00 · ceb2a2ad11
commit ceb2a2ad11
parent 7f1fb0282c ebaef8828c
280 changed files with 66561 additions and 221 deletions
--- a/.DS_Store
+++ b/.DS_Store
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@ -0,0 +1,21 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ master ]
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    if: github.repository == 'Sakimori/matteo-the-prestige'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      - name: Push to Docker Hub
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          repository: blaseballsibr/matteo-the-prestige
+          tags: latest
--- a/9
+++ b/9
@ -0,0 +1,9 @@
+FROM python:3.8
+EXPOSE 5000
+
+WORKDIR /app
+
+COPY . ./
+RUN pip install -r requirements.txt
+
+CMD ["python", "the_prestige.py"]
--- a/README.md
+++ b/README.md
@ -11,35 +11,59 @@ This fork changes small things about the bot to better fit in in the FredChat di
 # matteo-the-prestige
 # simsim discord bot

-blaseball, blaseball, is back! in an unofficial capacity.
+blaseball, blaseball, is back! in an unofficial capacity. this project is completely unaffiliated with the game band.

-custom players, custom teams, custom leagues (that last one is coming soon™) all in discord! 
+we have custom players (generated by onomancer), custom teams, custom leagues (that last one is coming soon™), all set up in discord and watchable at https://simsim.sibr.dev! 

-we've also got things like custom team creation, easy setup for your teams to play against each other, and player idolization, all powered by this bot and onomancer.
+if you would like to add matteo to your server to be able to set up teams and games, you can do so with this link: https://discord.com/api/oauth2/authorize?client_id=789956166796574740&permissions=388160&scope=bot

 accepting pull requests, check the issues for to-dos.


 ## commands: (everything here is case sensitive, and can be prefixed with either m; or m!)
-
 ### team commands:
+
+#### creation and deletion:
 - m;saveteam
-  - saves a team to the database allowing it to be used for games. send this command at the top of a list, with entries separated by new lines (shift+enter in discord, or copy+paste from notepad).
-	- the first line of the list is your team's name (cannot contain emoji).
-	- the second line is your team's icon and slogan, this should begin with an emoji followed by a space, followed by a short slogan.
+  - saves a team to the database allowing it to be used for games. use this command at the top of a list with entries separated by new lines:
+	- the first line of the list is your team's name.
+	- the second line is the team's icon and slogan, generally this is an emoji followed by a space, followed by a short slogan.
+	- the third line must be blank.
 	- the next lines are your batters' names in the order you want them to appear in your lineup, lineups can contain any number of batters between 1 and 12.
-	- the final line is your pitcher's name.
-  - if you did it correctly, you'll get a team embed with a prompt to confirm. hit the 👍 and it'll be saved.
+	- then another blank line seperating your batters and your pitchers.
+	- the final lines are the names of the pitchers in your rotation, rotations can contain any number of pitchers between 1 and 8.
+  - if you did it correctly, you'll get a team embed with a prompt to confirm. hit the 👍 and your team will be saved!
+- m;deleteteam [teamname] (requires team ownership)
+  - allows you to delete the team with the provided name. you'll get an embed with a confirmation to prevent accidental deletions. hit the 👍 and your team will be deleted.
+- m;import
+  - imports an onomancer collection as a new team. you can use the new onomancer simsim setting to ensure compatibility. similarly to saveteam, you'll get a team embed with a prompt to confirm, hit the 👍 and your team will be saved!
+
+#### editing (all of these commands require ownership and exact spelling of the team name):
+- m;addplayer batter/pitcher [team name] [player name]
+  - adds a new player to the end of your team, either in the lineup or the rotation depending on which version you use. use addplayer batter or addplayer pitcher at the top of a list with entries separated by new lines:
+    - the name of the team you want to add the player to.
+	- the name of the player you want to add to the team.
+- m;moveplayer [team name] [player name] [new lineup/rotation position number]
+  - moves a player within your lineup or rotation. if you want to instead move a player from your rotation to your lineup or vice versa, use m;swapsection instead. use this command at the top of a list with entries separated by new lines:
+    - the name of the team you want to move the player on.
+	- the name of the player you want to move.
+	- the position you want to move them too, indexed with 1 being the first position of the lineup or rotation. all players below the specified position in the lineup or rotation will be pushed down.
+- m;swapsection [team name] [player name]
+  - swaps a player from your lineup to the end of your rotation or your rotation to the end of your lineup. use this command at the top of a list with entries separated by new lines:
+    - the name of the team you want to swap the player on.
+	- the name of the player you want to swap.
+- m;removeplayer [team name] [player name]	
+  - removes a player from your team. if there are multiple copies of the same player on a team this will only delete the first one. use this command at the top of a list with entries separated by new lines:
+	- the name of the team you want to remove the player from.
+	- the name of the player you want to remove.
+
+#### viewing and searching:  
 - m;showteam [name]
-  - shows information about any saved team.
- m;showallteams
-  - shows a paginated list of all teams available for games which can be scrolled through.	  
+  - shows the lineup, rotation, and slogan of any saved team in a discord embed with primary stat star ratings for all of the players. this command has fuzzy search so you don't need to type the full name of the team as long as you give enough to identify the team you're looking for.
 - m;searchteams [searchterm]
  - shows a paginated list of all teams whose names contain the given search term.
- m;deleteteam [teamname]
-  - allows you to delete the team with the provided name if you are the owner of it, gives a confirmation first to prevent accidental deletions. if it isn't letting you delete your team, you probably created it before teams having owners was a thing, contact xvi and xie can assign you as the owner.
- m;import
-  - imports an onomancer collection as a new team. you can use the new onomancer simsim setting to ensure compatibility.
+- m;showallteams
+  - shows a paginated list of all teams available for games which can be scrolled through.	
  
 ### player commands:	 
 - m;showplayer [name]
@ -47,18 +71,29 @@ accepting pull requests, check the issues for to-dos.
 - m;idolize [name]
  - records any name as your idol, mostly for fun.
 - m;showidol 
-  - displays your idol's name and stars.
+  - displays your idol's name and stars in a discord embed.
  
 ### game commands:
- m;startgame
-  - starts a game with premade teams made using saveteam, use this command at the top of a list followed by each of these in a new line:
+- m;startgame --day # or -d #
+  - starts a game with premade teams made using saveteam. provides a link to the website where you can watch the game. 
+  - the --day/-d is optional, if used it'll force the game to use the #th spot in each team's rotations. if this number is larger than the number of pitchers in one or both of the teams' rotations it'll wrap around. if it is not used pitchers will be chosen randomly from the teams' rotations.
+  - use this command at the top of a list with entries separated by new lines:
 	- the away team's name.
 	- the home team's name.
-	- and finally, optionally, the number of innings, which must be greater than 2 and less than 31. if not included it will default to 9.	  
+	- optionally, the number of innings, which must be greater than 2 and less than 31. if not included it will default to 9.
+  -	this command has fuzzy search so you don't need to type the full name of the team as long as you give enough to identify the team you're looking for.
+- m;randomgame
+  - starts a 9-inning game between 2 entirely random teams. embrace chaos!
+- m;starttournament --rounddelay #
+  - starts a randomly seeded tournament with up to 64 provided teams, automatically adding byes as necessary. all series have a 5 minute break between games. the current format is: best of 5 until the finals which are best of 7. 
+  - the --rounddelay is optional, if used, # must be between 1 and 120 and it'll set the delay between rounds to be # minutes. if not included it will default to 10.
+  - use this command at the top of a list with entries separated by new lines:
+    - the name of the tournament.
+	- the name of each participating team on its own line.

 ### other commands:
 - m;help [command]
-  - shows the instructions from here for given command. if no command is provided, it will instead provide a list of all of the commands that instructions can be provided for.    
+  - shows instructions for a given command. if no command is provided, it will instead provide a list of all of the commands that instructions can be provided for.    
 - m;credit
  - shows artist credit for matteo's avatar.  
 - m;roman [number]
@ -70,3 +105,4 @@ these folks are helping me a *ton* via patreon, and i cannot possibly thank them
 - Ale Humano
 - Chris Denmark
 - Astrid Bek
+- Kameleon
--- a/database.py
+++ b/database.py
@ -216,6 +216,21 @@ def save_team(name, team_json_string, user_id):
    except:
        return False

+def update_team(name, team_json_string):
+    conn = create_connection()
+    try:
+        if conn is not None:
+            c = conn.cursor()
+            store_string = "UPDATE teams SET team_json_string = ? WHERE name=?"
+            c.execute(store_string, (team_json_string, (re.sub('[^A-Za-z0-9 ]+', '', name)))) #this regex removes all non-standard characters
+            conn.commit() 
+            conn.close()
+            return True
+        conn.close()
+        return False
+    except:
+        return False
+
 def get_team(name, owner=False):
    conn = create_connection()
    if conn is not None:
--- a/games.py
+++ b/games.py
@ -115,45 +115,118 @@ class team(object):
        self.name = None
        self.lineup = []
        self.lineup_position = 0
+        self.rotation = []
        self.pitcher = None
        self.score = 0
        self.slogan = None

+    def find_player(self, name):
+        for index in range(0,len(self.lineup)):
+            if self.lineup[index].name == name:
+                return (self.lineup[index], index, self.lineup)
+        for index in range(0,len(self.rotation)):
+            if self.rotation[index].name == name:
+                return (self.rotation[index], index, self.rotation)
+        else:
+            return (None, None, None)
+
+    def average_stars(self):
+        total_stars = 0
+        for _player in self.lineup:
+            total_stars += _player.stlats["batting_stars"]
+        for _player in self.rotation:
+            total_stars += _player.stlats["pitching_stars"]
+        return total_stars/(len(self.lineup) + len(self.rotation))
+
+    def swap_player(self, name):
+        this_player, index, roster = self.find_player(name)
+        if this_player is not None and len(roster) > 1:
+            if roster == self.lineup:
+                if self.add_pitcher(this_player):
+                    roster.pop(index)
+                    return True
+            else:
+                if self.add_lineup(this_player)[0]:
+                    self.rotation.pop(index)
+                    return True
+        return False
+
+    def delete_player(self, name):
+        this_player, index, roster = self.find_player(name)
+        if this_player is not None and len(roster) > 1:
+            roster.pop(index)
+            return True
+        else:
+            return False
+
+    def slide_player(self, name, new_spot):
+        this_player, index, roster = self.find_player(name)
+        if this_player is not None and new_spot <= len(roster):
+            roster.pop(index)
+            roster.insert(new_spot-1, this_player)
+            return True
+        else:
+            return False
+
    def add_lineup(self, new_player):
-        if len(self.lineup) <= 12:
+        if len(self.lineup) < 20:
            self.lineup.append(new_player)
            return (True,)
        else:
-            return (False, "12 players in the lineup, maximum. We're being generous here.")
+            return (False, "20 players in the lineup, maximum. We're being really generous here.")

-    def set_pitcher(self, new_player):
-        self.pitcher = new_player
-        return (True,)
+    def add_pitcher(self, new_player):
+        if len(self.rotation) < 8:
+            self.rotation.append(new_player)
+            return True
+        else:
+            return False
+
+    def set_pitcher(self, rotation_slot = None, use_lineup = False):
+        temp_rotation = self.rotation.copy()
+        if use_lineup:
+            for batter in self.rotation:
+                temp_rotation.append(batter)
+        if rotation_slot is None:
+            self.pitcher = random.choice(temp_rotation)
+        else:
+            self.pitcher = temp_rotation[rotation_slot % len(temp_rotation)]

    def is_ready(self):
-        return (len(self.lineup) >= 1 and self.pitcher is not None)
+        try:
+            return (len(self.lineup) >= 1 and len(self.rotation) > 0)
+        except AttributeError:
+            self.rotation = [self.pitcher]
+            self.pitcher = None
+            return (len(self.lineup) >= 1 and len(self.rotation) > 0)

    def prepare_for_save(self):
        self.lineup_position = 0
        self.score = 0
+        if self.pitcher is not None and self.pitcher not in self.rotation:
+            self.rotation.append(self.pitcher)
+        self.pitcher = None
        for this_player in self.lineup:
            for stat in this_player.game_stats.keys():
                this_player.game_stats[stat] = 0
-        return True
+        for this_player in self.rotation:
+            for stat in this_player.game_stats.keys():
+                this_player.game_stats[stat] = 0
+        return self

    def finalize(self):
        if self.is_ready():
+            self.set_pitcher()
            while len(self.lineup) <= 4:
                self.lineup.append(random.choice(self.lineup))
-            return True
+            return self
        else:
            return False


 class game(object):

-    def __init__(self, name, team1, team2, length=None):
-        self.name = name
+    def __init__(self, team1, team2, length=None):
        self.over = False
        self.teams = {"away" : team1, "home" : team2}
        self.inning = 1
@ -162,6 +235,7 @@ class game(object):
        self.last_update = ({},0) #this is a ({outcome}, runs) tuple
        self.owner = None
        self.ready = False
+        self.victory_lap = False
        if length is not None:
            self.max_innings = length
        else:
@ -172,8 +246,13 @@ class game(object):
    def get_batter(self):
        if self.top_of_inning:
            bat_team = self.teams["away"]
+            counter = self.weather.counter_away
        else:
            bat_team = self.teams["home"]
+            counter = self.weather.counter_home
+
+        if self.weather.name == "Heavy Snow" and counter == bat_team.lineup_position:
+            return bat_team.pitcher
        return bat_team.lineup[bat_team.lineup_position % len(bat_team.lineup)]

    def get_pitcher(self):
@ -188,9 +267,12 @@ class game(object):
        batter = self.get_batter()

        if self.top_of_inning:
-            defender = random.choice(self.teams["home"].lineup)
+            defender_list = self.teams["home"].lineup.copy()
        else:
-            defender = random.choice(self.teams["away"].lineup)
+            defender_list = self.teams["away"].lineup.copy()
+
+        defender_list.append(pitcher)
+        defender = random.choice(defender_list) #make pitchers field

        outcome["batter"] = batter
        outcome["defender"] = ""
@ -502,14 +584,26 @@ class game(object):
    def batterup(self):
        scores_to_add = 0
        result = self.at_bat()
-        self.get_batter()
        if self.top_of_inning:
            offense_team = self.teams["away"]
+            weather_count = self.weather.counter_away
            defense_team = self.teams["home"]
        else:
            offense_team = self.teams["home"]
+            weather_count = self.weather.counter_home
            defense_team = self.teams["away"]

+        if self.weather.name == "Slight Tailwind" and "mulligan" not in self.last_update[0].keys() and not result["ishit"] and result["text"] != appearance_outcomes.walk:
+            mulligan_roll_target = -((((self.get_batter().stlats["batting_stars"])-7)/7)**2)+1
+            if random.random() > mulligan_roll_target:
+                result["mulligan"] = True
+                return (result, 0)
+
+        if self.weather.name == "Heavy Snow" and weather_count == offense_team.lineup_position and "snow_atbat" not in self.last_update[0].keys():
+            result["snow_atbat"] = True
+            result["text"] = f"{offense_team.lineup[offense_team.lineup_position % len(offense_team.lineup)].name}'s hands are too cold! {self.get_batter().name} is forced to bat!"
+            return (result, 0)
+
        defenders = defense_team.lineup.copy()
        defenders.append(defense_team.pitcher)
        defender = random.choice(defenders) #pitcher can field outs now :3
@ -599,12 +693,21 @@ class game(object):
        for base in self.bases.keys():
            self.bases[base] = None
        self.outs = 0
+        if self.top_of_inning and self.weather.name == "Heavy Snow" and self.weather.counter_away < self.teams["away"].lineup_position:
+            self.weather.counter_away = self.pitcher_insert(self.teams["away"])
+
        if not self.top_of_inning:
+            if self.weather.name == "Heavy Snow" and self.weather.counter_home < self.teams["home"].lineup_position:
+                self.weather.counter_home = self.pitcher_insert(self.teams["home"])
            self.inning += 1
            if self.inning > self.max_innings and self.teams["home"].score != self.teams["away"].score: #game over
                self.over = True
        self.top_of_inning = not self.top_of_inning

+    def pitcher_insert(self, this_team):
+        rounds = math.ceil(this_team.lineup_position / len(this_team.lineup))
+        position = random.randint(0, len(this_team.lineup)-1)
+        return rounds * len(this_team.lineup) + position

    def end_of_game_report(self):
        return {
@ -614,6 +717,16 @@ class game(object):
                "home_pitcher" : self.teams["home"].pitcher
            }

+    def named_bases(self):
+        name_bases = {}
+        for base in range(1,4):
+            if self.bases[base] is not None:
+                name_bases[base] = self.bases[base].name
+            else:
+                name_bases[base] = None
+
+        return name_bases
+

    def gamestate_update_full(self):
        attempts = self.thievery_attempts()
@ -637,19 +750,9 @@ class game(object):
                    else:
                        inningtext = "bottom"

-                    updatestring = f"{self.last_update[0]['batter']} {self.last_update[0]['text'].value} {self.last_update[0]['defender']}{punc}\n"
+                    updatestring = "this isn't used but i don't want to break anything"

-                    if self.last_update[1] > 0:
-                        updatestring += f"{self.last_update[1]} runs scored!"
-
-                    return f"""Last update: {updatestring}
-
-        Score: {self.teams['away'].score} - {self.teams['home'].score}.
-        Current inning: {inningtext} of {self.inning}. {self.outs} outs.
-        Pitcher: {self.get_pitcher().name}
-        Batter: {self.get_batter().name}
-        Bases: 3: {str(self.bases[3])} 2: {str(self.bases[2])} 1: {str(self.bases[1])}
-        """
+                    return "this isn't used but i don't want to break anything"
                else:
                    return f"""Game over! Final score: **{self.teams['away'].score} - {self.teams['home'].score}**
        Last update: {self.last_update[0]['batter']} {self.last_update[0]['text'].value} {self.last_update[0]['defender']}{punc}"""
@ -689,20 +792,40 @@ def get_team(name):
    try:
        team_json = jsonpickle.decode(db.get_team(name)[0], keys=True, classes=team)
        if team_json is not None:
+            if team_json.pitcher is not None: #detects old-format teams, adds pitcher
+                team_json.rotation.append(team_json.pitcher)
+                team_json.pitcher = None
+                update_team(team_json)
            return team_json
        return None
+    except AttributeError:
+        team_json.rotation = []
+        team_json.rotation.append(team_json.pitcher)
+        team_json.pitcher = None
+        update_team(team_json)
+        return team_json
    except:
        return None

 def get_team_and_owner(name):
-    #try:
-    counter, name, team_json_string, timestamp, owner_id = db.get_team(name, owner=True)
-    team_json = jsonpickle.decode(team_json_string, keys=True, classes=team)
-    if team_json is not None:
+    try:
+        counter, name, team_json_string, timestamp, owner_id = db.get_team(name, owner=True)
+        team_json = jsonpickle.decode(team_json_string, keys=True, classes=team)
+        if team_json is not None:
+            if team_json.pitcher is not None: #detects old-format teams, adds pitcher
+                team_json.rotation.append(team_json.pitcher)
+                team_json.pitcher = None
+                update_team(team_json)
+            return (team_json, owner_id)
+        return None
+    except AttributeError:
+        team_json.rotation = []
+        team_json.rotation.append(team_json.pitcher)
+        team_json.pitcher = None
+        update_team(team_json)
        return (team_json, owner_id)
-    return None
-    #except:
-        #return None
+    except:
+        return None

 def save_team(this_team, user_id):
    try:
@ -713,6 +836,15 @@ def save_team(this_team, user_id):
    except:
        return None

+def update_team(this_team):
+    try:
+        this_team.prepare_for_save()
+        team_json_string = jsonpickle.encode(this_team, keys=True)
+        db.update_team(this_team.name, team_json_string)
+        return True
+    except:
+        return None
+
 def get_all_teams():
    teams = []
    for team_pickle in db.get_all_teams():
@ -733,8 +865,22 @@ def get_history():
 def search_team(search_term):
    teams = []
    for team_pickle in db.search_teams(search_term):
-        this_team = jsonpickle.decode(team_pickle[0], keys=True, classes=team)
-        teams.append(this_team)
+        team_json = jsonpickle.decode(team_pickle[0], keys=True, classes=team)
+        try:
+            if team_json.pitcher is not None:
+                if len(team_json.rotation) == 0: #detects old-format teams, adds pitcher
+                    team_json.rotation.append(team_json.pitcher)
+                    team_json.pitcher = None
+                    update_team(team_json)
+        except AttributeError:
+            team_json.rotation = []
+            team_json.rotation.append(team_json.pitcher)
+            team_json.pitcher = None
+            update_team(team_json)
+        except:
+            return None
+
+        teams.append(team_json)
    return teams

 def base_string(base):
@ -754,6 +900,8 @@ class weather(object):
    def __init__(self, new_name, new_emoji):
        self.name = new_name
        self.emoji = new_emoji
+        self.counter_away = 0
+        self.counter_home = 0

    def __str__(self):
        return f"{self.emoji} {self.name}"
--- a/leagues.py
+++ b/leagues.py
@ -0,0 +1,127 @@
+import time, asyncio, jsonpickle, random, math
+from games import team, game
+from discord import Embed, Color
+import database as db
+
+
+
+
+
+class league(object):
+    def __init__(self, name, subleagues_dic):
+        self.subleagues = {} #key: name, value: [divisions]
+        self.max_days
+        self.day = 1
+        self.name = name
+        self.subleagues = subleagues_dic
+
+class division(object):
+    def __init__(self):
+        self.teams = {} #key: team object, value: {wins; rd (run diff)}
+
+class tournament(object):
+    def __init__(self, name, team_dic, series_length = 5, finals_series_length = 7, max_innings = 9, id = None, secs_between_games = 300, secs_between_rounds = 600): 
+        self.name = name
+        self.teams = team_dic #same format as division, wins/losses will be used for seeding later
+        self.bracket = None
+        self.results = None
+        self.series_length = series_length
+        self.finals_length = finals_series_length
+        self.game_length = max_innings
+        self.active = False
+        self.delay = secs_between_games
+        self.round_delay = secs_between_rounds
+        self.finals = False
+        self.id = id
+
+        if id is None:
+            self.id = random.randint(1111,9999)
+        else:
+            self.id = id
+
+
+    def build_bracket(self, random_sort = False, by_wins = False):
+        teams_list = list(self.teams.keys()).copy()
+
+        if random_sort:
+            def sorter(team_in_list):
+                return random.random()
+
+        elif by_wins:
+            def sorter(team_in_list):
+                return self.teams[team_in_list]["wins"] #sorts by wins
+
+        else: #sort by average stars
+            def sorter(team_in_list):
+                return team_in_list.average_stars()
+
+        teams_list.sort(key=sorter, reverse=True)
+        
+
+        bracket_layers = int(math.ceil(math.log(len(teams_list), 2)))
+        empty_slots = int(math.pow(2, bracket_layers) - len(teams_list))
+
+        for i in range(0, empty_slots):
+            teams_list.append(None)
+
+        previous_bracket_layer = teams_list.copy()
+        for i in range(0, bracket_layers - 1):
+            this_layer = []
+            for pair in range(0, int(len(previous_bracket_layer)/2)):
+                if pair % 2 == 0: #if even number
+                    this_layer.insert(0+int(pair/2), [previous_bracket_layer.pop(0), previous_bracket_layer.pop(-1)]) #every other pair goes at front of list, moving forward
+                else:
+                    this_layer.insert(0-int((1+pair)/2), [previous_bracket_layer.pop(int(len(previous_bracket_layer)/2)-1), previous_bracket_layer.pop(int(len(previous_bracket_layer)/2))]) #every other pair goes at end of list, moving backward
+            previous_bracket_layer = this_layer
+        self.bracket = bracket(previous_bracket_layer, bracket_layers)
+
+    def round_check(self):
+        if self.bracket.depth == 1:
+            self.finals = True
+            return True
+        else:
+            return False
+
+class bracket(object):
+    this_bracket = []
+
+    def __init__(self, bracket_list, depth):
+        self.this_bracket = bracket_list
+        self.depth = depth
+        self.bottom_row = []
+
+    def get_bottom_row(self):
+        self.depth = 1
+        self.bottom_row = []
+        self.dive(self.this_bracket)
+        return self.bottom_row
+
+    def dive(self, branch):
+        if not isinstance(branch[0], list): #if it's a pair of games
+            self.bottom_row.append(branch)
+        else:
+            self.depth += 1
+            return self.dive(branch[0]), self.dive(branch[1])
+
+    #def set_winners(self, branch, winners_list):
+        #new_bracket = 
+
+    def set_winners_dive(self, winners_list, index = 0, branch = None, parent = None):
+        if branch is None:
+            branch = self.this_bracket.copy()
+        if not isinstance(branch[0], list): #if it's a pair of games
+            if branch[0].name in winners_list or branch[1] is None:
+                winner = branch[0]
+                if parent is not None:
+                    parent[index] = winner
+            elif branch[1].name in winners_list:
+                winner = branch[1]
+                if parent is not None:
+                    parent[index] = winner        
+        else:
+            self.set_winners_dive(winners_list, index = 0, branch = branch[0], parent = branch)
+            self.set_winners_dive(winners_list, index = 1, branch = branch[1], parent = branch)
+
+        if parent is None:
+            self.this_bracket = branch
+            return branch
--- a/main_controller.py
+++ b/main_controller.py
@ -0,0 +1,156 @@
+import asyncio, time, datetime, games, json, threading, jinja2, leagues
+from flask import Flask, url_for, Response, render_template, request, jsonify
+from flask_socketio import SocketIO, emit
+
+app = Flask("the-prestige")
+app.config['SECRET KEY'] = 'dev'
+#app.config['SERVER_NAME'] = '0.0.0.0:5000'
+socketio = SocketIO(app)
+
+@app.route('/')
+def index():
+    if ('league' in request.args):
+        return render_template("index.html", league=request.args['league'])
+    return render_template("index.html")
+
+@app.route('/game')
+def game_page():
+    return render_template("game.html")
+
+
+thread2 = threading.Thread(target=socketio.run,args=(app,'0.0.0.0'))
+thread2.start()
+
+master_games_dic = {} #key timestamp : (game game, {} state)
+data_to_send = []
+
+@socketio.on("recieved")
+def handle_new_conn(data):
+    socketio.emit("states_update", data_to_send, room=request.sid)
+
+def update_loop():
+    while True:
+        game_states = {}
+        game_times = iter(master_games_dic.copy().keys())
+        for game_time in game_times:
+            this_game, state, discrim_string = master_games_dic[game_time]
+            test_string = this_game.gamestate_display_full()
+            state["leagueoruser"] = discrim_string
+            state["display_inning"] = this_game.inning          #games need to be initialized with the following keys in state:
+                                                                #is_league, bool
+            state["outs"] = this_game.outs                      #away_name
+            state["pitcher"] = this_game.get_pitcher().name     #home_name
+            state["batter"] = this_game.get_batter().name       #max_innings
+            state["away_score"] = this_game.teams["away"].score #top_of_inning = True
+            state["home_score"] = this_game.teams["home"].score #update_pause = 0
+                                                                #victory_lap = False
+            if test_string == "Game not started.":              #weather_emoji
+                state["update_emoji"] = "🍿"                    #weather_text
+                state["update_text"] = "Play blall!"            #they also need a timestamp
+                state["start_delay"] -= 1
+            
+            state["display_top_of_inning"] = state["top_of_inning"]
+
+            if state["start_delay"] <= 0:
+                if this_game.top_of_inning != state["top_of_inning"]:
+                    state["update_pause"] = 2
+                    state["pitcher"] = "-"
+                    state["batter"] = "-"
+                    if not state["top_of_inning"]:
+                        state["display_inning"] -= 1
+                        state["display_top_of_inning"] = False
+
+                if state["update_pause"] == 1:
+                    state["update_emoji"] = "🍿"
+                    if this_game.over:
+                        state["display_inning"] -= 1
+                        state["display_top_of_inning"] = False
+                        winning_team = this_game.teams['home'].name if this_game.teams['home'].score > this_game.teams['away'].score else this_game.teams['away'].name
+                        if this_game.victory_lap and winning_team == this_game.teams['home'].name:
+                            state["update_text"] = f"{winning_team} wins with a victory lap!"
+                        elif winning_team == this_game.teams['home'].name:
+                            state["update_text"] = f"{winning_team} wins, shaming {this_game.teams['away'].name}!"
+                        else:
+                            state["update_text"] = f"{winning_team} wins!"
+                        state["pitcher"] = "-"
+                        state["batter"] = "-"
+                    elif this_game.top_of_inning:
+                        state["update_text"] = f"Top of {this_game.inning}. {this_game.teams['away'].name} batting!"
+                    else:
+                        if this_game.inning >= this_game.max_innings:
+                            if this_game.teams["home"].score > this_game.teams["away"].score:
+                                this_game.victory_lap = True
+                        state["update_text"] = f"Bottom of {this_game.inning}. {this_game.teams['home'].name} batting!"
+
+                elif state["update_pause"] != 1 and test_string != "Game not started.":
+                    if "steals" in this_game.last_update[0].keys():
+                        updatestring = ""
+                        for attempt in this_game.last_update[0]["steals"]:
+                            updatestring += attempt + "\n"
+
+                        state["update_emoji"] = "💎" 
+                        state["update_text"] = updatestring
+
+                    elif "mulligan" in this_game.last_update[0].keys():
+                        updatestring = ""
+                        punc = ""
+                        if this_game.last_update[0]["defender"] != "":
+                            punc = ", "
+
+                        state["update_emoji"] = "🏌️‍♀️"
+                        state["update_text"] = f"{this_game.last_update[0]['batter']} would have gone out, but they took a mulligan!"
+
+                    elif "snow_atbat" in this_game.last_update[0].keys():
+                        state["update_emoji"] = "❄"
+                        state["update_text"] = this_game.last_update[0]["text"]
+
+                    else:
+                        updatestring = ""
+                        punc = ""
+                        if this_game.last_update[0]["defender"] != "":
+                            punc = ". "
+
+                        if "fc_out" in this_game.last_update[0].keys():
+                            name, base_string = this_game.last_update[0]['fc_out']
+                            updatestring = f"{this_game.last_update[0]['batter']} {this_game.last_update[0]['text'].value.format(name, base_string)} {this_game.last_update[0]['defender']}{punc}"
+                        else:
+                            updatestring = f"{this_game.last_update[0]['batter']} {this_game.last_update[0]['text'].value} {this_game.last_update[0]['defender']}{punc}"
+                        if this_game.last_update[1] > 0:
+                                updatestring += f"{this_game.last_update[1]} runs scored!"
+
+                        state["update_emoji"] = "🏏"
+                        state["update_text"] = updatestring
+
+            state["bases"] = this_game.named_bases()
+
+            state["top_of_inning"] = this_game.top_of_inning 
+
+            game_states[game_time] = state
+
+            if state["update_pause"] <= 1 and state["start_delay"] < 0:
+                if this_game.over:
+                    state["update_pause"] = 2
+                    if state["end_delay"] < 0:
+                        master_games_dic.pop(game_time)
+                    else:
+                        state["end_delay"] -= 1
+                        master_games_dic[game_time][1]["end_delay"] -= 1
+                else:
+                    this_game.gamestate_update_full()
+
+            state["update_pause"] -= 1
+
+        global data_to_send
+        data_to_send = []
+        template = jinja2.Environment(loader=jinja2.FileSystemLoader('templates')).get_template('game_box.html')
+        
+        for timestamp in game_states:
+            data_to_send.append({
+                'timestamp' : timestamp,
+                'league' : game_states[timestamp]['leagueoruser'] if game_states[timestamp]['is_league'] else '',
+                'state' : game_states[timestamp],
+                'html' : template.render(state=game_states[timestamp], timestamp=timestamp)
+            })
+
+        socketio.emit("states_update", data_to_send)
+        time.sleep(8)
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/LICENSE.rst
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/LICENSE.rst
@ -0,0 +1,28 @@
+Copyright 2010 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/METADATA
@ -0,0 +1,137 @@
+Metadata-Version: 2.1
+Name: Flask
+Version: 1.1.2
+Summary: A simple framework for building complex web applications.
+Home-page: https://palletsprojects.com/p/flask/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://flask.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/flask
+Project-URL: Issue tracker, https://github.com/pallets/flask/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Framework :: Flask
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Application
+Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Requires-Dist: Werkzeug (>=0.15)
+Requires-Dist: Jinja2 (>=2.10.1)
+Requires-Dist: itsdangerous (>=0.24)
+Requires-Dist: click (>=5.1)
+Provides-Extra: dev
+Requires-Dist: pytest ; extra == 'dev'
+Requires-Dist: coverage ; extra == 'dev'
+Requires-Dist: tox ; extra == 'dev'
+Requires-Dist: sphinx ; extra == 'dev'
+Requires-Dist: pallets-sphinx-themes ; extra == 'dev'
+Requires-Dist: sphinxcontrib-log-cabinet ; extra == 'dev'
+Requires-Dist: sphinx-issues ; extra == 'dev'
+Provides-Extra: docs
+Requires-Dist: sphinx ; extra == 'docs'
+Requires-Dist: pallets-sphinx-themes ; extra == 'docs'
+Requires-Dist: sphinxcontrib-log-cabinet ; extra == 'docs'
+Requires-Dist: sphinx-issues ; extra == 'docs'
+Provides-Extra: dotenv
+Requires-Dist: python-dotenv ; extra == 'dotenv'
+
+Flask
+=====
+
+Flask is a lightweight `WSGI`_ web application framework. It is designed
+to make getting started quick and easy, with the ability to scale up to
+complex applications. It began as a simple wrapper around `Werkzeug`_
+and `Jinja`_ and has become one of the most popular Python web
+application frameworks.
+
+Flask offers suggestions, but doesn't enforce any dependencies or
+project layout. It is up to the developer to choose the tools and
+libraries they want to use. There are many extensions provided by the
+community that make adding new functionality easy.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U Flask
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    from flask import Flask
+
+    app = Flask(__name__)
+
+    @app.route("/")
+    def hello():
+        return "Hello, World!"
+
+.. code-block:: text
+
+    $ env FLASK_APP=hello.py flask run
+     * Serving Flask app "hello"
+     * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
+
+
+Contributing
+------------
+
+For guidance on setting up a development environment and how to make a
+contribution to Flask, see the `contributing guidelines`_.
+
+.. _contributing guidelines: https://github.com/pallets/flask/blob/master/CONTRIBUTING.rst
+
+
+Donate
+------
+
+The Pallets organization develops and supports Flask and the libraries
+it uses. In order to grow the community of contributors and users, and
+allow the maintainers to devote more time to the projects, `please
+donate today`_.
+
+.. _please donate today: https://psfmember.org/civicrm/contribute/transact?reset=1&id=20
+
+
+Links
+-----
+
+* Website: https://palletsprojects.com/p/flask/
+* Documentation: https://flask.palletsprojects.com/
+* Releases: https://pypi.org/project/Flask/
+* Code: https://github.com/pallets/flask
+* Issue tracker: https://github.com/pallets/flask/issues
+* Test status: https://dev.azure.com/pallets/flask/_build
+* Official chat: https://discord.gg/t6rrQZH
+
+.. _WSGI: https://wsgi.readthedocs.io
+.. _Werkzeug: https://www.palletsprojects.com/p/werkzeug/
+.. _Jinja: https://www.palletsprojects.com/p/jinja/
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/RECORD
@ -0,0 +1,49 @@
+../../Scripts/flask.exe,sha256=KiH4h59NIDb6Al7dChbDgRnZM3G0HVlQ8Og8S6W1VGE,97149
+Flask-1.1.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+Flask-1.1.2.dist-info/LICENSE.rst,sha256=SJqOEQhQntmKN7uYPhHg9-HTHwvY-Zp5yESOf_N9B-o,1475
+Flask-1.1.2.dist-info/METADATA,sha256=3INpPWH6nKfZ33R2N-bQZy4TOe1wQCMweZc9mwcNrtc,4591
+Flask-1.1.2.dist-info/RECORD,,
+Flask-1.1.2.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+Flask-1.1.2.dist-info/WHEEL,sha256=8zNYZbwQSXoB9IfXOjPfeNwvAsALAjffgk27FqvCWbo,110
+Flask-1.1.2.dist-info/entry_points.txt,sha256=gBLA1aKg0OYR8AhbAfg8lnburHtKcgJLDU52BBctN0k,42
+Flask-1.1.2.dist-info/top_level.txt,sha256=dvi65F6AeGWVU0TBpYiC04yM60-FX1gJFkK31IKQr5c,6
+flask/__init__.py,sha256=YnA9wkwbJcnb_jTT-nMsMFeFE_UWt33khKzdHmMSuyI,1894
+flask/__main__.py,sha256=fjVtt3QTANXlpJCOv3Ha7d5H-76MwzSIOab7SFD9TEk,254
+flask/__pycache__/__init__.cpython-38.pyc,,
+flask/__pycache__/__main__.cpython-38.pyc,,
+flask/__pycache__/_compat.cpython-38.pyc,,
+flask/__pycache__/app.cpython-38.pyc,,
+flask/__pycache__/blueprints.cpython-38.pyc,,
+flask/__pycache__/cli.cpython-38.pyc,,
+flask/__pycache__/config.cpython-38.pyc,,
+flask/__pycache__/ctx.cpython-38.pyc,,
+flask/__pycache__/debughelpers.cpython-38.pyc,,
+flask/__pycache__/globals.cpython-38.pyc,,
+flask/__pycache__/helpers.cpython-38.pyc,,
+flask/__pycache__/logging.cpython-38.pyc,,
+flask/__pycache__/sessions.cpython-38.pyc,,
+flask/__pycache__/signals.cpython-38.pyc,,
+flask/__pycache__/templating.cpython-38.pyc,,
+flask/__pycache__/testing.cpython-38.pyc,,
+flask/__pycache__/views.cpython-38.pyc,,
+flask/__pycache__/wrappers.cpython-38.pyc,,
+flask/_compat.py,sha256=8KPT54Iig96TuLipdogLRHNYToIcg-xPhnSV5VRERnw,4099
+flask/app.py,sha256=tmEhx_XrIRP24vZg39dHMWFzJ2jj-YxIcd51LaIT5cE,98059
+flask/blueprints.py,sha256=vkdm8NusGsfZUeIfPdCluj733QFmiQcT4Sk1tuZLUjw,21400
+flask/cli.py,sha256=SIb22uq9wYBeB2tKMl0pYdhtZ1MAQyZtPL-3m6es4G0,31035
+flask/config.py,sha256=3dejvQRYfNHw_V7dCLMxU8UNFpL34xIKemN7gHZIZ8Y,10052
+flask/ctx.py,sha256=cks-omGedkxawHFo6bKIrdOHsJCAgg1i_NWw_htxb5U,16724
+flask/debughelpers.py,sha256=-whvPKuAoU8AZ9c1z_INuOeBgfYDqE1J2xNBsoriugU,6475
+flask/globals.py,sha256=OgcHb6_NCyX6-TldciOdKcyj4PNfyQwClxdMhvov6aA,1637
+flask/helpers.py,sha256=IHa578HU_3XAAo1wpXQv24MYRYO5TzaiDQQwvUIcE6Q,43074
+flask/json/__init__.py,sha256=6nITbZYiYOPB8Qfi1-dvsblwn01KRz8VOsMBIZyaYek,11988
+flask/json/__pycache__/__init__.cpython-38.pyc,,
+flask/json/__pycache__/tag.cpython-38.pyc,,
+flask/json/tag.py,sha256=vq9GOllg_0kTWKuVFrwmkeOQzR-jdBD23x-89JyCCQI,8306
+flask/logging.py,sha256=WcY5UkqTysGfmosyygSlXyZYGwOp3y-VsE6ehoJ48dk,3250
+flask/sessions.py,sha256=G0KsEkr_i1LG_wOINwFSOW3ts7Xbv4bNgEZKc7TRloc,14360
+flask/signals.py,sha256=yYLOed2x8WnQ7pirGalQYfpYpCILJ0LJhmNSrnWvjqw,2212
+flask/templating.py,sha256=F8E_IZXn9BGsjMzUJ5N_ACMyZdiFBp_SSEaUunvfZ7g,4939
+flask/testing.py,sha256=WXsciCQbHBP7xjHqNvOA4bT0k86GvSNpgzncfXLDEEg,10146
+flask/views.py,sha256=eeWnadLAj0QdQPLtjKipDetRZyG62CT2y7fNOFDJz0g,5802
+flask/wrappers.py,sha256=kgsvtZuMM6RQaDqhRbc5Pcj9vqTnaERl2pmXcdGL7LU,4736
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/REQUESTED
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/REQUESTED
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/WHEEL
@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.6)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/entry_points.txt
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/entry_points.txt
@ -0,0 +1,3 @@
+[console_scripts]
+flask = flask.cli:main
+
--- a/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/top_level.txt
@ -0,0 +1 @@
+flask
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/LICENSE
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/LICENSE
@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Miguel Grinberg
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/METADATA
@ -0,0 +1,27 @@
+Metadata-Version: 2.1
+Name: Flask-SocketIO
+Version: 5.0.1
+Summary: Socket.IO integration for Flask applications
+Home-page: http://github.com/miguelgrinberg/Flask-SocketIO/
+Author: Miguel Grinberg
+Author-email: miguelgrinberg50@gmail.com
+License: MIT
+Platform: any
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Dist: Flask (>=0.9)
+Requires-Dist: python-socketio (>=5.0.2)
+
+
+Flask-SocketIO
+--------------
+
+Socket.IO integration for Flask applications.
+
+
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/RECORD
@ -0,0 +1,13 @@
+Flask_SocketIO-5.0.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+Flask_SocketIO-5.0.1.dist-info/LICENSE,sha256=aNCWbkgKjS_T1cJtACyZbvCM36KxWnfQ0LWTuavuYKQ,1082
+Flask_SocketIO-5.0.1.dist-info/METADATA,sha256=ZGkOXFiwpUToh06H483U7XKXKi7tybYhE9ajnguMpFE,825
+Flask_SocketIO-5.0.1.dist-info/RECORD,,
+Flask_SocketIO-5.0.1.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+Flask_SocketIO-5.0.1.dist-info/WHEEL,sha256=Z-nyYpwrcSqxfdux5Mbn_DQ525iP7J2DG3JgGvOYyTQ,110
+Flask_SocketIO-5.0.1.dist-info/top_level.txt,sha256=C1ugzQBJ3HHUJsWGzyt70XRVOX-y4CUAR8MWKjwJOQ8,15
+flask_socketio/__init__.py,sha256=hy8Sh1yu3zsZF3QUC0_U4VNsBumswPBAWoqNOlgA8wk,47464
+flask_socketio/__pycache__/__init__.cpython-38.pyc,,
+flask_socketio/__pycache__/namespace.cpython-38.pyc,,
+flask_socketio/__pycache__/test_client.cpython-38.pyc,,
+flask_socketio/namespace.py,sha256=mt8S3u-Iwn-wHaV0QwVMMItOQZtc-A2bxMnlwQHLuxw,2019
+flask_socketio/test_client.py,sha256=YW7mz4jO3XZAg1Xg_QDy4va233oyYO9Uo9JHJ0v2FCA,10269
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/REQUESTED
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/REQUESTED
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/WHEEL
@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.36.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
--- a/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/top_level.txt
@ -0,0 +1 @@
+flask_socketio
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/LICENSE.rst
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/LICENSE.rst
@ -0,0 +1,28 @@
+Copyright 2007 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/METADATA
@ -0,0 +1,106 @@
+Metadata-Version: 2.1
+Name: Jinja2
+Version: 2.11.2
+Summary: A very fast and expressive template engine.
+Home-page: https://palletsprojects.com/p/jinja/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://jinja.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/jinja
+Project-URL: Issue tracker, https://github.com/pallets/jinja/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: Text Processing :: Markup :: HTML
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Description-Content-Type: text/x-rst
+Requires-Dist: MarkupSafe (>=0.23)
+Provides-Extra: i18n
+Requires-Dist: Babel (>=0.8) ; extra == 'i18n'
+
+Jinja
+=====
+
+Jinja is a fast, expressive, extensible templating engine. Special
+placeholders in the template allow writing code similar to Python
+syntax. Then the template is passed data to render the final document.
+
+It includes:
+
+-   Template inheritance and inclusion.
+-   Define and import macros within templates.
+-   HTML templates can use autoescaping to prevent XSS from untrusted
+    user input.
+-   A sandboxed environment can safely render untrusted templates.
+-   AsyncIO support for generating templates and calling async
+    functions.
+-   I18N support with Babel.
+-   Templates are compiled to optimized Python code just-in-time and
+    cached, or can be compiled ahead-of-time.
+-   Exceptions point to the correct line in templates to make debugging
+    easier.
+-   Extensible filters, tests, functions, and even syntax.
+
+Jinja's philosophy is that while application logic belongs in Python if
+possible, it shouldn't make the template designer's job difficult by
+restricting functionality too much.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    $ pip install -U Jinja2
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+In A Nutshell
+-------------
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+    {% block title %}Members{% endblock %}
+    {% block content %}
+      <ul>
+      {% for user in users %}
+        <li><a href="{{ user.url }}">{{ user.username }}</a></li>
+      {% endfor %}
+      </ul>
+    {% endblock %}
+
+
+Links
+-----
+
+-   Website: https://palletsprojects.com/p/jinja/
+-   Documentation: https://jinja.palletsprojects.com/
+-   Releases: https://pypi.org/project/Jinja2/
+-   Code: https://github.com/pallets/jinja
+-   Issue tracker: https://github.com/pallets/jinja/issues
+-   Test status: https://dev.azure.com/pallets/jinja/_build
+-   Official chat: https://discord.gg/t6rrQZH
+
+
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/RECORD
@ -0,0 +1,61 @@
+Jinja2-2.11.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+Jinja2-2.11.2.dist-info/LICENSE.rst,sha256=O0nc7kEF6ze6wQ-vG-JgQI_oXSUrjp3y4JefweCUQ3s,1475
+Jinja2-2.11.2.dist-info/METADATA,sha256=5ZHRZoIRAMHsJPnqhlJ622_dRPsYePYJ-9EH4-Ry7yI,3535
+Jinja2-2.11.2.dist-info/RECORD,,
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+Jinja2-2.11.2.dist-info/entry_points.txt,sha256=Qy_DkVo6Xj_zzOtmErrATe8lHZhOqdjpt3e4JJAGyi8,61
+Jinja2-2.11.2.dist-info/top_level.txt,sha256=PkeVWtLb3-CqjWi1fO29OCbj55EhX_chhKrCdrVe_zs,7
+jinja2/__init__.py,sha256=0QCM_jKKDM10yzSdHRVV4mQbCbDqf0GN0GirAqibn9Y,1549
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+jinja2/visitor.py,sha256=DUHupl0a4PGp7nxRtZFttUzAi1ccxzqc2hzetPYUz8U,3240
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/WHEEL
@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/entry_points.txt
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/entry_points.txt
@ -0,0 +1,3 @@
+[babel.extractors]
+jinja2 = jinja2.ext:babel_extract [i18n]
+
--- a/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/Jinja2-2.11.2.dist-info/top_level.txt
@ -0,0 +1 @@
+jinja2
--- a/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/LICENSE.rst
+++ b/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/LICENSE.rst
@ -0,0 +1,28 @@
+Copyright 2010 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/METADATA
@ -0,0 +1,105 @@
+Metadata-Version: 2.1
+Name: MarkupSafe
+Version: 1.1.1
+Summary: Safely add untrusted strings to HTML/XML markup.
+Home-page: https://palletsprojects.com/p/markupsafe/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: The Pallets Team
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://markupsafe.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/markupsafe
+Project-URL: Issue tracker, https://github.com/pallets/markupsafe/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: Text Processing :: Markup :: HTML
+Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
+Description-Content-Type: text/x-rst
+
+MarkupSafe
+==========
+
+MarkupSafe implements a text object that escapes characters so it is
+safe to use in HTML and XML. Characters that have special meanings are
+replaced so that they display as the actual characters. This mitigates
+injection attacks, meaning untrusted user input can safely be displayed
+on a page.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U MarkupSafe
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+Examples
+--------
+
+.. code-block:: pycon
+
+    >>> from markupsafe import Markup, escape
+    >>> # escape replaces special characters and wraps in Markup
+    >>> escape('<script>alert(document.cookie);</script>')
+    Markup(u'&lt;script&gt;alert(document.cookie);&lt;/script&gt;')
+    >>> # wrap in Markup to mark text "safe" and prevent escaping
+    >>> Markup('<strong>Hello</strong>')
+    Markup('<strong>hello</strong>')
+    >>> escape(Markup('<strong>Hello</strong>'))
+    Markup('<strong>hello</strong>')
+    >>> # Markup is a text subclass (str on Python 3, unicode on Python 2)
+    >>> # methods and operators escape their arguments
+    >>> template = Markup("Hello <em>%s</em>")
+    >>> template % '"World"'
+    Markup('Hello <em>&#34;World&#34;</em>')
+
+
+Donate
+------
+
+The Pallets organization develops and supports MarkupSafe and other
+libraries that use it. In order to grow the community of contributors
+and users, and allow the maintainers to devote more time to the
+projects, `please donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+*   Website: https://palletsprojects.com/p/markupsafe/
+*   Documentation: https://markupsafe.palletsprojects.com/
+*   License: `BSD-3-Clause <https://github.com/pallets/markupsafe/blob/master/LICENSE.rst>`_
+*   Releases: https://pypi.org/project/MarkupSafe/
+*   Code: https://github.com/pallets/markupsafe
+*   Issue tracker: https://github.com/pallets/markupsafe/issues
+*   Test status:
+
+    *   Linux, Mac: https://travis-ci.org/pallets/markupsafe
+    *   Windows: https://ci.appveyor.com/project/pallets/markupsafe
+
+*   Test coverage: https://codecov.io/gh/pallets/markupsafe
+*   Official chat: https://discord.gg/t6rrQZH
+
+
--- a/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/RECORD
@ -0,0 +1,15 @@
+MarkupSafe-1.1.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+MarkupSafe-1.1.1.dist-info/LICENSE.rst,sha256=RjHsDbX9kKVH4zaBcmTGeYIUM4FG-KyUtKV_lu6MnsQ,1503
+MarkupSafe-1.1.1.dist-info/METADATA,sha256=IFCP4hCNGjXJgMoSvdjPiKDLAMUTTWoxKXQsQvmyMNU,3653
+MarkupSafe-1.1.1.dist-info/RECORD,,
+MarkupSafe-1.1.1.dist-info/WHEEL,sha256=jovIjvNuo6l5lHtTPdXyjKVQ_5SCkmdptE5fkPNfjyM,101
+MarkupSafe-1.1.1.dist-info/top_level.txt,sha256=qy0Plje5IJuvsCBjejJyhDCjEAdcDLK_2agVcex8Z6U,11
+markupsafe/__init__.py,sha256=UAy1UKlykemnSZWIVn8RDqY0wvjV6lkeRwYOMNhw4bA,10453
+markupsafe/__pycache__/__init__.cpython-38.pyc,,
+markupsafe/__pycache__/_compat.cpython-38.pyc,,
+markupsafe/__pycache__/_constants.cpython-38.pyc,,
+markupsafe/__pycache__/_native.cpython-38.pyc,,
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+markupsafe/_constants.py,sha256=IXLUQkLM6CTustG5vEQTEy6pBB3z5pm84NkYU1aW9qI,4954
+markupsafe/_native.py,sha256=LwsYk-GHoPsPboRD_tNC6_jTmCj3MLtsnDFis7HjE50,1942
+markupsafe/_speedups.cp38-win32.pyd,sha256=8nGEdcR_DUewvF72FxW6d-aD5SYoLMe2prWwEEnH9ck,12800
--- a/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/WHEEL
@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.6)
+Root-Is-Purelib: false
+Tag: cp38-cp38-win32
+
--- a/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/MarkupSafe-1.1.1.dist-info/top_level.txt
@ -0,0 +1 @@
+markupsafe
--- a/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/LICENSE.rst
+++ b/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/LICENSE.rst
@ -0,0 +1,28 @@
+Copyright 2007 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/METADATA
@ -0,0 +1,128 @@
+Metadata-Version: 2.1
+Name: Werkzeug
+Version: 1.0.1
+Summary: The comprehensive WSGI web application library.
+Home-page: https://palletsprojects.com/p/werkzeug/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://werkzeug.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/werkzeug
+Project-URL: Issue tracker, https://github.com/pallets/werkzeug/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Application
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Middleware
+Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Description-Content-Type: text/x-rst
+Provides-Extra: dev
+Requires-Dist: pytest ; extra == 'dev'
+Requires-Dist: pytest-timeout ; extra == 'dev'
+Requires-Dist: coverage ; extra == 'dev'
+Requires-Dist: tox ; extra == 'dev'
+Requires-Dist: sphinx ; extra == 'dev'
+Requires-Dist: pallets-sphinx-themes ; extra == 'dev'
+Requires-Dist: sphinx-issues ; extra == 'dev'
+Provides-Extra: watchdog
+Requires-Dist: watchdog ; extra == 'watchdog'
+
+Werkzeug
+========
+
+*werkzeug* German noun: "tool". Etymology: *werk* ("work"), *zeug* ("stuff")
+
+Werkzeug is a comprehensive `WSGI`_ web application library. It began as
+a simple collection of various utilities for WSGI applications and has
+become one of the most advanced WSGI utility libraries.
+
+It includes:
+
+-   An interactive debugger that allows inspecting stack traces and
+    source code in the browser with an interactive interpreter for any
+    frame in the stack.
+-   A full-featured request object with objects to interact with
+    headers, query args, form data, files, and cookies.
+-   A response object that can wrap other WSGI applications and handle
+    streaming data.
+-   A routing system for matching URLs to endpoints and generating URLs
+    for endpoints, with an extensible system for capturing variables
+    from URLs.
+-   HTTP utilities to handle entity tags, cache control, dates, user
+    agents, cookies, files, and more.
+-   A threaded WSGI server for use while developing applications
+    locally.
+-   A test client for simulating HTTP requests during testing without
+    requiring running a server.
+
+Werkzeug is Unicode aware and doesn't enforce any dependencies. It is up
+to the developer to choose a template engine, database adapter, and even
+how to handle requests. It can be used to build all sorts of end user
+applications such as blogs, wikis, or bulletin boards.
+
+`Flask`_ wraps Werkzeug, using it to handle the details of WSGI while
+providing more structure and patterns for defining powerful
+applications.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U Werkzeug
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    from werkzeug.wrappers import Request, Response
+
+    @Request.application
+    def application(request):
+        return Response('Hello, World!')
+
+    if __name__ == '__main__':
+        from werkzeug.serving import run_simple
+        run_simple('localhost', 4000, application)
+
+
+Links
+-----
+
+-   Website: https://palletsprojects.com/p/werkzeug/
+-   Documentation: https://werkzeug.palletsprojects.com/
+-   Releases: https://pypi.org/project/Werkzeug/
+-   Code: https://github.com/pallets/werkzeug
+-   Issue tracker: https://github.com/pallets/werkzeug/issues
+-   Test status: https://dev.azure.com/pallets/werkzeug/_build
+-   Official chat: https://discord.gg/t6rrQZH
+
+.. _WSGI: https://wsgi.readthedocs.io/en/latest/
+.. _Flask: https://www.palletsprojects.com/p/flask/
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
--- a/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/RECORD
@ -0,0 +1,101 @@
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--- a/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/WHEEL
@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
--- a/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/Werkzeug-1.0.1.dist-info/top_level.txt
@ -0,0 +1 @@
+werkzeug
--- a/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/LICENSE
+++ b/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/LICENSE
@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
--- a/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/METADATA
@ -0,0 +1,334 @@
+Metadata-Version: 2.1
+Name: bidict
+Version: 0.21.2
+Summary: The bidirectional mapping library for Python.
+Home-page: https://bidict.readthedocs.io
+Author: Joshua Bronson
+Author-email: jabronson@gmail.com
+License: MPL 2.0
+Keywords: dict dictionary mapping datastructure bimap bijection bijective injective inverse reverse bidirectional two-way 2-way
+Platform: UNKNOWN
+Classifier: Development Status :: 4 - Beta
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=3.6
+Description-Content-Type: text/x-rst
+Provides-Extra: coverage
+Requires-Dist: coverage (<6) ; extra == 'coverage'
+Requires-Dist: pytest-cov (<3) ; extra == 'coverage'
+Provides-Extra: dev
+Requires-Dist: setuptools-scm ; extra == 'dev'
+Requires-Dist: hypothesis (<6) ; extra == 'dev'
+Requires-Dist: py (<2) ; extra == 'dev'
+Requires-Dist: pytest (<7) ; extra == 'dev'
+Requires-Dist: pytest-benchmark (<4,>=3.2.0) ; extra == 'dev'
+Requires-Dist: sortedcollections (<2) ; extra == 'dev'
+Requires-Dist: sortedcontainers (<3) ; extra == 'dev'
+Requires-Dist: Sphinx (<4) ; extra == 'dev'
+Requires-Dist: sphinx-autodoc-typehints (<2) ; extra == 'dev'
+Requires-Dist: coverage (<6) ; extra == 'dev'
+Requires-Dist: pytest-cov (<3) ; extra == 'dev'
+Requires-Dist: pre-commit (<3) ; extra == 'dev'
+Requires-Dist: tox (<4) ; extra == 'dev'
+Provides-Extra: docs
+Requires-Dist: Sphinx (<4) ; extra == 'docs'
+Requires-Dist: sphinx-autodoc-typehints (<2) ; extra == 'docs'
+Provides-Extra: precommit
+Requires-Dist: pre-commit (<3) ; extra == 'precommit'
+Provides-Extra: test
+Requires-Dist: hypothesis (<6) ; extra == 'test'
+Requires-Dist: py (<2) ; extra == 'test'
+Requires-Dist: pytest (<7) ; extra == 'test'
+Requires-Dist: pytest-benchmark (<4,>=3.2.0) ; extra == 'test'
+Requires-Dist: sortedcollections (<2) ; extra == 'test'
+Requires-Dist: sortedcontainers (<3) ; extra == 'test'
+Requires-Dist: Sphinx (<4) ; extra == 'test'
+Requires-Dist: sphinx-autodoc-typehints (<2) ; extra == 'test'
+
+.. Forward declarations for all the custom interpreted text roles that
+   Sphinx defines and that are used below. This helps Sphinx-unaware tools
+   (e.g. rst2html, PyPI's and GitHub's renderers, etc.).
+.. role:: doc
+
+.. Use :doc: rather than :ref: references below for better interop as well.
+
+
+``bidict``
+==========
+
+The bidirectional mapping library for Python.
+
+.. image:: https://raw.githubusercontent.com/jab/bidict/master/assets/logo-sm.png
+   :target: https://bidict.readthedocs.io/
+   :alt: bidict logo
+
+
+Status
+------
+
+.. image:: https://img.shields.io/pypi/v/bidict.svg
+   :target: https://pypi.org/project/bidict
+   :alt: Latest release
+
+.. image:: https://img.shields.io/readthedocs/bidict/master.svg
+   :target: https://bidict.readthedocs.io/en/master/
+   :alt: Documentation
+
+.. image:: https://api.travis-ci.org/jab/bidict.svg?branch=master
+   :target: https://travis-ci.org/jab/bidict
+   :alt: Travis-CI build status
+
+.. image:: https://codecov.io/gh/jab/bidict/branch/master/graph/badge.svg
+   :target: https://codecov.io/gh/jab/bidict
+   :alt: Test coverage
+
+.. Hide to reduce clutter
+   .. image:: https://img.shields.io/lgtm/alerts/github/jab/bidict.svg
+      :target: https://lgtm.com/projects/g/jab/bidict/
+      :alt: LGTM alerts
+   .. image:: https://bestpractices.coreinfrastructure.org/projects/2354/badge
+      :target: https://bestpractices.coreinfrastructure.org/en/projects/2354
+      :alt: CII best practices badge
+   .. image:: https://img.shields.io/badge/tidelift-pro%20support-orange.svg
+      :target: https://tidelift.com/subscription/pkg/pypi-bidict?utm_source=pypi-bidict&utm_medium=referral&utm_campaign=docs
+      :alt: Paid support available via Tidelift
+   .. image:: https://ci.appveyor.com/api/projects/status/gk133415udncwto3/branch/master?svg=true
+      :target: https://ci.appveyor.com/project/jab/bidict
+      :alt: AppVeyor (Windows) build status
+   .. image:: https://img.shields.io/pypi/pyversions/bidict.svg
+      :target: https://pypi.org/project/bidict
+      :alt: Supported Python versions
+   .. image:: https://img.shields.io/pypi/implementation/bidict.svg
+      :target: https://pypi.org/project/bidict
+      :alt: Supported Python implementations
+
+.. image:: https://img.shields.io/pypi/l/bidict.svg
+   :target: https://raw.githubusercontent.com/jab/bidict/master/LICENSE
+   :alt: License
+
+.. image:: https://static.pepy.tech/badge/bidict
+   :target: https://pepy.tech/project/bidict
+   :alt: PyPI Downloads
+
+
+``bidict``:
+^^^^^^^^^^^
+
+- has been used for many years by several teams at
+  **Google, Venmo, CERN, Bank of America Merrill Lynch, Bloomberg, Two Sigma,** and many others
+- has carefully designed APIs for
+  **safety, simplicity, flexibility, and ergonomics**
+- is **fast, lightweight, and has no runtime dependencies** other than Python's standard library
+- **integrates natively** with Python’s ``collections.abc`` interfaces
+- provides **type hints** for all public APIs
+- is implemented in **concise, well-factored, pure (PyPy-compatible) Python code**
+  that is **optimized for running efficiently**
+  as well as for **reading and learning** [#fn-learning]_
+- has **extensive docs and test coverage**
+  (including property-based tests and benchmarks)
+  run continuously on all supported Python versions
+
+
+Note: Python 3 Required
+~~~~~~~~~~~~~~~~~~~~~~~
+
+As promised in the 0.18.2 release (see :doc:`changelog` [#fn-changelog]_),
+**Python 2 is no longer supported**.
+Version 0.18.3
+is the last release of ``bidict`` that supports Python 2.
+This makes ``bidict`` more efficient on Python 3
+and enables further improvement to bidict in the future.
+See `python3statement.org <https://python3statement.org>`__
+for more info.
+
+
+Installation
+------------
+
+``pip install bidict``
+
+
+Quick Start
+-----------
+
+.. code:: python
+
+   >>> from bidict import bidict
+   >>> element_by_symbol = bidict({'H': 'hydrogen'})
+   >>> element_by_symbol['H']
+   'hydrogen'
+   >>> element_by_symbol.inverse['hydrogen']
+   'H'
+
+
+For more usage documentation,
+head to the :doc:`intro` [#fn-intro]_
+and proceed from there.
+
+
+Community Support
+-----------------
+
+.. image:: https://img.shields.io/badge/chat-on%20gitter-5AB999.svg?logo=gitter-white
+   :target: https://gitter.im/jab/bidict
+   :alt: Chat
+
+If you are thinking of using ``bidict`` in your work,
+or if you have any questions, comments, or suggestions,
+I'd love to know about your use case
+and provide as much voluntary support for it as possible.
+
+Please feel free to leave a message in the
+`chatroom <https://gitter.im/jab/bidict>`__
+or open a new issue on GitHub.
+You can search through
+`existing issues <https://github.com/jab/bidict/issues>`__
+before creating a new one
+in case your questions or concerns have been adressed there already.
+
+
+Enterprise-Grade Support via Tidelift
+-------------------------------------
+
+.. image:: https://img.shields.io/badge/tidelift-pro%20support-orange.svg
+   :target: https://tidelift.com/subscription/pkg/pypi-bidict?utm_source=pypi-bidict&utm_medium=referral&utm_campaign=readme
+   :alt: Paid support available via Tidelift
+
+If your use case requires a greater level of support,
+enterprise-grade support for ``bidict`` can be obtained via the
+`Tidelift subscription <https://tidelift.com/subscription/pkg/pypi-bidict?utm_source=pypi-bidict&utm_medium=referral&utm_campaign=readme>`__.
+
+
+Notice of Usage
+---------------
+
+If you use ``bidict``,
+and especially if your usage or your organization is significant in some way,
+please let me know.
+
+You can:
+
+- `star bidict on GitHub <https://github.com/jab/bidict>`__
+- `create an issue <https://github.com/jab/bidict/issues/new?title=Notice+of+Usage&body=I+am+using+bidict+for...>`__
+- leave a message in the `chat room <https://gitter.im/jab/bidict>`__
+- `email me <mailto:jabronson@gmail.com?subject=bidict&body=I%20am%20using%20bidict%20for...>`__
+
+
+Changelog
+---------
+
+See the :doc:`changelog` [#fn-changelog]_
+for a history of notable changes to ``bidict``.
+
+
+Release Notifications
+---------------------
+
+.. duplicated in CHANGELOG.rst:
+   (would use `.. include::` but GitHub doesn't understand it)
+
+.. image:: https://img.shields.io/badge/libraries.io-subscribe-5BC0DF.svg
+   :target: https://libraries.io/pypi/bidict
+   :alt: Follow on libraries.io
+
+Subscribe to releases
+`on GitHub <https://github.blog/changelog/2018-11-27-watch-releases/>`__ or
+`libraries.io <https://libraries.io/pypi/bidict>`__
+to be notified when new versions of ``bidict`` are released.
+
+
+Learning from ``bidict``
+------------------------
+
+One of the best things about ``bidict``
+is that it touches a surprising number of
+interesting Python corners,
+especially given its small size and scope.
+
+Check out :doc:`learning-from-bidict` [#fn-learning]_
+if you're interested in learning more.
+
+
+Contributing
+------------
+
+``bidict`` is currently a one-person operation
+maintained on a voluntary basis.
+
+Your help would be most welcome!
+
+
+Reviewers Wanted!
+^^^^^^^^^^^^^^^^^
+
+One of the most valuable ways to contribute to ``bidict`` –
+and to explore some interesting Python corners [#fn-learning]_
+while you're at it –
+is to review the relatively small codebase.
+
+Please create an issue or pull request with any improvements you'd propose
+or any other results you found.
+Submitting a `draft PR <https://github.blog/2019-02-14-introducing-draft-pull-requests/>`__
+with feedback in inline code comments, or a
+`"Review results" issue <https://github.com/jab/bidict/issues/new?title=Review+results>`__,
+would each work well.
+
+You can also
+1 `this issue <https://github.com/jab/bidict/issues/63>`__
+to sign up to give feedback on future proposed changes
+that are in need of a reviewer.
+
+
+Giving Back
+^^^^^^^^^^^
+
+.. duplicated in CONTRIBUTING.rst
+   (would use `.. include::` but GitHub doesn't understand it)
+
+``bidict`` is the product of hundreds of hours of unpaid, voluntary work.
+
+If ``bidict`` has helped you accomplish your work,
+especially work you've been paid for,
+please consider chipping in toward the costs
+of its maintenance and development
+and/or ask your organization to do the same.
+
+.. image:: https://raw.githubusercontent.com/jab/bidict/master/assets/support-on-gumroad.png
+   :target: https://gumroad.com/l/bidict
+   :alt: Support bidict
+
+
+Finding Documentation
+---------------------
+
+If you're viewing this on `<https://bidict.readthedocs.io>`__,
+note that multiple versions of the documentation are available,
+and you can choose a different version using the popup menu at the bottom-right.
+Please make sure you're viewing the version of the documentation
+that corresponds to the version of ``bidict`` you'd like to use.
+
+If you're viewing this on GitHub, PyPI, or some other place
+that can't render and link this documentation properly
+and are seeing broken links,
+try these alternate links instead:
+
+.. [#fn-learning] `<docs/learning-from-bidict.rst>`__ | `<https://bidict.readthedocs.io/learning-from-bidict.html>`__
+
+.. [#fn-changelog] `<CHANGELOG.rst>`__ | `<https://bidict.readthedocs.io/changelog.html>`__
+
+.. [#fn-intro] `<docs/intro.rst>`__ | `<https://bidict.readthedocs.io/intro.html>`__
+
+
+----
+
+Next: :doc:`intro` [#fn-intro]_
+
+
--- a/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/RECORD
@ -0,0 +1,41 @@
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+bidict-0.21.2.dist-info/top_level.txt,sha256=WuQO02jp0ODioS7sJoaHg3JJ5_3h6Sxo9RITvNGPYmc,7
+bidict/__init__.py,sha256=A2ZUK4jTHNN6T3QUaSh7xuIwc-Ytgw6gVLHNx07D7Fo,3910
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+bidict/__pycache__/_frozenordered.cpython-38.pyc,,
+bidict/__pycache__/_iter.cpython-38.pyc,,
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+bidict/_abc.py,sha256=irEWsolFCp8ps77OKmWwB0gTrpXc5be0RBdHaQoPybk,4626
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+bidict/_dup.py,sha256=j0DSseguIdCgAhqxm0Zn2887110zx70F19Lvw7hiayg,1819
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+bidict/_frozenbidict.py,sha256=IYMIzsm9pAXTS819Tw7z_VTLIEZir4oLJbrcRc5yFP8,2494
+bidict/_frozenordered.py,sha256=E4kzBIoriZLuth9I1ll57KelvUN_xDAvZjQH7GNdn30,3224
+bidict/_iter.py,sha256=F9zoHs-IrkucujbRGnMJslH_Gc_Qrla4Mk1sOvn7ELg,2333
+bidict/_mut.py,sha256=MBXzglmeNJniRbdZ1C0Tx14pcsaBdi1NPaaFGIzZEpg,7352
+bidict/_named.py,sha256=_WQjoz9pE1d_HwVQX05vn5TthOREOw49yDdFSs5lvU4,3784
+bidict/_orderedbase.py,sha256=yMIRfDtY5DQJoAeI5YvIW49O42MuKqK8qxDrczr1NQY,12196
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+bidict/_version.py,sha256=e4Wu3F4t-gj1TaiLYadYEQ_3R8pNGz4Xi1K4eN1WFIw,117
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+bidict/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
--- a/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/WHEEL
@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.35.1)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
--- a/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/bidict-0.21.2.dist-info/top_level.txt
@ -0,0 +1 @@
+bidict
--- a/matteo_env/Lib/site-packages/bidict/init.py
+++ b/matteo_env/Lib/site-packages/bidict/init.py
@ -0,0 +1,94 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+#                             Current: __init__.py            Next: _abc.py →
+#==============================================================================
+
+
+"""The bidirectional mapping library for Python.
+
+bidict by example:
+
+.. code-block:: python
+
+   >>> from bidict import bidict
+   >>> element_by_symbol = bidict({'H': 'hydrogen'})
+   >>> element_by_symbol['H']
+   'hydrogen'
+   >>> element_by_symbol.inverse['hydrogen']
+   'H'
+
+
+Please see https://github.com/jab/bidict for the most up-to-date code and
+https://bidict.readthedocs.io for the most up-to-date documentation
+if you are reading this elsewhere.
+
+
+.. :copyright: (c) 2009-2020 Joshua Bronson.
+.. :license: MPLv2. See LICENSE for details.
+"""
+
+# Use private aliases to not re-export these publicly (for Sphinx automodule with imported-members).
+from sys import version_info as _version_info
+
+
+if _version_info < (3, 6):  # pragma: no cover
+    raise ImportError('Python 3.6+ is required.')
+
+# The rest of this file only collects functionality implemented in the rest of the
+# source for the purposes of exporting it under the `bidict` module namespace.
+# flake8: noqa: F401 (imported but unused)
+from ._abc import BidirectionalMapping, MutableBidirectionalMapping
+from ._base import BidictBase
+from ._mut import MutableBidict
+from ._bidict import bidict
+from ._frozenbidict import frozenbidict
+from ._frozenordered import FrozenOrderedBidict
+from ._named import namedbidict
+from ._orderedbase import OrderedBidictBase
+from ._orderedbidict import OrderedBidict
+from ._dup import ON_DUP_DEFAULT, ON_DUP_RAISE, ON_DUP_DROP_OLD, RAISE, DROP_OLD, DROP_NEW, OnDup, OnDupAction
+from ._exc import BidictException, DuplicationError, KeyDuplicationError, ValueDuplicationError, KeyAndValueDuplicationError
+from ._iter import inverted
+from .metadata import (
+    __author__, __maintainer__, __copyright__, __email__, __credits__, __url__,
+    __license__, __status__, __description__, __keywords__, __version__, __version_info__,
+)
+
+# Set __module__ of re-exported classes to the 'bidict' top-level module name
+# so that private/internal submodules are not exposed to users e.g. in repr  strings.
+_locals = tuple(locals().items())
+for _name, _obj in _locals:  # pragma: no cover
+    if not getattr(_obj, '__module__', '').startswith('bidict.'):
+        continue
+    try:
+        _obj.__module__ = 'bidict'
+    except AttributeError as exc:  # raised when __module__ is read-only (as in OnDup)
+        pass
+
+
+#                             * Code review nav *
+#==============================================================================
+#                             Current: __init__.py            Next: _abc.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_abc.py
+++ b/matteo_env/Lib/site-packages/bidict/_abc.py
@ -0,0 +1,105 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: __init__.py         Current: _abc.py              Next: _base.py →
+#==============================================================================
+
+
+"""Provide the :class:`BidirectionalMapping` abstract base class."""
+
+import typing as _t
+from abc import abstractmethod
+
+from ._typing import KT, VT
+
+
+class BidirectionalMapping(_t.Mapping[KT, VT]):
+    """Abstract base class (ABC) for bidirectional mapping types.
+
+    Extends :class:`collections.abc.Mapping` primarily by adding the
+    (abstract) :attr:`inverse` property,
+    which implementors of :class:`BidirectionalMapping`
+    should override to return a reference to the inverse
+    :class:`BidirectionalMapping` instance.
+    """
+
+    __slots__ = ()
+
+    @property
+    @abstractmethod
+    def inverse(self) -> 'BidirectionalMapping[VT, KT]':
+        """The inverse of this bidirectional mapping instance.
+
+        *See also* :attr:`bidict.BidictBase.inverse`, :attr:`bidict.BidictBase.inv`
+
+        :raises NotImplementedError: Meant to be overridden in subclasses.
+        """
+        # The @abstractproperty decorator prevents BidirectionalMapping subclasses from being
+        # instantiated unless they override this method. So users shouldn't be able to get to the
+        # point where they can unintentionally call this implementation of .inverse on something
+        # anyway. Could leave the method body empty, but raise NotImplementedError so it's extra
+        # clear there's no reason to call this implementation (e.g. via super() after overriding).
+        raise NotImplementedError
+
+    def __inverted__(self) -> _t.Iterator[_t.Tuple[VT, KT]]:
+        """Get an iterator over the items in :attr:`inverse`.
+
+        This is functionally equivalent to iterating over the items in the
+        forward mapping and inverting each one on the fly, but this provides a
+        more efficient implementation: Assuming the already-inverted items
+        are stored in :attr:`inverse`, just return an iterator over them directly.
+
+        Providing this default implementation enables external functions,
+        particularly :func:`~bidict.inverted`, to use this optimized
+        implementation when available, instead of having to invert on the fly.
+
+        *See also* :func:`bidict.inverted`
+        """
+        return iter(self.inverse.items())
+
+    def values(self) -> _t.AbstractSet[VT]:  # type: ignore  # https://github.com/python/typeshed/issues/4435
+        """A set-like object providing a view on the contained values.
+
+        Override the implementation inherited from
+        :class:`~collections.abc.Mapping`.
+        Because the values of a :class:`~bidict.BidirectionalMapping`
+        are the keys of its inverse,
+        this returns a :class:`~collections.abc.KeysView`
+        rather than a :class:`~collections.abc.ValuesView`,
+        which has the advantages of constant-time containment checks
+        and supporting set operations.
+        """
+        return self.inverse.keys()
+
+
+class MutableBidirectionalMapping(BidirectionalMapping[KT, VT], _t.MutableMapping[KT, VT]):
+    """Abstract base class (ABC) for mutable bidirectional mapping types."""
+
+    __slots__ = ()
+
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: __init__.py         Current: _abc.py              Next: _base.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_base.py
+++ b/matteo_env/Lib/site-packages/bidict/_base.py
@ -0,0 +1,383 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+# ← Prev: _abc.py             Current: _base.py   Next:     _frozenbidict.py →
+#==============================================================================
+
+
+"""Provide :class:`BidictBase`."""
+
+import typing as _t
+from collections import namedtuple
+from copy import copy
+from weakref import ref
+
+from ._abc import BidirectionalMapping
+from ._dup import ON_DUP_DEFAULT, RAISE, DROP_OLD, DROP_NEW, OnDup
+from ._exc import DuplicationError, KeyDuplicationError, ValueDuplicationError, KeyAndValueDuplicationError
+from ._iter import _iteritems_args_kw
+from ._typing import _NONE, KT, VT, OKT, OVT, IterItems, MapOrIterItems
+
+
+_WriteResult = namedtuple('_WriteResult', 'key val oldkey oldval')
+_DedupResult = namedtuple('_DedupResult', 'isdupkey isdupval invbyval fwdbykey')
+_NODUP = _DedupResult(False, False, _NONE, _NONE)
+
+BT = _t.TypeVar('BT', bound='BidictBase')  # typevar for BidictBase.copy
+
+
+class BidictBase(BidirectionalMapping[KT, VT]):
+    """Base class implementing :class:`BidirectionalMapping`."""
+
+    __slots__ = ['_fwdm', '_invm', '_inv', '_invweak', '_hash', '__weakref__']
+
+    #: The default :class:`~bidict.OnDup`
+    #: that governs behavior when a provided item
+    #: duplicates the key or value of other item(s).
+    #:
+    #: *See also* :ref:`basic-usage:Values Must Be Unique`, :doc:`extending`
+    on_dup = ON_DUP_DEFAULT
+
+    _fwdm_cls = dict  #: class of the backing forward mapping
+    _invm_cls = dict  #: class of the backing inverse mapping
+
+    #: The object used by :meth:`__repr__` for printing the contained items.
+    _repr_delegate = dict
+
+    def __init_subclass__(cls, **kw):
+        super().__init_subclass__(**kw)
+        # Compute and set _inv_cls, the inverse of this bidict class.
+        if '_inv_cls' in cls.__dict__:
+            return
+        if cls._fwdm_cls is cls._invm_cls:
+            cls._inv_cls = cls
+            return
+        inv_cls = type(cls.__name__ + 'Inv', cls.__bases__, {
+            **cls.__dict__,
+            '_inv_cls': cls,
+            '_fwdm_cls': cls._invm_cls,
+            '_invm_cls': cls._fwdm_cls,
+        })
+        cls._inv_cls = inv_cls
+
+    @_t.overload
+    def __init__(self, __arg: _t.Mapping[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def __init__(self, __arg: IterItems[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def __init__(self, **kw: VT) -> None: ...
+    def __init__(self, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        """Make a new bidirectional dictionary.
+        The signature behaves like that of :class:`dict`.
+        Items passed in are added in the order they are passed,
+        respecting the :attr:`on_dup` class attribute in the process.
+        """
+        #: The backing :class:`~collections.abc.Mapping`
+        #: storing the forward mapping data (*key* → *value*).
+        self._fwdm: _t.Dict[KT, VT] = self._fwdm_cls()
+        #: The backing :class:`~collections.abc.Mapping`
+        #: storing the inverse mapping data (*value* → *key*).
+        self._invm: _t.Dict[VT, KT] = self._invm_cls()
+        self._init_inv()
+        if args or kw:
+            self._update(True, self.on_dup, *args, **kw)
+
+    def _init_inv(self) -> None:
+        # Create the inverse bidict instance via __new__, bypassing its __init__ so that its
+        # _fwdm and _invm can be assigned to this bidict's _invm and _fwdm. Store it in self._inv,
+        # which holds a strong reference to a bidict's inverse, if one is available.
+        self._inv = inv = self._inv_cls.__new__(self._inv_cls)  # type: ignore
+        inv._fwdm = self._invm
+        inv._invm = self._fwdm
+        # Only give the inverse a weak reference to this bidict to avoid creating a reference cycle,
+        # stored in the _invweak attribute. See also the docs in
+        # :ref:`addendum:Bidict Avoids Reference Cycles`
+        inv._inv = None
+        inv._invweak = ref(self)
+        # Since this bidict has a strong reference to its inverse already, set its _invweak to None.
+        self._invweak = None
+
+    @property
+    def _isinv(self) -> bool:
+        return self._inv is None
+
+    @property
+    def inverse(self) -> 'BidictBase[VT, KT]':
+        """The inverse of this bidict."""
+        # Resolve and return a strong reference to the inverse bidict.
+        # One may be stored in self._inv already.
+        if self._inv is not None:
+            return self._inv  # type: ignore
+        # Otherwise a weakref is stored in self._invweak. Try to get a strong ref from it.
+        assert self._invweak is not None
+        inv = self._invweak()
+        if inv is not None:
+            return inv
+        # Refcount of referent must have dropped to zero, as in `bidict().inv.inv`. Init a new one.
+        self._init_inv()  # Now this bidict will retain a strong ref to its inverse.
+        return self._inv
+
+    #: Alias for :attr:`inverse`.
+    inv = inverse
+
+    def __getstate__(self) -> dict:
+        """Needed to enable pickling due to use of :attr:`__slots__` and weakrefs.
+
+        *See also* :meth:`object.__getstate__`
+        """
+        state = {}
+        for cls in self.__class__.__mro__:
+            slots = getattr(cls, '__slots__', ())
+            for slot in slots:
+                if hasattr(self, slot):
+                    state[slot] = getattr(self, slot)
+        # weakrefs can't be pickled.
+        state.pop('_invweak', None)  # Added back in __setstate__ via _init_inv call.
+        state.pop('__weakref__', None)  # Not added back in __setstate__. Python manages this one.
+        return state
+
+    def __setstate__(self, state: dict) -> None:
+        """Implemented because use of :attr:`__slots__` would prevent unpickling otherwise.
+
+        *See also* :meth:`object.__setstate__`
+        """
+        for slot, value in state.items():
+            setattr(self, slot, value)
+        self._init_inv()
+
+    def __repr__(self) -> str:
+        """See :func:`repr`."""
+        clsname = self.__class__.__name__
+        if not self:
+            return f'{clsname}()'
+        return f'{clsname}({self._repr_delegate(self.items())})'
+
+    # The inherited Mapping.__eq__ implementation would work, but it's implemented in terms of an
+    # inefficient ``dict(self.items()) == dict(other.items())`` comparison, so override it with a
+    # more efficient implementation.
+    def __eq__(self, other: object) -> bool:
+        """*x.__eq__(other)　⟺　x == other*
+
+        Equivalent to *dict(x.items()) == dict(other.items())*
+        but more efficient.
+
+        Note that :meth:`bidict's __eq__() <bidict.bidict.__eq__>` implementation
+        is inherited by subclasses,
+        in particular by the ordered bidict subclasses,
+        so even with ordered bidicts,
+        :ref:`== comparison is order-insensitive <eq-order-insensitive>`.
+
+        *See also* :meth:`bidict.FrozenOrderedBidict.equals_order_sensitive`
+        """
+        if not isinstance(other, _t.Mapping) or len(self) != len(other):
+            return False
+        selfget = self.get
+        return all(selfget(k, _NONE) == v for (k, v) in other.items())  # type: ignore
+
+    # The following methods are mutating and so are not public. But they are implemented in this
+    # non-mutable base class (rather than the mutable `bidict` subclass) because they are used here
+    # during initialization (starting with the `_update` method). (Why is this? Because `__init__`
+    # and `update` share a lot of the same behavior (inserting the provided items while respecting
+    # `on_dup`), so it makes sense for them to share implementation too.)
+    def _pop(self, key: KT) -> VT:
+        val = self._fwdm.pop(key)
+        del self._invm[val]
+        return val
+
+    def _put(self, key: KT, val: VT, on_dup: OnDup) -> None:
+        dedup_result = self._dedup_item(key, val, on_dup)
+        if dedup_result is not None:
+            self._write_item(key, val, dedup_result)
+
+    def _dedup_item(self, key: KT, val: VT, on_dup: OnDup) -> _t.Optional[_DedupResult]:
+        """Check *key* and *val* for any duplication in self.
+
+        Handle any duplication as per the passed in *on_dup*.
+
+        (key, val) already present is construed as a no-op, not a duplication.
+
+        If duplication is found and the corresponding :class:`~bidict.OnDupAction` is
+        :attr:`~bidict.DROP_NEW`, return None.
+
+        If duplication is found and the corresponding :class:`~bidict.OnDupAction` is
+        :attr:`~bidict.RAISE`, raise the appropriate error.
+
+        If duplication is found and the corresponding :class:`~bidict.OnDupAction` is
+        :attr:`~bidict.DROP_OLD`,
+        or if no duplication is found,
+        return the :class:`_DedupResult` *(isdupkey, isdupval, oldkey, oldval)*.
+        """
+        fwdm = self._fwdm
+        invm = self._invm
+        oldval: OVT = fwdm.get(key, _NONE)
+        oldkey: OKT = invm.get(val, _NONE)
+        isdupkey = oldval is not _NONE
+        isdupval = oldkey is not _NONE
+        dedup_result = _DedupResult(isdupkey, isdupval, oldkey, oldval)
+        if isdupkey and isdupval:
+            if self._already_have(key, val, oldkey, oldval):
+                # (key, val) duplicates an existing item -> no-op.
+                return None
+            # key and val each duplicate a different existing item.
+            if on_dup.kv is RAISE:
+                raise KeyAndValueDuplicationError(key, val)
+            if on_dup.kv is DROP_NEW:
+                return None
+            assert on_dup.kv is DROP_OLD
+            # Fall through to the return statement on the last line.
+        elif isdupkey:
+            if on_dup.key is RAISE:
+                raise KeyDuplicationError(key)
+            if on_dup.key is DROP_NEW:
+                return None
+            assert on_dup.key is DROP_OLD
+            # Fall through to the return statement on the last line.
+        elif isdupval:
+            if on_dup.val is RAISE:
+                raise ValueDuplicationError(val)
+            if on_dup.val is DROP_NEW:
+                return None
+            assert on_dup.val is DROP_OLD
+            # Fall through to the return statement on the last line.
+        # else neither isdupkey nor isdupval.
+        return dedup_result
+
+    @staticmethod
+    def _already_have(key: KT, val: VT, oldkey: OKT, oldval: OVT) -> bool:
+        # Overridden by _orderedbase.OrderedBidictBase.
+        isdup = oldkey == key
+        assert isdup == (oldval == val), f'{key} {val} {oldkey} {oldval}'
+        return isdup
+
+    def _write_item(self, key: KT, val: VT, dedup_result: _DedupResult) -> _WriteResult:
+        # Overridden by _orderedbase.OrderedBidictBase.
+        isdupkey, isdupval, oldkey, oldval = dedup_result
+        fwdm = self._fwdm
+        invm = self._invm
+        fwdm[key] = val
+        invm[val] = key
+        if isdupkey:
+            del invm[oldval]
+        if isdupval:
+            del fwdm[oldkey]
+        return _WriteResult(key, val, oldkey, oldval)
+
+    def _update(self, init: bool, on_dup: OnDup, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        # args[0] may be a generator that yields many items, so process input in a single pass.
+        if not args and not kw:
+            return
+        can_skip_dup_check = not self and not kw and isinstance(args[0], BidirectionalMapping)
+        if can_skip_dup_check:
+            self._update_no_dup_check(args[0])  # type: ignore
+            return
+        can_skip_rollback = init or RAISE not in on_dup
+        if can_skip_rollback:
+            self._update_no_rollback(on_dup, *args, **kw)
+        else:
+            self._update_with_rollback(on_dup, *args, **kw)
+
+    def _update_no_dup_check(self, other: BidirectionalMapping[KT, VT]) -> None:
+        write_item = self._write_item
+        for (key, val) in other.items():
+            write_item(key, val, _NODUP)
+
+    def _update_no_rollback(self, on_dup: OnDup, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        put = self._put
+        for (key, val) in _iteritems_args_kw(*args, **kw):
+            put(key, val, on_dup)
+
+    def _update_with_rollback(self, on_dup: OnDup, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        """Update, rolling back on failure."""
+        writes: _t.List[_t.Tuple[_DedupResult, _WriteResult]] = []
+        append_write = writes.append
+        dedup_item = self._dedup_item
+        write_item = self._write_item
+        for (key, val) in _iteritems_args_kw(*args, **kw):
+            try:
+                dedup_result = dedup_item(key, val, on_dup)
+            except DuplicationError:
+                undo_write = self._undo_write
+                for dedup_result, write_result in reversed(writes):
+                    undo_write(dedup_result, write_result)
+                raise
+            if dedup_result is not None:
+                write_result = write_item(key, val, dedup_result)
+                append_write((dedup_result, write_result))
+
+    def _undo_write(self, dedup_result: _DedupResult, write_result: _WriteResult) -> None:
+        isdupkey, isdupval, _, _ = dedup_result
+        key, val, oldkey, oldval = write_result
+        if not isdupkey and not isdupval:
+            self._pop(key)
+            return
+        fwdm = self._fwdm
+        invm = self._invm
+        if isdupkey:
+            fwdm[key] = oldval
+            invm[oldval] = key
+            if not isdupval:
+                del invm[val]
+        if isdupval:
+            invm[val] = oldkey
+            fwdm[oldkey] = val
+            if not isdupkey:
+                del fwdm[key]
+
+    def copy(self: BT) -> BT:
+        """A shallow copy."""
+        # Could just ``return self.__class__(self)`` here instead, but the below is faster. It uses
+        # __new__ to create a copy instance while bypassing its __init__, which would result
+        # in copying this bidict's items into the copy instance one at a time. Instead, make whole
+        # copies of each of the backing mappings, and make them the backing mappings of the copy,
+        # avoiding copying items one at a time.
+        cp = self.__class__.__new__(self.__class__)
+        cp._fwdm = copy(self._fwdm)
+        cp._invm = copy(self._invm)
+        cp._init_inv()
+        return cp  # type: ignore
+
+    #: Used for the copy protocol.
+    #: *See also* the :mod:`copy` module
+    __copy__ = copy
+
+    def __len__(self) -> int:
+        """The number of contained items."""
+        return len(self._fwdm)
+
+    def __iter__(self) -> _t.Iterator[KT]:
+        """Iterator over the contained keys."""
+        return iter(self._fwdm)
+
+    def __getitem__(self, key: KT) -> VT:
+        """*x.__getitem__(key)　⟺　x[key]*"""
+        return self._fwdm[key]
+
+
+# Work around weakref slot with Generics bug on Python 3.6 (https://bugs.python.org/issue41451):
+BidictBase.__slots__.remove('__weakref__')
+
+#                             * Code review nav *
+#==============================================================================
+# ← Prev: _abc.py             Current: _base.py   Next:     _frozenbidict.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_bidict.py
+++ b/matteo_env/Lib/site-packages/bidict/_bidict.py
@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: _mut.py            Current: _bidict.py     Next: _orderedbase.py →
+#==============================================================================
+
+
+"""Provide :class:`bidict`."""
+
+import typing as _t
+
+from ._delegating import _DelegatingBidict
+from ._mut import MutableBidict
+from ._typing import KT, VT
+
+
+class bidict(_DelegatingBidict[KT, VT], MutableBidict[KT, VT]):
+    """Base class for mutable bidirectional mappings."""
+
+    __slots__ = ()
+
+    if _t.TYPE_CHECKING:
+        @property
+        def inverse(self) -> 'bidict[VT, KT]': ...
+
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: _mut.py            Current: _bidict.py     Next: _orderedbase.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_delegating.py
+++ b/matteo_env/Lib/site-packages/bidict/_delegating.py
@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+"""Provide :class:`_DelegatingBidict`."""
+
+import typing as _t
+
+from ._base import BidictBase
+from ._typing import KT, VT
+
+
+class _DelegatingBidict(BidictBase[KT, VT]):
+    """Provide optimized implementations of several methods by delegating to backing dicts.
+
+    Used to override less efficient implementations inherited by :class:`~collections.abc.Mapping`.
+    """
+
+    __slots__ = ()
+
+    def __iter__(self) -> _t.Iterator[KT]:
+        """Iterator over the contained keys."""
+        return iter(self._fwdm)
+
+    def keys(self) -> _t.KeysView[KT]:
+        """A set-like object providing a view on the contained keys."""
+        return self._fwdm.keys()
+
+    def values(self) -> _t.KeysView[VT]:  # type: ignore  # https://github.com/python/typeshed/issues/4435
+        """A set-like object providing a view on the contained values."""
+        return self._invm.keys()
+
+    def items(self) -> _t.ItemsView[KT, VT]:
+        """A set-like object providing a view on the contained items."""
+        return self._fwdm.items()
--- a/matteo_env/Lib/site-packages/bidict/_dup.py
+++ b/matteo_env/Lib/site-packages/bidict/_dup.py
@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+"""Provide :class:`OnDup` and related functionality."""
+
+
+from collections import namedtuple
+from enum import Enum
+
+
+class OnDupAction(Enum):
+    """An action to take to prevent duplication from occurring."""
+
+    #: Raise a :class:`~bidict.DuplicationError`.
+    RAISE = 'RAISE'
+    #: Overwrite existing items with new items.
+    DROP_OLD = 'DROP_OLD'
+    #: Keep existing items and drop new items.
+    DROP_NEW = 'DROP_NEW'
+
+    def __repr__(self) -> str:
+        return f'<{self.name}>'
+
+
+RAISE = OnDupAction.RAISE
+DROP_OLD = OnDupAction.DROP_OLD
+DROP_NEW = OnDupAction.DROP_NEW
+
+
+class OnDup(namedtuple('_OnDup', 'key val kv')):
+    r"""A 3-tuple of :class:`OnDupAction`\s specifying how to handle the 3 kinds of duplication.
+
+    *See also* :ref:`basic-usage:Values Must Be Unique`
+
+    If *kv* is not specified, *val* will be used for *kv*.
+    """
+
+    __slots__ = ()
+
+    def __new__(cls, key: OnDupAction = DROP_OLD, val: OnDupAction = RAISE, kv: OnDupAction = RAISE) -> 'OnDup':
+        """Override to provide user-friendly default values."""
+        return super().__new__(cls, key, val, kv or val)
+
+
+#: Default :class:`OnDup` used for the
+#: :meth:`~bidict.bidict.__init__`,
+#: :meth:`~bidict.bidict.__setitem__`, and
+#: :meth:`~bidict.bidict.update` methods.
+ON_DUP_DEFAULT = OnDup()
+#: An :class:`OnDup` whose members are all :obj:`RAISE`.
+ON_DUP_RAISE = OnDup(key=RAISE, val=RAISE, kv=RAISE)
+#: An :class:`OnDup` whose members are all :obj:`DROP_OLD`.
+ON_DUP_DROP_OLD = OnDup(key=DROP_OLD, val=DROP_OLD, kv=DROP_OLD)
--- a/matteo_env/Lib/site-packages/bidict/_exc.py
+++ b/matteo_env/Lib/site-packages/bidict/_exc.py
@ -0,0 +1,35 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+"""Provide all bidict exceptions."""
+
+
+class BidictException(Exception):
+    """Base class for bidict exceptions."""
+
+
+class DuplicationError(BidictException):
+    """Base class for exceptions raised when uniqueness is violated
+    as per the :attr:~bidict.RAISE` :class:`~bidict.OnDupAction`.
+    """
+
+
+class KeyDuplicationError(DuplicationError):
+    """Raised when a given key is not unique."""
+
+
+class ValueDuplicationError(DuplicationError):
+    """Raised when a given value is not unique."""
+
+
+class KeyAndValueDuplicationError(KeyDuplicationError, ValueDuplicationError):
+    """Raised when a given item's key and value are not unique.
+
+    That is, its key duplicates that of another item,
+    and its value duplicates that of a different other item.
+    """
--- a/matteo_env/Lib/site-packages/bidict/_frozenbidict.py
+++ b/matteo_env/Lib/site-packages/bidict/_frozenbidict.py
@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+# ← Prev: _base.py         Current: _frozenbidict.py           Next: _mut.py →
+#==============================================================================
+
+"""Provide :class:`frozenbidict`, an immutable, hashable bidirectional mapping type."""
+
+import typing as _t
+
+from ._delegating import _DelegatingBidict
+from ._typing import KT, VT
+
+
+class frozenbidict(_DelegatingBidict[KT, VT]):
+    """Immutable, hashable bidict type."""
+
+    __slots__ = ()
+
+    # Work around lack of support for higher-kinded types in mypy.
+    # Ref: https://github.com/python/typing/issues/548#issuecomment-621571821
+    # Remove this and similar type stubs from other classes if support is ever added.
+    if _t.TYPE_CHECKING:
+        @property
+        def inverse(self) -> 'frozenbidict[VT, KT]': ...
+
+    def __hash__(self) -> int:
+        """The hash of this bidict as determined by its items."""
+        if getattr(self, '_hash', None) is None:
+            self._hash = _t.ItemsView(self)._hash()  # type: ignore
+        return self._hash  # type: ignore
+
+
+#                             * Code review nav *
+#==============================================================================
+# ← Prev: _base.py         Current: _frozenbidict.py           Next: _mut.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_frozenordered.py
+++ b/matteo_env/Lib/site-packages/bidict/_frozenordered.py
@ -0,0 +1,75 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+#← Prev: _orderedbase.py  Current: _frozenordered.py  Next: _orderedbidict.py →
+#==============================================================================
+
+"""Provide :class:`FrozenOrderedBidict`, an immutable, hashable, ordered bidict."""
+
+import typing as _t
+
+from ._frozenbidict import frozenbidict
+from ._orderedbase import OrderedBidictBase
+from ._typing import KT, VT
+
+
+class FrozenOrderedBidict(OrderedBidictBase[KT, VT]):
+    """Hashable, immutable, ordered bidict type."""
+
+    __slots__ = ()
+    __hash__ = frozenbidict.__hash__
+
+    if _t.TYPE_CHECKING:
+        @property
+        def inverse(self) -> 'FrozenOrderedBidict[VT, KT]': ...
+
+    # Assume the Python implementation's dict type is ordered (e.g. PyPy or CPython >= 3.6), so we
+    # can delegate to `_fwdm` and `_invm` for faster implementations of several methods. Both
+    # `_fwdm` and `_invm` will always be initialized with the provided items in the correct order,
+    # and since `FrozenOrderedBidict` is immutable, their respective orders can't get out of sync
+    # after a mutation.
+    def __iter__(self) -> _t.Iterator[KT]:
+        """Iterator over the contained keys in insertion order."""
+        return self._iter()
+
+    def _iter(self, *, reverse: bool = False) -> _t.Iterator[KT]:
+        if reverse:
+            return super()._iter(reverse=True)
+        return iter(self._fwdm._fwdm)
+
+    def keys(self) -> _t.KeysView[KT]:
+        """A set-like object providing a view on the contained keys."""
+        return self._fwdm._fwdm.keys()
+
+    def values(self) -> _t.KeysView[VT]:  # type: ignore
+        """A set-like object providing a view on the contained values."""
+        return self._invm._fwdm.keys()
+
+    # We can't delegate for items because values in `_fwdm` are nodes.
+
+
+#                             * Code review nav *
+#==============================================================================
+#← Prev: _orderedbase.py  Current: _frozenordered.py  Next: _orderedbidict.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_iter.py
+++ b/matteo_env/Lib/site-packages/bidict/_iter.py
@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+"""Functions for iterating over items in a mapping."""
+
+import typing as _t
+from collections.abc import Mapping
+from itertools import chain, repeat
+
+from ._typing import KT, VT, IterItems, MapOrIterItems
+
+
+_NULL_IT = repeat(None, 0)  # repeat 0 times -> raise StopIteration from the start
+
+
+def _iteritems_mapping_or_iterable(arg: MapOrIterItems[KT, VT]) -> IterItems[KT, VT]:
+    """Yield the items in *arg*.
+
+    If *arg* is a :class:`~collections.abc.Mapping`, return an iterator over its items.
+    Otherwise return an iterator over *arg* itself.
+    """
+    return iter(arg.items() if isinstance(arg, Mapping) else arg)
+
+
+def _iteritems_args_kw(*args: MapOrIterItems[KT, VT], **kw: VT) -> IterItems[KT, VT]:
+    """Yield the items from the positional argument (if given) and then any from *kw*.
+
+    :raises TypeError: if more than one positional argument is given.
+    """
+    args_len = len(args)
+    if args_len > 1:
+        raise TypeError(f'Expected at most 1 positional argument, got {args_len}')
+    itemchain = None
+    if args:
+        arg = args[0]
+        if arg:
+            itemchain = _iteritems_mapping_or_iterable(arg)
+    if kw:
+        iterkw = iter(kw.items())
+        itemchain = chain(itemchain, iterkw) if itemchain else iterkw  # type: ignore
+    return itemchain or _NULL_IT  # type: ignore
+
+
+@_t.overload
+def inverted(arg: _t.Mapping[KT, VT]) -> IterItems[VT, KT]: ...
+@_t.overload
+def inverted(arg: IterItems[KT, VT]) -> IterItems[VT, KT]: ...
+def inverted(arg: MapOrIterItems[KT, VT]) -> IterItems[VT, KT]:
+    """Yield the inverse items of the provided object.
+
+    If *arg* has a :func:`callable` ``__inverted__`` attribute,
+    return the result of calling it.
+
+    Otherwise, return an iterator over the items in `arg`,
+    inverting each item on the fly.
+
+    *See also* :attr:`bidict.BidirectionalMapping.__inverted__`
+    """
+    inv = getattr(arg, '__inverted__', None)
+    if callable(inv):
+        return inv()  # type: ignore
+    return ((val, key) for (key, val) in _iteritems_mapping_or_iterable(arg))
--- a/matteo_env/Lib/site-packages/bidict/_mut.py
+++ b/matteo_env/Lib/site-packages/bidict/_mut.py
@ -0,0 +1,188 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: _frozenbidict.py    Current: _mut.py            Next: _bidict.py →
+#==============================================================================
+
+
+"""Provide :class:`MutableBidict`."""
+
+import typing as _t
+
+from ._abc import MutableBidirectionalMapping
+from ._base import BidictBase
+from ._dup import OnDup, ON_DUP_RAISE, ON_DUP_DROP_OLD
+from ._typing import _NONE, KT, VT, VDT, IterItems, MapOrIterItems
+
+
+class MutableBidict(BidictBase[KT, VT], MutableBidirectionalMapping[KT, VT]):
+    """Base class for mutable bidirectional mappings."""
+
+    __slots__ = ()
+
+    if _t.TYPE_CHECKING:
+        @property
+        def inverse(self) -> 'MutableBidict[VT, KT]': ...
+
+    def __delitem__(self, key: KT) -> None:
+        """*x.__delitem__(y)　⟺　del x[y]*"""
+        self._pop(key)
+
+    def __setitem__(self, key: KT, val: VT) -> None:
+        """Set the value for *key* to *val*.
+
+        If *key* is already associated with *val*, this is a no-op.
+
+        If *key* is already associated with a different value,
+        the old value will be replaced with *val*,
+        as with dict's :meth:`__setitem__`.
+
+        If *val* is already associated with a different key,
+        an exception is raised
+        to protect against accidental removal of the key
+        that's currently associated with *val*.
+
+        Use :meth:`put` instead if you want to specify different behavior in
+        the case that the provided key or value duplicates an existing one.
+        Or use :meth:`forceput` to unconditionally associate *key* with *val*,
+        replacing any existing items as necessary to preserve uniqueness.
+
+        :raises bidict.ValueDuplicationError: if *val* duplicates that of an
+            existing item.
+
+        :raises bidict.KeyAndValueDuplicationError: if *key* duplicates the key of an
+            existing item and *val* duplicates the value of a different
+            existing item.
+        """
+        self._put(key, val, self.on_dup)
+
+    def put(self, key: KT, val: VT, on_dup: OnDup = ON_DUP_RAISE) -> None:
+        """Associate *key* with *val*, honoring the :class:`OnDup` given in *on_dup*.
+
+        For example, if *on_dup* is :attr:`~bidict.ON_DUP_RAISE`,
+        then *key* will be associated with *val* if and only if
+        *key* is not already associated with an existing value and
+        *val* is not already associated with an existing key,
+        otherwise an exception will be raised.
+
+        If *key* is already associated with *val*, this is a no-op.
+
+        :raises bidict.KeyDuplicationError: if attempting to insert an item
+            whose key only duplicates an existing item's, and *on_dup.key* is
+            :attr:`~bidict.RAISE`.
+
+        :raises bidict.ValueDuplicationError: if attempting to insert an item
+            whose value only duplicates an existing item's, and *on_dup.val* is
+            :attr:`~bidict.RAISE`.
+
+        :raises bidict.KeyAndValueDuplicationError: if attempting to insert an
+            item whose key duplicates one existing item's, and whose value
+            duplicates another existing item's, and *on_dup.kv* is
+            :attr:`~bidict.RAISE`.
+        """
+        self._put(key, val, on_dup)
+
+    def forceput(self, key: KT, val: VT) -> None:
+        """Associate *key* with *val* unconditionally.
+
+        Replace any existing mappings containing key *key* or value *val*
+        as necessary to preserve uniqueness.
+        """
+        self._put(key, val, ON_DUP_DROP_OLD)
+
+    def clear(self) -> None:
+        """Remove all items."""
+        self._fwdm.clear()
+        self._invm.clear()
+
+    @_t.overload
+    def pop(self, key: KT) -> VT: ...
+    @_t.overload
+    def pop(self, key: KT, default: VDT = ...) -> VDT: ...
+    def pop(self, key: KT, default: VDT = _NONE) -> VDT:
+        """*x.pop(k[, d]) → v*
+
+        Remove specified key and return the corresponding value.
+
+        :raises KeyError: if *key* is not found and no *default* is provided.
+        """
+        try:
+            return self._pop(key)
+        except KeyError:
+            if default is _NONE:
+                raise
+            return default
+
+    def popitem(self) -> _t.Tuple[KT, VT]:
+        """*x.popitem() → (k, v)*
+
+        Remove and return some item as a (key, value) pair.
+
+        :raises KeyError: if *x* is empty.
+        """
+        if not self:
+            raise KeyError('mapping is empty')
+        key, val = self._fwdm.popitem()
+        del self._invm[val]
+        return key, val
+
+    @_t.overload
+    def update(self, __arg: _t.Mapping[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def update(self, __arg: IterItems[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def update(self, **kw: VT) -> None: ...
+    def update(self, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        """Like calling :meth:`putall` with *self.on_dup* passed for *on_dup*."""
+        if args or kw:
+            self._update(False, self.on_dup, *args, **kw)
+
+    @_t.overload
+    def forceupdate(self, __arg: _t.Mapping[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def forceupdate(self, __arg: IterItems[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def forceupdate(self, **kw: VT) -> None: ...
+    def forceupdate(self, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        """Like a bulk :meth:`forceput`."""
+        self._update(False, ON_DUP_DROP_OLD, *args, **kw)
+
+    @_t.overload
+    def putall(self, items: _t.Mapping[KT, VT], on_dup: OnDup) -> None: ...
+    @_t.overload
+    def putall(self, items: IterItems[KT, VT], on_dup: OnDup = ON_DUP_RAISE) -> None: ...
+    def putall(self, items: MapOrIterItems[KT, VT], on_dup: OnDup = ON_DUP_RAISE) -> None:
+        """Like a bulk :meth:`put`.
+
+        If one of the given items causes an exception to be raised,
+        none of the items is inserted.
+        """
+        if items:
+            self._update(False, on_dup, items)
+
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: _frozenbidict.py    Current: _mut.py            Next: _bidict.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_named.py
+++ b/matteo_env/Lib/site-packages/bidict/_named.py
@ -0,0 +1,99 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""Provide :func:`bidict.namedbidict`."""
+
+import typing as _t
+from sys import _getframe
+
+from ._abc import BidirectionalMapping, KT, VT
+from ._bidict import bidict
+
+
+def namedbidict(
+    typename: str,
+    keyname: str,
+    valname: str,
+    *,
+    base_type: _t.Type[BidirectionalMapping[KT, VT]] = bidict,
+) -> _t.Type[BidirectionalMapping[KT, VT]]:
+    r"""Create a new subclass of *base_type* with custom accessors.
+
+    Like :func:`collections.namedtuple` for bidicts.
+
+    The new class's ``__name__`` and ``__qualname__`` will be set to *typename*,
+    and its ``__module__`` will be set to the caller's module.
+
+    Instances of the new class will provide access to their
+    :attr:`inverse <BidirectionalMapping.inverse>` instances
+    via the custom *keyname*\_for property,
+    and access to themselves
+    via the custom *valname*\_for property.
+
+    *See also* the :ref:`namedbidict usage documentation
+    <other-bidict-types:\:func\:\`~bidict.namedbidict\`>`
+
+    :raises ValueError: if any of the *typename*, *keyname*, or *valname*
+        strings is not a valid Python identifier, or if *keyname == valname*.
+
+    :raises TypeError: if *base_type* is not a :class:`BidirectionalMapping` subclass
+        that provides ``_isinv`` and :meth:`~object.__getstate__` attributes.
+        (Any :class:`~bidict.BidictBase` subclass can be passed in, including all the
+        concrete bidict types pictured in the :ref:`other-bidict-types:Bidict Types Diagram`.
+    """
+    if not issubclass(base_type, BidirectionalMapping) or not all(hasattr(base_type, i) for i in ('_isinv', '__getstate__')):
+        raise TypeError(base_type)
+    names = (typename, keyname, valname)
+    if not all(map(str.isidentifier, names)) or keyname == valname:
+        raise ValueError(names)
+
+    class _Named(base_type):  # type: ignore
+
+        __slots__ = ()
+
+        def _getfwd(self) -> '_Named':
+            return self.inverse if self._isinv else self  # type: ignore
+
+        def _getinv(self) -> '_Named':
+            return self if self._isinv else self.inverse  # type: ignore
+
+        @property
+        def _keyname(self) -> str:
+            return valname if self._isinv else keyname
+
+        @property
+        def _valname(self) -> str:
+            return keyname if self._isinv else valname
+
+        def __reduce__(self) -> '_t.Tuple[_t.Callable[[str, str, str, _t.Type[BidirectionalMapping]], BidirectionalMapping], _t.Tuple[str, str, str, _t.Type[BidirectionalMapping]], dict]':
+            return (_make_empty, (typename, keyname, valname, base_type), self.__getstate__())
+
+    bname = base_type.__name__
+    fname = valname + '_for'
+    iname = keyname + '_for'
+    fdoc = f'{typename} forward {bname}: {keyname} → {valname}'
+    idoc = f'{typename} inverse {bname}: {valname} → {keyname}'
+    setattr(_Named, fname, property(_Named._getfwd, doc=fdoc))
+    setattr(_Named, iname, property(_Named._getinv, doc=idoc))
+
+    _Named.__name__ = typename
+    _Named.__qualname__ = typename
+    _Named.__module__ = _getframe(1).f_globals.get('__name__')  # type: ignore
+    return _Named
+
+
+def _make_empty(
+    typename: str,
+    keyname: str,
+    valname: str,
+    base_type: _t.Type[BidirectionalMapping] = bidict,
+) -> BidirectionalMapping:
+    """Create a named bidict with the indicated arguments and return an empty instance.
+    Used to make :func:`bidict.namedbidict` instances picklable.
+    """
+    cls = namedbidict(typename, keyname, valname, base_type=base_type)
+    return cls()
--- a/matteo_env/Lib/site-packages/bidict/_orderedbase.py
+++ b/matteo_env/Lib/site-packages/bidict/_orderedbase.py
@ -0,0 +1,314 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+# ← Prev: _bidict.py       Current: _orderedbase.py   Next: _frozenordered.py →
+#==============================================================================
+
+
+"""Provide :class:`OrderedBidictBase`."""
+
+import typing as _t
+from copy import copy
+from weakref import ref
+
+from ._base import _NONE, _DedupResult, _WriteResult, BidictBase, BT
+from ._bidict import bidict
+from ._typing import KT, VT, IterItems, MapOrIterItems
+
+
+class _Node:
+    """A node in a circular doubly-linked list
+    used to encode the order of items in an ordered bidict.
+
+    Only weak references to the next and previous nodes
+    are held to avoid creating strong reference cycles.
+
+    Because an ordered bidict retains two strong references
+    to each node instance (one from its backing `_fwdm` mapping
+    and one from its `_invm` mapping), a node's refcount will not
+    drop to zero (and so will not be garbage collected) as long as
+    the ordered bidict that contains it is still alive.
+    Because nodes don't have strong reference cycles,
+    once their containing bidict is freed,
+    they too are immediately freed.
+    """
+
+    __slots__ = ('_prv', '_nxt', '__weakref__')
+
+    def __init__(self, prv: '_Node' = None, nxt: '_Node' = None) -> None:
+        self._setprv(prv)
+        self._setnxt(nxt)
+
+    def __repr__(self) -> str:
+        clsname = self.__class__.__name__
+        prv = id(self.prv)
+        nxt = id(self.nxt)
+        return f'{clsname}(prv={prv}, self={id(self)}, nxt={nxt})'
+
+    def _getprv(self) -> '_t.Optional[_Node]':
+        return self._prv() if isinstance(self._prv, ref) else self._prv
+
+    def _setprv(self, prv: '_t.Optional[_Node]') -> None:
+        self._prv = prv and ref(prv)
+
+    prv = property(_getprv, _setprv)
+
+    def _getnxt(self) -> '_t.Optional[_Node]':
+        return self._nxt() if isinstance(self._nxt, ref) else self._nxt
+
+    def _setnxt(self, nxt: '_t.Optional[_Node]') -> None:
+        self._nxt = nxt and ref(nxt)
+
+    nxt = property(_getnxt, _setnxt)
+
+    def __getstate__(self) -> dict:
+        """Return the instance state dictionary
+        but with weakrefs converted to strong refs
+        so that it can be pickled.
+
+        *See also* :meth:`object.__getstate__`
+        """
+        return dict(_prv=self.prv, _nxt=self.nxt)
+
+    def __setstate__(self, state: dict) -> None:
+        """Set the instance state from *state*."""
+        self._setprv(state['_prv'])
+        self._setnxt(state['_nxt'])
+
+
+class _SentinelNode(_Node):
+    """Special node in a circular doubly-linked list
+    that links the first node with the last node.
+    When its next and previous references point back to itself
+    it represents an empty list.
+    """
+
+    __slots__ = ()
+
+    def __init__(self, prv: _Node = None, nxt: _Node = None) -> None:
+        super().__init__(prv or self, nxt or self)
+
+    def __repr__(self) -> str:
+        return '<SNTL>'
+
+    def __bool__(self) -> bool:
+        return False
+
+    def _iter(self, *, reverse: bool = False) -> _t.Iterator[_Node]:
+        """Iterator yielding nodes in the requested order,
+        i.e. traverse the linked list via :attr:`nxt`
+        (or :attr:`prv` if *reverse* is truthy)
+        until reaching a falsy (i.e. sentinel) node.
+        """
+        attr = 'prv' if reverse else 'nxt'
+        node = getattr(self, attr)
+        while node:
+            yield node
+            node = getattr(node, attr)
+
+
+class OrderedBidictBase(BidictBase[KT, VT]):
+    """Base class implementing an ordered :class:`BidirectionalMapping`."""
+
+    __slots__ = ('_sntl',)
+
+    _fwdm_cls = bidict  # type: ignore
+    _invm_cls = bidict  # type: ignore
+
+    #: The object used by :meth:`__repr__` for printing the contained items.
+    _repr_delegate = list  # type: ignore
+
+    @_t.overload
+    def __init__(self, __arg: _t.Mapping[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def __init__(self, __arg: IterItems[KT, VT], **kw: VT) -> None: ...
+    @_t.overload
+    def __init__(self, **kw: VT) -> None: ...
+    def __init__(self, *args: MapOrIterItems[KT, VT], **kw: VT) -> None:
+        """Make a new ordered bidirectional mapping.
+        The signature behaves like that of :class:`dict`.
+        Items passed in are added in the order they are passed,
+        respecting the :attr:`on_dup` class attribute in the process.
+
+        The order in which items are inserted is remembered,
+        similar to :class:`collections.OrderedDict`.
+        """
+        self._sntl = _SentinelNode()
+
+        # Like unordered bidicts, ordered bidicts also store two backing one-directional mappings
+        # `_fwdm` and `_invm`. But rather than mapping `key` to `val` and `val` to `key`
+        # (respectively), they map `key` to `nodefwd` and `val` to `nodeinv` (respectively), where
+        # `nodefwd` is `nodeinv` when `key` and `val` are associated with one another.
+
+        # To effect this difference, `_write_item` and `_undo_write` are overridden. But much of the
+        # rest of BidictBase's implementation, including BidictBase.__init__ and BidictBase._update,
+        # are inherited and are able to be reused without modification.
+        super().__init__(*args, **kw)
+
+    if _t.TYPE_CHECKING:
+        @property
+        def inverse(self) -> 'OrderedBidictBase[VT, KT]': ...
+        _fwdm: bidict[KT, _Node]  # type: ignore
+        _invm: bidict[VT, _Node]  # type: ignore
+
+    def _init_inv(self) -> None:
+        super()._init_inv()
+        self.inverse._sntl = self._sntl
+
+    # Can't reuse BidictBase.copy since ordered bidicts have different internal structure.
+    def copy(self: BT) -> BT:
+        """A shallow copy of this ordered bidict."""
+        # Fast copy implementation bypassing __init__. See comments in :meth:`BidictBase.copy`.
+        cp = self.__class__.__new__(self.__class__)
+        sntl = _SentinelNode()
+        fwdm = copy(self._fwdm)
+        invm = copy(self._invm)
+        cur = sntl
+        nxt = sntl.nxt
+        for (key, val) in self.items():
+            nxt = _Node(cur, sntl)
+            cur.nxt = fwdm[key] = invm[val] = nxt
+            cur = nxt
+        sntl.prv = nxt
+        cp._sntl = sntl
+        cp._fwdm = fwdm
+        cp._invm = invm
+        cp._init_inv()
+        return cp  # type: ignore
+
+    __copy__ = copy
+
+    def __getitem__(self, key: KT) -> VT:
+        nodefwd = self._fwdm[key]
+        val = self._invm.inverse[nodefwd]
+        return val
+
+    def _pop(self, key: KT) -> VT:
+        nodefwd = self._fwdm.pop(key)
+        val = self._invm.inverse.pop(nodefwd)
+        nodefwd.prv.nxt = nodefwd.nxt
+        nodefwd.nxt.prv = nodefwd.prv
+        return val
+
+    @staticmethod
+    def _already_have(key: KT, val: VT, nodeinv: _Node, nodefwd: _Node) -> bool:  # type: ignore
+        # Overrides _base.BidictBase.
+        return nodeinv is nodefwd
+
+    def _write_item(self, key: KT, val: VT, dedup_result: _DedupResult) -> _WriteResult:
+        # Overrides _base.BidictBase.
+        fwdm = self._fwdm  # bidict mapping keys to nodes
+        invm = self._invm  # bidict mapping vals to nodes
+        isdupkey, isdupval, nodeinv, nodefwd = dedup_result
+        if not isdupkey and not isdupval:
+            # No key or value duplication -> create and append a new node.
+            sntl = self._sntl
+            last = sntl.prv
+            node = _Node(last, sntl)
+            last.nxt = sntl.prv = fwdm[key] = invm[val] = node
+            oldkey = oldval = _NONE
+        elif isdupkey and isdupval:
+            # Key and value duplication across two different nodes.
+            assert nodefwd is not nodeinv
+            oldval = invm.inverse[nodefwd]  # type: ignore
+            oldkey = fwdm.inverse[nodeinv]  # type: ignore
+            assert oldkey != key
+            assert oldval != val
+            # We have to collapse nodefwd and nodeinv into a single node, i.e. drop one of them.
+            # Drop nodeinv, so that the item with the same key is the one overwritten in place.
+            nodeinv.prv.nxt = nodeinv.nxt
+            nodeinv.nxt.prv = nodeinv.prv
+            # Don't remove nodeinv's references to its neighbors since
+            # if the update fails, we'll need them to undo this write.
+            # Update fwdm and invm.
+            tmp = fwdm.pop(oldkey)  # type: ignore
+            assert tmp is nodeinv
+            tmp = invm.pop(oldval)  # type: ignore
+            assert tmp is nodefwd
+            fwdm[key] = invm[val] = nodefwd
+        elif isdupkey:
+            oldval = invm.inverse[nodefwd]  # type: ignore
+            oldkey = _NONE
+            oldnodeinv = invm.pop(oldval)  # type: ignore
+            assert oldnodeinv is nodefwd
+            invm[val] = nodefwd
+        else:  # isdupval
+            oldkey = fwdm.inverse[nodeinv]  # type: ignore
+            oldval = _NONE
+            oldnodefwd = fwdm.pop(oldkey)  # type: ignore
+            assert oldnodefwd is nodeinv
+            fwdm[key] = nodeinv
+        return _WriteResult(key, val, oldkey, oldval)
+
+    def _undo_write(self, dedup_result: _DedupResult, write_result: _WriteResult) -> None:
+        fwdm = self._fwdm
+        invm = self._invm
+        isdupkey, isdupval, nodeinv, nodefwd = dedup_result
+        key, val, oldkey, oldval = write_result
+        if not isdupkey and not isdupval:
+            self._pop(key)
+        elif isdupkey and isdupval:
+            # Restore original items.
+            nodeinv.prv.nxt = nodeinv.nxt.prv = nodeinv
+            fwdm[oldkey] = invm[val] = nodeinv
+            invm[oldval] = fwdm[key] = nodefwd
+        elif isdupkey:
+            tmp = invm.pop(val)
+            assert tmp is nodefwd
+            invm[oldval] = nodefwd
+            assert fwdm[key] is nodefwd
+        else:  # isdupval
+            tmp = fwdm.pop(key)
+            assert tmp is nodeinv
+            fwdm[oldkey] = nodeinv
+            assert invm[val] is nodeinv
+
+    def __iter__(self) -> _t.Iterator[KT]:
+        """Iterator over the contained keys in insertion order."""
+        return self._iter()
+
+    def _iter(self, *, reverse: bool = False) -> _t.Iterator[KT]:
+        fwdm_inv = self._fwdm.inverse
+        for node in self._sntl._iter(reverse=reverse):
+            yield fwdm_inv[node]
+
+    def __reversed__(self) -> _t.Iterator[KT]:
+        """Iterator over the contained keys in reverse insertion order."""
+        yield from self._iter(reverse=True)
+
+    def equals_order_sensitive(self, other: object) -> bool:
+        """Order-sensitive equality check.
+
+        *See also* :ref:`eq-order-insensitive`
+        """
+        # Same short-circuit as BidictBase.__eq__. Factoring out not worth function call overhead.
+        if not isinstance(other, _t.Mapping) or len(self) != len(other):
+            return False
+        return all(i == j for (i, j) in zip(self.items(), other.items()))
+
+
+#                             * Code review nav *
+#==============================================================================
+# ← Prev: _bidict.py       Current: _orderedbase.py   Next: _frozenordered.py →
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_orderedbidict.py
+++ b/matteo_env/Lib/site-packages/bidict/_orderedbidict.py
@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+#==============================================================================
+#                    * Welcome to the bidict source code *
+#==============================================================================
+
+# Doing a code review? You'll find a "Code review nav" comment like the one
+# below at the top and bottom of the most important source files. This provides
+# a suggested initial path through the source when reviewing.
+#
+# Note: If you aren't reading this on https://github.com/jab/bidict, you may be
+# viewing an outdated version of the code. Please head to GitHub to review the
+# latest version, which contains important improvements over older versions.
+#
+# Thank you for reading and for any feedback you provide.
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: _frozenordered.py  Current: _orderedbidict.py                <FIN>
+#==============================================================================
+
+
+"""Provide :class:`OrderedBidict`."""
+
+import typing as _t
+
+from ._mut import MutableBidict
+from ._orderedbase import OrderedBidictBase
+from ._typing import KT, VT
+
+
+class OrderedBidict(OrderedBidictBase[KT, VT], MutableBidict[KT, VT]):
+    """Mutable bidict type that maintains items in insertion order."""
+
+    __slots__ = ()
+
+    if _t.TYPE_CHECKING:
+        @property
+        def inverse(self) -> 'OrderedBidict[VT, KT]': ...
+
+    def clear(self) -> None:
+        """Remove all items."""
+        self._fwdm.clear()
+        self._invm.clear()
+        self._sntl.nxt = self._sntl.prv = self._sntl
+
+    def popitem(self, last: bool = True) -> _t.Tuple[KT, VT]:
+        """*x.popitem() → (k, v)*
+
+        Remove and return the most recently added item as a (key, value) pair
+        if *last* is True, else the least recently added item.
+
+        :raises KeyError: if *x* is empty.
+        """
+        if not self:
+            raise KeyError('mapping is empty')
+        key = next((reversed if last else iter)(self))  # type: ignore
+        val = self._pop(key)
+        return key, val
+
+    def move_to_end(self, key: KT, last: bool = True) -> None:
+        """Move an existing key to the beginning or end of this ordered bidict.
+
+        The item is moved to the end if *last* is True, else to the beginning.
+
+        :raises KeyError: if the key does not exist
+        """
+        node = self._fwdm[key]
+        node.prv.nxt = node.nxt
+        node.nxt.prv = node.prv
+        sntl = self._sntl
+        if last:
+            lastnode = sntl.prv
+            node.prv = lastnode
+            node.nxt = sntl
+            sntl.prv = lastnode.nxt = node
+        else:
+            firstnode = sntl.nxt
+            node.prv = sntl
+            node.nxt = firstnode
+            sntl.nxt = firstnode.prv = node
+
+
+#                             * Code review nav *
+#==============================================================================
+#  ← Prev: _frozenordered.py  Current: _orderedbidict.py                <FIN>
+#==============================================================================
--- a/matteo_env/Lib/site-packages/bidict/_typing.py
+++ b/matteo_env/Lib/site-packages/bidict/_typing.py
@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+"""Provide typing-related objects."""
+
+import typing as _t
+
+
+KT = _t.TypeVar('KT')
+VT = _t.TypeVar('VT')
+IterItems = _t.Iterable[_t.Tuple[KT, VT]]
+MapOrIterItems = _t.Union[_t.Mapping[KT, VT], IterItems[KT, VT]]
+
+DT = _t.TypeVar('DT')   #: for default arguments
+VDT = _t.Union[VT, DT]
+
+
+class _BareReprMeta(type):
+    def __repr__(cls) -> str:
+        return f'<{cls.__name__}>'
+
+
+class _NONE(metaclass=_BareReprMeta):
+    """Sentinel type used to represent 'missing'."""
+
+
+OKT = _t.Union[KT, _NONE]    #: optional key type
+OVT = _t.Union[VT, _NONE]    #: optional value type
--- a/matteo_env/Lib/site-packages/bidict/_version.py
+++ b/matteo_env/Lib/site-packages/bidict/_version.py
@ -0,0 +1,4 @@
+# coding: utf-8
+# file generated by setuptools_scm
+# don't change, don't track in version control
+version = '0.21.2'
--- a/matteo_env/Lib/site-packages/bidict/metadata.py
+++ b/matteo_env/Lib/site-packages/bidict/metadata.py
@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+# Copyright 2009-2020 Joshua Bronson. All Rights Reserved.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""Define bidict package metadata."""
+
+
+# _version.py is generated by setuptools_scm (via its `write_to` param, see setup.py)
+try:
+    from ._version import version
+except (ImportError, ValueError, SystemError):  # pragma: no cover
+    try:
+        import pkg_resources
+    except ImportError:
+        __version__ = '0.0.0.VERSION_NOT_FOUND'
+    else:
+        try:
+            __version__ = pkg_resources.get_distribution('bidict').version
+        except pkg_resources.DistributionNotFound:
+            __version__ = '0.0.0.VERSION_NOT_FOUND'
+else:  # pragma: no cover
+    __version__ = version
+
+try:
+    __version_info__ = tuple(int(p) if i < 3 else p for (i, p) in enumerate(__version__.split('.')))
+except Exception:  # pragma: no cover
+    __vesion_info__ = (0, 0, 0, f'PARSE FAILURE: __version__={__version__!r}')
+
+__author__ = 'Joshua Bronson'
+__maintainer__ = 'Joshua Bronson'
+__copyright__ = 'Copyright 2009-2020 Joshua Bronson'
+__email__ = 'jabronson@gmail.com'
+
+# See: ../docs/thanks.rst
+__credits__ = [i.strip() for i in """
+Joshua Bronson, Michael Arntzenius, Francis Carr, Gregory Ewing, Raymond Hettinger, Jozef Knaperek,
+Daniel Pope, Terry Reedy, David Turner, Tom Viner, Richard Sanger, Zeyi Wang
+""".split(',')]
+
+__description__ = 'The bidirectional mapping library for Python.'
+__keywords__ = 'dict dictionary mapping datastructure bimap bijection bijective ' \
+    'injective inverse reverse bidirectional two-way 2-way'
+
+__license__ = 'MPL 2.0'
+__status__ = 'Beta'
+__url__ = 'https://bidict.readthedocs.io'
--- a/matteo_env/Lib/site-packages/bidict/py.typed
+++ b/matteo_env/Lib/site-packages/bidict/py.typed
--- a/matteo_env/Lib/site-packages/click-7.1.2.dist-info/INSTALLER
+++ b/matteo_env/Lib/site-packages/click-7.1.2.dist-info/INSTALLER
@ -0,0 +1 @@
+pip
--- a/matteo_env/Lib/site-packages/click-7.1.2.dist-info/LICENSE.rst
+++ b/matteo_env/Lib/site-packages/click-7.1.2.dist-info/LICENSE.rst
@ -0,0 +1,28 @@
+Copyright 2014 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/matteo_env/Lib/site-packages/click-7.1.2.dist-info/METADATA
+++ b/matteo_env/Lib/site-packages/click-7.1.2.dist-info/METADATA
@ -0,0 +1,102 @@
+Metadata-Version: 2.1
+Name: click
+Version: 7.1.2
+Summary: Composable command line interface toolkit
+Home-page: https://palletsprojects.com/p/click/
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://click.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/click
+Project-URL: Issue tracker, https://github.com/pallets/click/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 3
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+
+\$ click\_
+==========
+
+Click is a Python package for creating beautiful command line interfaces
+in a composable way with as little code as necessary. It's the "Command
+Line Interface Creation Kit". It's highly configurable but comes with
+sensible defaults out of the box.
+
+It aims to make the process of writing command line tools quick and fun
+while also preventing any frustration caused by the inability to
+implement an intended CLI API.
+
+Click in three points:
+
+-   Arbitrary nesting of commands
+-   Automatic help page generation
+-   Supports lazy loading of subcommands at runtime
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    $ pip install -U click
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    import click
+
+    @click.command()
+    @click.option("--count", default=1, help="Number of greetings.")
+    @click.option("--name", prompt="Your name", help="The person to greet.")
+    def hello(count, name):
+        """Simple program that greets NAME for a total of COUNT times."""
+        for _ in range(count):
+            click.echo(f"Hello, {name}!")
+
+    if __name__ == '__main__':
+        hello()
+
+.. code-block:: text
+
+    $ python hello.py --count=3
+    Your name: Click
+    Hello, Click!
+    Hello, Click!
+    Hello, Click!
+
+
+Donate
+------
+
+The Pallets organization develops and supports Click and other popular
+packages. In order to grow the community of contributors and users, and
+allow the maintainers to devote more time to the projects, `please
+donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+-   Website: https://palletsprojects.com/p/click/
+-   Documentation: https://click.palletsprojects.com/
+-   Releases: https://pypi.org/project/click/
+-   Code: https://github.com/pallets/click
+-   Issue tracker: https://github.com/pallets/click/issues
+-   Test status: https://dev.azure.com/pallets/click/_build
+-   Official chat: https://discord.gg/t6rrQZH
+
+
--- a/matteo_env/Lib/site-packages/click-7.1.2.dist-info/RECORD
+++ b/matteo_env/Lib/site-packages/click-7.1.2.dist-info/RECORD
@ -0,0 +1,40 @@
+click-7.1.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+click-7.1.2.dist-info/LICENSE.rst,sha256=morRBqOU6FO_4h9C9OctWSgZoigF2ZG18ydQKSkrZY0,1475
+click-7.1.2.dist-info/METADATA,sha256=LrRgakZKV7Yg3qJqX_plu2WhFW81MzP3EqQmZhHIO8M,2868
+click-7.1.2.dist-info/RECORD,,
+click-7.1.2.dist-info/WHEEL,sha256=kGT74LWyRUZrL4VgLh6_g12IeVl_9u9ZVhadrgXZUEY,110
+click-7.1.2.dist-info/top_level.txt,sha256=J1ZQogalYS4pphY_lPECoNMfw0HzTSrZglC4Yfwo4xA,6
+click/__init__.py,sha256=FkyGDQ-cbiQxP_lxgUspyFYS48f2S_pTcfKPz-d_RMo,2463
+click/__pycache__/__init__.cpython-38.pyc,,
+click/__pycache__/_bashcomplete.cpython-38.pyc,,
+click/__pycache__/_compat.cpython-38.pyc,,
+click/__pycache__/_termui_impl.cpython-38.pyc,,
+click/__pycache__/_textwrap.cpython-38.pyc,,
+click/__pycache__/_unicodefun.cpython-38.pyc,,
+click/__pycache__/_winconsole.cpython-38.pyc,,
+click/__pycache__/core.cpython-38.pyc,,
+click/__pycache__/decorators.cpython-38.pyc,,
+click/__pycache__/exceptions.cpython-38.pyc,,
+click/__pycache__/formatting.cpython-38.pyc,,
+click/__pycache__/globals.cpython-38.pyc,,
+click/__pycache__/parser.cpython-38.pyc,,
+click/__pycache__/termui.cpython-38.pyc,,
+click/__pycache__/testing.cpython-38.pyc,,
+click/__pycache__/types.cpython-38.pyc,,
+click/__pycache__/utils.cpython-38.pyc,,
+click/_bashcomplete.py,sha256=9J98IHQYmCAr2Jup6TDshUr5FJEen-AoQCZR0K5nKxQ,12309
+click/_compat.py,sha256=AoMaYnZ-3pwtNXuHtlb6_UXsayoG0QZiHKIRy2VFezc,24169
+click/_termui_impl.py,sha256=yNktUMAdjYOU1HMkq915jR3zgAzUNtGSQqSTSSMn3eQ,20702
+click/_textwrap.py,sha256=ajCzkzFly5tjm9foQ5N9_MOeaYJMBjAltuFa69n4iXY,1197
+click/_unicodefun.py,sha256=apLSNEBZgUsQNPMUv072zJ1swqnm0dYVT5TqcIWTt6w,4201
+click/_winconsole.py,sha256=6YDu6Rq1Wxx4w9uinBMK2LHvP83aerZM9GQurlk3QDo,10010
+click/core.py,sha256=V6DJzastGhrC6WTDwV9MSLwcJUdX2Uf1ypmgkjBdn_Y,77650
+click/decorators.py,sha256=3TvEO_BkaHl7k6Eh1G5eC7JK4LKPdpFqH9JP0QDyTlM,11215
+click/exceptions.py,sha256=3pQAyyMFzx5A3eV0Y27WtDTyGogZRbrC6_o5DjjKBbw,8118
+click/formatting.py,sha256=Wb4gqFEpWaKPgAbOvnkCl8p-bEZx5KpM5ZSByhlnJNk,9281
+click/globals.py,sha256=ht7u2kUGI08pAarB4e4yC8Lkkxy6gJfRZyzxEj8EbWQ,1501
+click/parser.py,sha256=mFK-k58JtPpqO0AC36WAr0t5UfzEw1mvgVSyn7WCe9M,15691
+click/termui.py,sha256=G7QBEKIepRIGLvNdGwBTYiEtSImRxvTO_AglVpyHH2s,23998
+click/testing.py,sha256=EUEsDUqNXFgCLhZ0ZFOROpaVDA5I_rijwnNPE6qICgA,12854
+click/types.py,sha256=wuubik4VqgqAw5dvbYFkDt-zSAx97y9TQXuXcVaRyQA,25045
+click/utils.py,sha256=4VEcJ7iEHwjnFuzEuRtkT99o5VG3zqSD7Q2CVzv13WU,15940
--- a/matteo_env/Lib/site-packages/click-7.1.2.dist-info/WHEEL
+++ b/matteo_env/Lib/site-packages/click-7.1.2.dist-info/WHEEL
@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
--- a/matteo_env/Lib/site-packages/click-7.1.2.dist-info/top_level.txt
+++ b/matteo_env/Lib/site-packages/click-7.1.2.dist-info/top_level.txt
@ -0,0 +1 @@
+click
--- a/matteo_env/Lib/site-packages/click/init.py
+++ b/matteo_env/Lib/site-packages/click/init.py
@ -0,0 +1,79 @@
+"""
+Click is a simple Python module inspired by the stdlib optparse to make
+writing command line scripts fun. Unlike other modules, it's based
+around a simple API that does not come with too much magic and is
+composable.
+"""
+from .core import Argument
+from .core import BaseCommand
+from .core import Command
+from .core import CommandCollection
+from .core import Context
+from .core import Group
+from .core import MultiCommand
+from .core import Option
+from .core import Parameter
+from .decorators import argument
+from .decorators import command
+from .decorators import confirmation_option
+from .decorators import group
+from .decorators import help_option
+from .decorators import make_pass_decorator
+from .decorators import option
+from .decorators import pass_context
+from .decorators import pass_obj
+from .decorators import password_option
+from .decorators import version_option
+from .exceptions import Abort
+from .exceptions import BadArgumentUsage
+from .exceptions import BadOptionUsage
+from .exceptions import BadParameter
+from .exceptions import ClickException
+from .exceptions import FileError
+from .exceptions import MissingParameter
+from .exceptions import NoSuchOption
+from .exceptions import UsageError
+from .formatting import HelpFormatter
+from .formatting import wrap_text
+from .globals import get_current_context
+from .parser import OptionParser
+from .termui import clear
+from .termui import confirm
+from .termui import echo_via_pager
+from .termui import edit
+from .termui import get_terminal_size
+from .termui import getchar
+from .termui import launch
+from .termui import pause
+from .termui import progressbar
+from .termui import prompt
+from .termui import secho
+from .termui import style
+from .termui import unstyle
+from .types import BOOL
+from .types import Choice
+from .types import DateTime
+from .types import File
+from .types import FLOAT
+from .types import FloatRange
+from .types import INT
+from .types import IntRange
+from .types import ParamType
+from .types import Path
+from .types import STRING
+from .types import Tuple
+from .types import UNPROCESSED
+from .types import UUID
+from .utils import echo
+from .utils import format_filename
+from .utils import get_app_dir
+from .utils import get_binary_stream
+from .utils import get_os_args
+from .utils import get_text_stream
+from .utils import open_file
+
+# Controls if click should emit the warning about the use of unicode
+# literals.
+disable_unicode_literals_warning = False
+
+__version__ = "7.1.2"
--- a/matteo_env/Lib/site-packages/click/_bashcomplete.py
+++ b/matteo_env/Lib/site-packages/click/_bashcomplete.py
@ -0,0 +1,375 @@
+import copy
+import os
+import re
+
+from .core import Argument
+from .core import MultiCommand
+from .core import Option
+from .parser import split_arg_string
+from .types import Choice
+from .utils import echo
+
+try:
+    from collections import abc
+except ImportError:
+    import collections as abc
+
+WORDBREAK = "="
+
+# Note, only BASH version 4.4 and later have the nosort option.
+COMPLETION_SCRIPT_BASH = """
+%(complete_func)s() {
+    local IFS=$'\n'
+    COMPREPLY=( $( env COMP_WORDS="${COMP_WORDS[*]}" \\
+                   COMP_CWORD=$COMP_CWORD \\
+                   %(autocomplete_var)s=complete $1 ) )
+    return 0
+}
+
+%(complete_func)setup() {
+    local COMPLETION_OPTIONS=""
+    local BASH_VERSION_ARR=(${BASH_VERSION//./ })
+    # Only BASH version 4.4 and later have the nosort option.
+    if [ ${BASH_VERSION_ARR[0]} -gt 4 ] || ([ ${BASH_VERSION_ARR[0]} -eq 4 ] \
+&& [ ${BASH_VERSION_ARR[1]} -ge 4 ]); then
+        COMPLETION_OPTIONS="-o nosort"
+    fi
+
+    complete $COMPLETION_OPTIONS -F %(complete_func)s %(script_names)s
+}
+
+%(complete_func)setup
+"""
+
+COMPLETION_SCRIPT_ZSH = """
+#compdef %(script_names)s
+
+%(complete_func)s() {
+    local -a completions
+    local -a completions_with_descriptions
+    local -a response
+    (( ! $+commands[%(script_names)s] )) && return 1
+
+    response=("${(@f)$( env COMP_WORDS=\"${words[*]}\" \\
+                        COMP_CWORD=$((CURRENT-1)) \\
+                        %(autocomplete_var)s=\"complete_zsh\" \\
+                        %(script_names)s )}")
+
+    for key descr in ${(kv)response}; do
+      if [[ "$descr" == "_" ]]; then
+          completions+=("$key")
+      else
+          completions_with_descriptions+=("$key":"$descr")
+      fi
+    done
+
+    if [ -n "$completions_with_descriptions" ]; then
+        _describe -V unsorted completions_with_descriptions -U
+    fi
+
+    if [ -n "$completions" ]; then
+        compadd -U -V unsorted -a completions
+    fi
+    compstate[insert]="automenu"
+}
+
+compdef %(complete_func)s %(script_names)s
+"""
+
+COMPLETION_SCRIPT_FISH = (
+    "complete --no-files --command %(script_names)s --arguments"
+    ' "(env %(autocomplete_var)s=complete_fish'
+    " COMP_WORDS=(commandline -cp) COMP_CWORD=(commandline -t)"
+    ' %(script_names)s)"'
+)
+
+_completion_scripts = {
+    "bash": COMPLETION_SCRIPT_BASH,
+    "zsh": COMPLETION_SCRIPT_ZSH,
+    "fish": COMPLETION_SCRIPT_FISH,
+}
+
+_invalid_ident_char_re = re.compile(r"[^a-zA-Z0-9_]")
+
+
+def get_completion_script(prog_name, complete_var, shell):
+    cf_name = _invalid_ident_char_re.sub("", prog_name.replace("-", "_"))
+    script = _completion_scripts.get(shell, COMPLETION_SCRIPT_BASH)
+    return (
+        script
+        % {
+            "complete_func": "_{}_completion".format(cf_name),
+            "script_names": prog_name,
+            "autocomplete_var": complete_var,
+        }
+    ).strip() + ";"
+
+
+def resolve_ctx(cli, prog_name, args):
+    """Parse into a hierarchy of contexts. Contexts are connected
+    through the parent variable.
+
+    :param cli: command definition
+    :param prog_name: the program that is running
+    :param args: full list of args
+    :return: the final context/command parsed
+    """
+    ctx = cli.make_context(prog_name, args, resilient_parsing=True)
+    args = ctx.protected_args + ctx.args
+    while args:
+        if isinstance(ctx.command, MultiCommand):
+            if not ctx.command.chain:
+                cmd_name, cmd, args = ctx.command.resolve_command(ctx, args)
+                if cmd is None:
+                    return ctx
+                ctx = cmd.make_context(
+                    cmd_name, args, parent=ctx, resilient_parsing=True
+                )
+                args = ctx.protected_args + ctx.args
+            else:
+                # Walk chained subcommand contexts saving the last one.
+                while args:
+                    cmd_name, cmd, args = ctx.command.resolve_command(ctx, args)
+                    if cmd is None:
+                        return ctx
+                    sub_ctx = cmd.make_context(
+                        cmd_name,
+                        args,
+                        parent=ctx,
+                        allow_extra_args=True,
+                        allow_interspersed_args=False,
+                        resilient_parsing=True,
+                    )
+                    args = sub_ctx.args
+                ctx = sub_ctx
+                args = sub_ctx.protected_args + sub_ctx.args
+        else:
+            break
+    return ctx
+
+
+def start_of_option(param_str):
+    """
+    :param param_str: param_str to check
+    :return: whether or not this is the start of an option declaration
+        (i.e. starts "-" or "--")
+    """
+    return param_str and param_str[:1] == "-"
+
+
+def is_incomplete_option(all_args, cmd_param):
+    """
+    :param all_args: the full original list of args supplied
+    :param cmd_param: the current command paramter
+    :return: whether or not the last option declaration (i.e. starts
+        "-" or "--") is incomplete and corresponds to this cmd_param. In
+        other words whether this cmd_param option can still accept
+        values
+    """
+    if not isinstance(cmd_param, Option):
+        return False
+    if cmd_param.is_flag:
+        return False
+    last_option = None
+    for index, arg_str in enumerate(
+        reversed([arg for arg in all_args if arg != WORDBREAK])
+    ):
+        if index + 1 > cmd_param.nargs:
+            break
+        if start_of_option(arg_str):
+            last_option = arg_str
+
+    return True if last_option and last_option in cmd_param.opts else False
+
+
+def is_incomplete_argument(current_params, cmd_param):
+    """
+    :param current_params: the current params and values for this
+        argument as already entered
+    :param cmd_param: the current command parameter
+    :return: whether or not the last argument is incomplete and
+        corresponds to this cmd_param. In other words whether or not the
+        this cmd_param argument can still accept values
+    """
+    if not isinstance(cmd_param, Argument):
+        return False
+    current_param_values = current_params[cmd_param.name]
+    if current_param_values is None:
+        return True
+    if cmd_param.nargs == -1:
+        return True
+    if (
+        isinstance(current_param_values, abc.Iterable)
+        and cmd_param.nargs > 1
+        and len(current_param_values) < cmd_param.nargs
+    ):
+        return True
+    return False
+
+
+def get_user_autocompletions(ctx, args, incomplete, cmd_param):
+    """
+    :param ctx: context associated with the parsed command
+    :param args: full list of args
+    :param incomplete: the incomplete text to autocomplete
+    :param cmd_param: command definition
+    :return: all the possible user-specified completions for the param
+    """
+    results = []
+    if isinstance(cmd_param.type, Choice):
+        # Choices don't support descriptions.
+        results = [
+            (c, None) for c in cmd_param.type.choices if str(c).startswith(incomplete)
+        ]
+    elif cmd_param.autocompletion is not None:
+        dynamic_completions = cmd_param.autocompletion(
+            ctx=ctx, args=args, incomplete=incomplete
+        )
+        results = [
+            c if isinstance(c, tuple) else (c, None) for c in dynamic_completions
+        ]
+    return results
+
+
+def get_visible_commands_starting_with(ctx, starts_with):
+    """
+    :param ctx: context associated with the parsed command
+    :starts_with: string that visible commands must start with.
+    :return: all visible (not hidden) commands that start with starts_with.
+    """
+    for c in ctx.command.list_commands(ctx):
+        if c.startswith(starts_with):
+            command = ctx.command.get_command(ctx, c)
+            if not command.hidden:
+                yield command
+
+
+def add_subcommand_completions(ctx, incomplete, completions_out):
+    # Add subcommand completions.
+    if isinstance(ctx.command, MultiCommand):
+        completions_out.extend(
+            [
+                (c.name, c.get_short_help_str())
+                for c in get_visible_commands_starting_with(ctx, incomplete)
+            ]
+        )
+
+    # Walk up the context list and add any other completion
+    # possibilities from chained commands
+    while ctx.parent is not None:
+        ctx = ctx.parent
+        if isinstance(ctx.command, MultiCommand) and ctx.command.chain:
+            remaining_commands = [
+                c
+                for c in get_visible_commands_starting_with(ctx, incomplete)
+                if c.name not in ctx.protected_args
+            ]
+            completions_out.extend(
+                [(c.name, c.get_short_help_str()) for c in remaining_commands]
+            )
+
+
+def get_choices(cli, prog_name, args, incomplete):
+    """
+    :param cli: command definition
+    :param prog_name: the program that is running
+    :param args: full list of args
+    :param incomplete: the incomplete text to autocomplete
+    :return: all the possible completions for the incomplete
+    """
+    all_args = copy.deepcopy(args)
+
+    ctx = resolve_ctx(cli, prog_name, args)
+    if ctx is None:
+        return []
+
+    has_double_dash = "--" in all_args
+
+    # In newer versions of bash long opts with '='s are partitioned, but
+    # it's easier to parse without the '='
+    if start_of_option(incomplete) and WORDBREAK in incomplete:
+        partition_incomplete = incomplete.partition(WORDBREAK)
+        all_args.append(partition_incomplete[0])
+        incomplete = partition_incomplete[2]
+    elif incomplete == WORDBREAK:
+        incomplete = ""
+
+    completions = []
+    if not has_double_dash and start_of_option(incomplete):
+        # completions for partial options
+        for param in ctx.command.params:
+            if isinstance(param, Option) and not param.hidden:
+                param_opts = [
+                    param_opt
+                    for param_opt in param.opts + param.secondary_opts
+                    if param_opt not in all_args or param.multiple
+                ]
+                completions.extend(
+                    [(o, param.help) for o in param_opts if o.startswith(incomplete)]
+                )
+        return completions
+    # completion for option values from user supplied values
+    for param in ctx.command.params:
+        if is_incomplete_option(all_args, param):
+            return get_user_autocompletions(ctx, all_args, incomplete, param)
+    # completion for argument values from user supplied values
+    for param in ctx.command.params:
+        if is_incomplete_argument(ctx.params, param):
+            return get_user_autocompletions(ctx, all_args, incomplete, param)
+
+    add_subcommand_completions(ctx, incomplete, completions)
+    # Sort before returning so that proper ordering can be enforced in custom types.
+    return sorted(completions)
+
+
+def do_complete(cli, prog_name, include_descriptions):
+    cwords = split_arg_string(os.environ["COMP_WORDS"])
+    cword = int(os.environ["COMP_CWORD"])
+    args = cwords[1:cword]
+    try:
+        incomplete = cwords[cword]
+    except IndexError:
+        incomplete = ""
+
+    for item in get_choices(cli, prog_name, args, incomplete):
+        echo(item[0])
+        if include_descriptions:
+            # ZSH has trouble dealing with empty array parameters when
+            # returned from commands, use '_' to indicate no description
+            # is present.
+            echo(item[1] if item[1] else "_")
+
+    return True
+
+
+def do_complete_fish(cli, prog_name):
+    cwords = split_arg_string(os.environ["COMP_WORDS"])
+    incomplete = os.environ["COMP_CWORD"]
+    args = cwords[1:]
+
+    for item in get_choices(cli, prog_name, args, incomplete):
+        if item[1]:
+            echo("{arg}\t{desc}".format(arg=item[0], desc=item[1]))
+        else:
+            echo(item[0])
+
+    return True
+
+
+def bashcomplete(cli, prog_name, complete_var, complete_instr):
+    if "_" in complete_instr:
+        command, shell = complete_instr.split("_", 1)
+    else:
+        command = complete_instr
+        shell = "bash"
+
+    if command == "source":
+        echo(get_completion_script(prog_name, complete_var, shell))
+        return True
+    elif command == "complete":
+        if shell == "fish":
+            return do_complete_fish(cli, prog_name)
+        elif shell in {"bash", "zsh"}:
+            return do_complete(cli, prog_name, shell == "zsh")
+
+    return False
--- a/matteo_env/Lib/site-packages/click/_compat.py
+++ b/matteo_env/Lib/site-packages/click/_compat.py
@ -0,0 +1,786 @@
+# flake8: noqa
+import codecs
+import io
+import os
+import re
+import sys
+from weakref import WeakKeyDictionary
+
+PY2 = sys.version_info[0] == 2
+CYGWIN = sys.platform.startswith("cygwin")
+MSYS2 = sys.platform.startswith("win") and ("GCC" in sys.version)
+# Determine local App Engine environment, per Google's own suggestion
+APP_ENGINE = "APPENGINE_RUNTIME" in os.environ and "Development/" in os.environ.get(
+    "SERVER_SOFTWARE", ""
+)
+WIN = sys.platform.startswith("win") and not APP_ENGINE and not MSYS2
+DEFAULT_COLUMNS = 80
+
+
+_ansi_re = re.compile(r"\033\[[;?0-9]*[a-zA-Z]")
+
+
+def get_filesystem_encoding():
+    return sys.getfilesystemencoding() or sys.getdefaultencoding()
+
+
+def _make_text_stream(
+    stream, encoding, errors, force_readable=False, force_writable=False
+):
+    if encoding is None:
+        encoding = get_best_encoding(stream)
+    if errors is None:
+        errors = "replace"
+    return _NonClosingTextIOWrapper(
+        stream,
+        encoding,
+        errors,
+        line_buffering=True,
+        force_readable=force_readable,
+        force_writable=force_writable,
+    )
+
+
+def is_ascii_encoding(encoding):
+    """Checks if a given encoding is ascii."""
+    try:
+        return codecs.lookup(encoding).name == "ascii"
+    except LookupError:
+        return False
+
+
+def get_best_encoding(stream):
+    """Returns the default stream encoding if not found."""
+    rv = getattr(stream, "encoding", None) or sys.getdefaultencoding()
+    if is_ascii_encoding(rv):
+        return "utf-8"
+    return rv
+
+
+class _NonClosingTextIOWrapper(io.TextIOWrapper):
+    def __init__(
+        self,
+        stream,
+        encoding,
+        errors,
+        force_readable=False,
+        force_writable=False,
+        **extra
+    ):
+        self._stream = stream = _FixupStream(stream, force_readable, force_writable)
+        io.TextIOWrapper.__init__(self, stream, encoding, errors, **extra)
+
+    # The io module is a place where the Python 3 text behavior
+    # was forced upon Python 2, so we need to unbreak
+    # it to look like Python 2.
+    if PY2:
+
+        def write(self, x):
+            if isinstance(x, str) or is_bytes(x):
+                try:
+                    self.flush()
+                except Exception:
+                    pass
+                return self.buffer.write(str(x))
+            return io.TextIOWrapper.write(self, x)
+
+        def writelines(self, lines):
+            for line in lines:
+                self.write(line)
+
+    def __del__(self):
+        try:
+            self.detach()
+        except Exception:
+            pass
+
+    def isatty(self):
+        # https://bitbucket.org/pypy/pypy/issue/1803
+        return self._stream.isatty()
+
+
+class _FixupStream(object):
+    """The new io interface needs more from streams than streams
+    traditionally implement.  As such, this fix-up code is necessary in
+    some circumstances.
+
+    The forcing of readable and writable flags are there because some tools
+    put badly patched objects on sys (one such offender are certain version
+    of jupyter notebook).
+    """
+
+    def __init__(self, stream, force_readable=False, force_writable=False):
+        self._stream = stream
+        self._force_readable = force_readable
+        self._force_writable = force_writable
+
+    def __getattr__(self, name):
+        return getattr(self._stream, name)
+
+    def read1(self, size):
+        f = getattr(self._stream, "read1", None)
+        if f is not None:
+            return f(size)
+        # We only dispatch to readline instead of read in Python 2 as we
+        # do not want cause problems with the different implementation
+        # of line buffering.
+        if PY2:
+            return self._stream.readline(size)
+        return self._stream.read(size)
+
+    def readable(self):
+        if self._force_readable:
+            return True
+        x = getattr(self._stream, "readable", None)
+        if x is not None:
+            return x()
+        try:
+            self._stream.read(0)
+        except Exception:
+            return False
+        return True
+
+    def writable(self):
+        if self._force_writable:
+            return True
+        x = getattr(self._stream, "writable", None)
+        if x is not None:
+            return x()
+        try:
+            self._stream.write("")
+        except Exception:
+            try:
+                self._stream.write(b"")
+            except Exception:
+                return False
+        return True
+
+    def seekable(self):
+        x = getattr(self._stream, "seekable", None)
+        if x is not None:
+            return x()
+        try:
+            self._stream.seek(self._stream.tell())
+        except Exception:
+            return False
+        return True
+
+
+if PY2:
+    text_type = unicode
+    raw_input = raw_input
+    string_types = (str, unicode)
+    int_types = (int, long)
+    iteritems = lambda x: x.iteritems()
+    range_type = xrange
+
+    def is_bytes(x):
+        return isinstance(x, (buffer, bytearray))
+
+    _identifier_re = re.compile(r"^[a-zA-Z_][a-zA-Z0-9_]*$")
+
+    # For Windows, we need to force stdout/stdin/stderr to binary if it's
+    # fetched for that.  This obviously is not the most correct way to do
+    # it as it changes global state.  Unfortunately, there does not seem to
+    # be a clear better way to do it as just reopening the file in binary
+    # mode does not change anything.
+    #
+    # An option would be to do what Python 3 does and to open the file as
+    # binary only, patch it back to the system, and then use a wrapper
+    # stream that converts newlines.  It's not quite clear what's the
+    # correct option here.
+    #
+    # This code also lives in _winconsole for the fallback to the console
+    # emulation stream.
+    #
+    # There are also Windows environments where the `msvcrt` module is not
+    # available (which is why we use try-catch instead of the WIN variable
+    # here), such as the Google App Engine development server on Windows. In
+    # those cases there is just nothing we can do.
+    def set_binary_mode(f):
+        return f
+
+    try:
+        import msvcrt
+    except ImportError:
+        pass
+    else:
+
+        def set_binary_mode(f):
+            try:
+                fileno = f.fileno()
+            except Exception:
+                pass
+            else:
+                msvcrt.setmode(fileno, os.O_BINARY)
+            return f
+
+    try:
+        import fcntl
+    except ImportError:
+        pass
+    else:
+
+        def set_binary_mode(f):
+            try:
+                fileno = f.fileno()
+            except Exception:
+                pass
+            else:
+                flags = fcntl.fcntl(fileno, fcntl.F_GETFL)
+                fcntl.fcntl(fileno, fcntl.F_SETFL, flags & ~os.O_NONBLOCK)
+            return f
+
+    def isidentifier(x):
+        return _identifier_re.search(x) is not None
+
+    def get_binary_stdin():
+        return set_binary_mode(sys.stdin)
+
+    def get_binary_stdout():
+        _wrap_std_stream("stdout")
+        return set_binary_mode(sys.stdout)
+
+    def get_binary_stderr():
+        _wrap_std_stream("stderr")
+        return set_binary_mode(sys.stderr)
+
+    def get_text_stdin(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stdin, encoding, errors)
+        if rv is not None:
+            return rv
+        return _make_text_stream(sys.stdin, encoding, errors, force_readable=True)
+
+    def get_text_stdout(encoding=None, errors=None):
+        _wrap_std_stream("stdout")
+        rv = _get_windows_console_stream(sys.stdout, encoding, errors)
+        if rv is not None:
+            return rv
+        return _make_text_stream(sys.stdout, encoding, errors, force_writable=True)
+
+    def get_text_stderr(encoding=None, errors=None):
+        _wrap_std_stream("stderr")
+        rv = _get_windows_console_stream(sys.stderr, encoding, errors)
+        if rv is not None:
+            return rv
+        return _make_text_stream(sys.stderr, encoding, errors, force_writable=True)
+
+    def filename_to_ui(value):
+        if isinstance(value, bytes):
+            value = value.decode(get_filesystem_encoding(), "replace")
+        return value
+
+
+else:
+    import io
+
+    text_type = str
+    raw_input = input
+    string_types = (str,)
+    int_types = (int,)
+    range_type = range
+    isidentifier = lambda x: x.isidentifier()
+    iteritems = lambda x: iter(x.items())
+
+    def is_bytes(x):
+        return isinstance(x, (bytes, memoryview, bytearray))
+
+    def _is_binary_reader(stream, default=False):
+        try:
+            return isinstance(stream.read(0), bytes)
+        except Exception:
+            return default
+            # This happens in some cases where the stream was already
+            # closed.  In this case, we assume the default.
+
+    def _is_binary_writer(stream, default=False):
+        try:
+            stream.write(b"")
+        except Exception:
+            try:
+                stream.write("")
+                return False
+            except Exception:
+                pass
+            return default
+        return True
+
+    def _find_binary_reader(stream):
+        # We need to figure out if the given stream is already binary.
+        # This can happen because the official docs recommend detaching
+        # the streams to get binary streams.  Some code might do this, so
+        # we need to deal with this case explicitly.
+        if _is_binary_reader(stream, False):
+            return stream
+
+        buf = getattr(stream, "buffer", None)
+
+        # Same situation here; this time we assume that the buffer is
+        # actually binary in case it's closed.
+        if buf is not None and _is_binary_reader(buf, True):
+            return buf
+
+    def _find_binary_writer(stream):
+        # We need to figure out if the given stream is already binary.
+        # This can happen because the official docs recommend detatching
+        # the streams to get binary streams.  Some code might do this, so
+        # we need to deal with this case explicitly.
+        if _is_binary_writer(stream, False):
+            return stream
+
+        buf = getattr(stream, "buffer", None)
+
+        # Same situation here; this time we assume that the buffer is
+        # actually binary in case it's closed.
+        if buf is not None and _is_binary_writer(buf, True):
+            return buf
+
+    def _stream_is_misconfigured(stream):
+        """A stream is misconfigured if its encoding is ASCII."""
+        # If the stream does not have an encoding set, we assume it's set
+        # to ASCII.  This appears to happen in certain unittest
+        # environments.  It's not quite clear what the correct behavior is
+        # but this at least will force Click to recover somehow.
+        return is_ascii_encoding(getattr(stream, "encoding", None) or "ascii")
+
+    def _is_compat_stream_attr(stream, attr, value):
+        """A stream attribute is compatible if it is equal to the
+        desired value or the desired value is unset and the attribute
+        has a value.
+        """
+        stream_value = getattr(stream, attr, None)
+        return stream_value == value or (value is None and stream_value is not None)
+
+    def _is_compatible_text_stream(stream, encoding, errors):
+        """Check if a stream's encoding and errors attributes are
+        compatible with the desired values.
+        """
+        return _is_compat_stream_attr(
+            stream, "encoding", encoding
+        ) and _is_compat_stream_attr(stream, "errors", errors)
+
+    def _force_correct_text_stream(
+        text_stream,
+        encoding,
+        errors,
+        is_binary,
+        find_binary,
+        force_readable=False,
+        force_writable=False,
+    ):
+        if is_binary(text_stream, False):
+            binary_reader = text_stream
+        else:
+            # If the stream looks compatible, and won't default to a
+            # misconfigured ascii encoding, return it as-is.
+            if _is_compatible_text_stream(text_stream, encoding, errors) and not (
+                encoding is None and _stream_is_misconfigured(text_stream)
+            ):
+                return text_stream
+
+            # Otherwise, get the underlying binary reader.
+            binary_reader = find_binary(text_stream)
+
+            # If that's not possible, silently use the original reader
+            # and get mojibake instead of exceptions.
+            if binary_reader is None:
+                return text_stream
+
+        # Default errors to replace instead of strict in order to get
+        # something that works.
+        if errors is None:
+            errors = "replace"
+
+        # Wrap the binary stream in a text stream with the correct
+        # encoding parameters.
+        return _make_text_stream(
+            binary_reader,
+            encoding,
+            errors,
+            force_readable=force_readable,
+            force_writable=force_writable,
+        )
+
+    def _force_correct_text_reader(text_reader, encoding, errors, force_readable=False):
+        return _force_correct_text_stream(
+            text_reader,
+            encoding,
+            errors,
+            _is_binary_reader,
+            _find_binary_reader,
+            force_readable=force_readable,
+        )
+
+    def _force_correct_text_writer(text_writer, encoding, errors, force_writable=False):
+        return _force_correct_text_stream(
+            text_writer,
+            encoding,
+            errors,
+            _is_binary_writer,
+            _find_binary_writer,
+            force_writable=force_writable,
+        )
+
+    def get_binary_stdin():
+        reader = _find_binary_reader(sys.stdin)
+        if reader is None:
+            raise RuntimeError("Was not able to determine binary stream for sys.stdin.")
+        return reader
+
+    def get_binary_stdout():
+        writer = _find_binary_writer(sys.stdout)
+        if writer is None:
+            raise RuntimeError(
+                "Was not able to determine binary stream for sys.stdout."
+            )
+        return writer
+
+    def get_binary_stderr():
+        writer = _find_binary_writer(sys.stderr)
+        if writer is None:
+            raise RuntimeError(
+                "Was not able to determine binary stream for sys.stderr."
+            )
+        return writer
+
+    def get_text_stdin(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stdin, encoding, errors)
+        if rv is not None:
+            return rv
+        return _force_correct_text_reader(
+            sys.stdin, encoding, errors, force_readable=True
+        )
+
+    def get_text_stdout(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stdout, encoding, errors)
+        if rv is not None:
+            return rv
+        return _force_correct_text_writer(
+            sys.stdout, encoding, errors, force_writable=True
+        )
+
+    def get_text_stderr(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stderr, encoding, errors)
+        if rv is not None:
+            return rv
+        return _force_correct_text_writer(
+            sys.stderr, encoding, errors, force_writable=True
+        )
+
+    def filename_to_ui(value):
+        if isinstance(value, bytes):
+            value = value.decode(get_filesystem_encoding(), "replace")
+        else:
+            value = value.encode("utf-8", "surrogateescape").decode("utf-8", "replace")
+        return value
+
+
+def get_streerror(e, default=None):
+    if hasattr(e, "strerror"):
+        msg = e.strerror
+    else:
+        if default is not None:
+            msg = default
+        else:
+            msg = str(e)
+    if isinstance(msg, bytes):
+        msg = msg.decode("utf-8", "replace")
+    return msg
+
+
+def _wrap_io_open(file, mode, encoding, errors):
+    """On Python 2, :func:`io.open` returns a text file wrapper that
+    requires passing ``unicode`` to ``write``. Need to open the file in
+    binary mode then wrap it in a subclass that can write ``str`` and
+    ``unicode``.
+
+    Also handles not passing ``encoding`` and ``errors`` in binary mode.
+    """
+    binary = "b" in mode
+
+    if binary:
+        kwargs = {}
+    else:
+        kwargs = {"encoding": encoding, "errors": errors}
+
+    if not PY2 or binary:
+        return io.open(file, mode, **kwargs)
+
+    f = io.open(file, "{}b".format(mode.replace("t", "")))
+    return _make_text_stream(f, **kwargs)
+
+
+def open_stream(filename, mode="r", encoding=None, errors="strict", atomic=False):
+    binary = "b" in mode
+
+    # Standard streams first.  These are simple because they don't need
+    # special handling for the atomic flag.  It's entirely ignored.
+    if filename == "-":
+        if any(m in mode for m in ["w", "a", "x"]):
+            if binary:
+                return get_binary_stdout(), False
+            return get_text_stdout(encoding=encoding, errors=errors), False
+        if binary:
+            return get_binary_stdin(), False
+        return get_text_stdin(encoding=encoding, errors=errors), False
+
+    # Non-atomic writes directly go out through the regular open functions.
+    if not atomic:
+        return _wrap_io_open(filename, mode, encoding, errors), True
+
+    # Some usability stuff for atomic writes
+    if "a" in mode:
+        raise ValueError(
+            "Appending to an existing file is not supported, because that"
+            " would involve an expensive `copy`-operation to a temporary"
+            " file. Open the file in normal `w`-mode and copy explicitly"
+            " if that's what you're after."
+        )
+    if "x" in mode:
+        raise ValueError("Use the `overwrite`-parameter instead.")
+    if "w" not in mode:
+        raise ValueError("Atomic writes only make sense with `w`-mode.")
+
+    # Atomic writes are more complicated.  They work by opening a file
+    # as a proxy in the same folder and then using the fdopen
+    # functionality to wrap it in a Python file.  Then we wrap it in an
+    # atomic file that moves the file over on close.
+    import errno
+    import random
+
+    try:
+        perm = os.stat(filename).st_mode
+    except OSError:
+        perm = None
+
+    flags = os.O_RDWR | os.O_CREAT | os.O_EXCL
+
+    if binary:
+        flags |= getattr(os, "O_BINARY", 0)
+
+    while True:
+        tmp_filename = os.path.join(
+            os.path.dirname(filename),
+            ".__atomic-write{:08x}".format(random.randrange(1 << 32)),
+        )
+        try:
+            fd = os.open(tmp_filename, flags, 0o666 if perm is None else perm)
+            break
+        except OSError as e:
+            if e.errno == errno.EEXIST or (
+                os.name == "nt"
+                and e.errno == errno.EACCES
+                and os.path.isdir(e.filename)
+                and os.access(e.filename, os.W_OK)
+            ):
+                continue
+            raise
+
+    if perm is not None:
+        os.chmod(tmp_filename, perm)  # in case perm includes bits in umask
+
+    f = _wrap_io_open(fd, mode, encoding, errors)
+    return _AtomicFile(f, tmp_filename, os.path.realpath(filename)), True
+
+
+# Used in a destructor call, needs extra protection from interpreter cleanup.
+if hasattr(os, "replace"):
+    _replace = os.replace
+    _can_replace = True
+else:
+    _replace = os.rename
+    _can_replace = not WIN
+
+
+class _AtomicFile(object):
+    def __init__(self, f, tmp_filename, real_filename):
+        self._f = f
+        self._tmp_filename = tmp_filename
+        self._real_filename = real_filename
+        self.closed = False
+
+    @property
+    def name(self):
+        return self._real_filename
+
+    def close(self, delete=False):
+        if self.closed:
+            return
+        self._f.close()
+        if not _can_replace:
+            try:
+                os.remove(self._real_filename)
+            except OSError:
+                pass
+        _replace(self._tmp_filename, self._real_filename)
+        self.closed = True
+
+    def __getattr__(self, name):
+        return getattr(self._f, name)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close(delete=exc_type is not None)
+
+    def __repr__(self):
+        return repr(self._f)
+
+
+auto_wrap_for_ansi = None
+colorama = None
+get_winterm_size = None
+
+
+def strip_ansi(value):
+    return _ansi_re.sub("", value)
+
+
+def _is_jupyter_kernel_output(stream):
+    if WIN:
+        # TODO: Couldn't test on Windows, should't try to support until
+        # someone tests the details wrt colorama.
+        return
+
+    while isinstance(stream, (_FixupStream, _NonClosingTextIOWrapper)):
+        stream = stream._stream
+
+    return stream.__class__.__module__.startswith("ipykernel.")
+
+
+def should_strip_ansi(stream=None, color=None):
+    if color is None:
+        if stream is None:
+            stream = sys.stdin
+        return not isatty(stream) and not _is_jupyter_kernel_output(stream)
+    return not color
+
+
+# If we're on Windows, we provide transparent integration through
+# colorama.  This will make ANSI colors through the echo function
+# work automatically.
+if WIN:
+    # Windows has a smaller terminal
+    DEFAULT_COLUMNS = 79
+
+    from ._winconsole import _get_windows_console_stream, _wrap_std_stream
+
+    def _get_argv_encoding():
+        import locale
+
+        return locale.getpreferredencoding()
+
+    if PY2:
+
+        def raw_input(prompt=""):
+            sys.stderr.flush()
+            if prompt:
+                stdout = _default_text_stdout()
+                stdout.write(prompt)
+            stdin = _default_text_stdin()
+            return stdin.readline().rstrip("\r\n")
+
+    try:
+        import colorama
+    except ImportError:
+        pass
+    else:
+        _ansi_stream_wrappers = WeakKeyDictionary()
+
+        def auto_wrap_for_ansi(stream, color=None):
+            """This function wraps a stream so that calls through colorama
+            are issued to the win32 console API to recolor on demand.  It
+            also ensures to reset the colors if a write call is interrupted
+            to not destroy the console afterwards.
+            """
+            try:
+                cached = _ansi_stream_wrappers.get(stream)
+            except Exception:
+                cached = None
+            if cached is not None:
+                return cached
+            strip = should_strip_ansi(stream, color)
+            ansi_wrapper = colorama.AnsiToWin32(stream, strip=strip)
+            rv = ansi_wrapper.stream
+            _write = rv.write
+
+            def _safe_write(s):
+                try:
+                    return _write(s)
+                except:
+                    ansi_wrapper.reset_all()
+                    raise
+
+            rv.write = _safe_write
+            try:
+                _ansi_stream_wrappers[stream] = rv
+            except Exception:
+                pass
+            return rv
+
+        def get_winterm_size():
+            win = colorama.win32.GetConsoleScreenBufferInfo(
+                colorama.win32.STDOUT
+            ).srWindow
+            return win.Right - win.Left, win.Bottom - win.Top
+
+
+else:
+
+    def _get_argv_encoding():
+        return getattr(sys.stdin, "encoding", None) or get_filesystem_encoding()
+
+    _get_windows_console_stream = lambda *x: None
+    _wrap_std_stream = lambda *x: None
+
+
+def term_len(x):
+    return len(strip_ansi(x))
+
+
+def isatty(stream):
+    try:
+        return stream.isatty()
+    except Exception:
+        return False
+
+
+def _make_cached_stream_func(src_func, wrapper_func):
+    cache = WeakKeyDictionary()
+
+    def func():
+        stream = src_func()
+        try:
+            rv = cache.get(stream)
+        except Exception:
+            rv = None
+        if rv is not None:
+            return rv
+        rv = wrapper_func()
+        try:
+            stream = src_func()  # In case wrapper_func() modified the stream
+            cache[stream] = rv
+        except Exception:
+            pass
+        return rv
+
+    return func
+
+
+_default_text_stdin = _make_cached_stream_func(lambda: sys.stdin, get_text_stdin)
+_default_text_stdout = _make_cached_stream_func(lambda: sys.stdout, get_text_stdout)
+_default_text_stderr = _make_cached_stream_func(lambda: sys.stderr, get_text_stderr)
+
+
+binary_streams = {
+    "stdin": get_binary_stdin,
+    "stdout": get_binary_stdout,
+    "stderr": get_binary_stderr,
+}
+
+text_streams = {
+    "stdin": get_text_stdin,
+    "stdout": get_text_stdout,
+    "stderr": get_text_stderr,
+}
--- a/matteo_env/Lib/site-packages/click/_termui_impl.py
+++ b/matteo_env/Lib/site-packages/click/_termui_impl.py
@ -0,0 +1,657 @@
+# -*- coding: utf-8 -*-
+"""
+This module contains implementations for the termui module. To keep the
+import time of Click down, some infrequently used functionality is
+placed in this module and only imported as needed.
+"""
+import contextlib
+import math
+import os
+import sys
+import time
+
+from ._compat import _default_text_stdout
+from ._compat import CYGWIN
+from ._compat import get_best_encoding
+from ._compat import int_types
+from ._compat import isatty
+from ._compat import open_stream
+from ._compat import range_type
+from ._compat import strip_ansi
+from ._compat import term_len
+from ._compat import WIN
+from .exceptions import ClickException
+from .utils import echo
+
+if os.name == "nt":
+    BEFORE_BAR = "\r"
+    AFTER_BAR = "\n"
+else:
+    BEFORE_BAR = "\r\033[?25l"
+    AFTER_BAR = "\033[?25h\n"
+
+
+def _length_hint(obj):
+    """Returns the length hint of an object."""
+    try:
+        return len(obj)
+    except (AttributeError, TypeError):
+        try:
+            get_hint = type(obj).__length_hint__
+        except AttributeError:
+            return None
+        try:
+            hint = get_hint(obj)
+        except TypeError:
+            return None
+        if hint is NotImplemented or not isinstance(hint, int_types) or hint < 0:
+            return None
+        return hint
+
+
+class ProgressBar(object):
+    def __init__(
+        self,
+        iterable,
+        length=None,
+        fill_char="#",
+        empty_char=" ",
+        bar_template="%(bar)s",
+        info_sep="  ",
+        show_eta=True,
+        show_percent=None,
+        show_pos=False,
+        item_show_func=None,
+        label=None,
+        file=None,
+        color=None,
+        width=30,
+    ):
+        self.fill_char = fill_char
+        self.empty_char = empty_char
+        self.bar_template = bar_template
+        self.info_sep = info_sep
+        self.show_eta = show_eta
+        self.show_percent = show_percent
+        self.show_pos = show_pos
+        self.item_show_func = item_show_func
+        self.label = label or ""
+        if file is None:
+            file = _default_text_stdout()
+        self.file = file
+        self.color = color
+        self.width = width
+        self.autowidth = width == 0
+
+        if length is None:
+            length = _length_hint(iterable)
+        if iterable is None:
+            if length is None:
+                raise TypeError("iterable or length is required")
+            iterable = range_type(length)
+        self.iter = iter(iterable)
+        self.length = length
+        self.length_known = length is not None
+        self.pos = 0
+        self.avg = []
+        self.start = self.last_eta = time.time()
+        self.eta_known = False
+        self.finished = False
+        self.max_width = None
+        self.entered = False
+        self.current_item = None
+        self.is_hidden = not isatty(self.file)
+        self._last_line = None
+        self.short_limit = 0.5
+
+    def __enter__(self):
+        self.entered = True
+        self.render_progress()
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.render_finish()
+
+    def __iter__(self):
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+        self.render_progress()
+        return self.generator()
+
+    def __next__(self):
+        # Iteration is defined in terms of a generator function,
+        # returned by iter(self); use that to define next(). This works
+        # because `self.iter` is an iterable consumed by that generator,
+        # so it is re-entry safe. Calling `next(self.generator())`
+        # twice works and does "what you want".
+        return next(iter(self))
+
+    # Python 2 compat
+    next = __next__
+
+    def is_fast(self):
+        return time.time() - self.start <= self.short_limit
+
+    def render_finish(self):
+        if self.is_hidden or self.is_fast():
+            return
+        self.file.write(AFTER_BAR)
+        self.file.flush()
+
+    @property
+    def pct(self):
+        if self.finished:
+            return 1.0
+        return min(self.pos / (float(self.length) or 1), 1.0)
+
+    @property
+    def time_per_iteration(self):
+        if not self.avg:
+            return 0.0
+        return sum(self.avg) / float(len(self.avg))
+
+    @property
+    def eta(self):
+        if self.length_known and not self.finished:
+            return self.time_per_iteration * (self.length - self.pos)
+        return 0.0
+
+    def format_eta(self):
+        if self.eta_known:
+            t = int(self.eta)
+            seconds = t % 60
+            t //= 60
+            minutes = t % 60
+            t //= 60
+            hours = t % 24
+            t //= 24
+            if t > 0:
+                return "{}d {:02}:{:02}:{:02}".format(t, hours, minutes, seconds)
+            else:
+                return "{:02}:{:02}:{:02}".format(hours, minutes, seconds)
+        return ""
+
+    def format_pos(self):
+        pos = str(self.pos)
+        if self.length_known:
+            pos += "/{}".format(self.length)
+        return pos
+
+    def format_pct(self):
+        return "{: 4}%".format(int(self.pct * 100))[1:]
+
+    def format_bar(self):
+        if self.length_known:
+            bar_length = int(self.pct * self.width)
+            bar = self.fill_char * bar_length
+            bar += self.empty_char * (self.width - bar_length)
+        elif self.finished:
+            bar = self.fill_char * self.width
+        else:
+            bar = list(self.empty_char * (self.width or 1))
+            if self.time_per_iteration != 0:
+                bar[
+                    int(
+                        (math.cos(self.pos * self.time_per_iteration) / 2.0 + 0.5)
+                        * self.width
+                    )
+                ] = self.fill_char
+            bar = "".join(bar)
+        return bar
+
+    def format_progress_line(self):
+        show_percent = self.show_percent
+
+        info_bits = []
+        if self.length_known and show_percent is None:
+            show_percent = not self.show_pos
+
+        if self.show_pos:
+            info_bits.append(self.format_pos())
+        if show_percent:
+            info_bits.append(self.format_pct())
+        if self.show_eta and self.eta_known and not self.finished:
+            info_bits.append(self.format_eta())
+        if self.item_show_func is not None:
+            item_info = self.item_show_func(self.current_item)
+            if item_info is not None:
+                info_bits.append(item_info)
+
+        return (
+            self.bar_template
+            % {
+                "label": self.label,
+                "bar": self.format_bar(),
+                "info": self.info_sep.join(info_bits),
+            }
+        ).rstrip()
+
+    def render_progress(self):
+        from .termui import get_terminal_size
+
+        if self.is_hidden:
+            return
+
+        buf = []
+        # Update width in case the terminal has been resized
+        if self.autowidth:
+            old_width = self.width
+            self.width = 0
+            clutter_length = term_len(self.format_progress_line())
+            new_width = max(0, get_terminal_size()[0] - clutter_length)
+            if new_width < old_width:
+                buf.append(BEFORE_BAR)
+                buf.append(" " * self.max_width)
+                self.max_width = new_width
+            self.width = new_width
+
+        clear_width = self.width
+        if self.max_width is not None:
+            clear_width = self.max_width
+
+        buf.append(BEFORE_BAR)
+        line = self.format_progress_line()
+        line_len = term_len(line)
+        if self.max_width is None or self.max_width < line_len:
+            self.max_width = line_len
+
+        buf.append(line)
+        buf.append(" " * (clear_width - line_len))
+        line = "".join(buf)
+        # Render the line only if it changed.
+
+        if line != self._last_line and not self.is_fast():
+            self._last_line = line
+            echo(line, file=self.file, color=self.color, nl=False)
+            self.file.flush()
+
+    def make_step(self, n_steps):
+        self.pos += n_steps
+        if self.length_known and self.pos >= self.length:
+            self.finished = True
+
+        if (time.time() - self.last_eta) < 1.0:
+            return
+
+        self.last_eta = time.time()
+
+        # self.avg is a rolling list of length <= 7 of steps where steps are
+        # defined as time elapsed divided by the total progress through
+        # self.length.
+        if self.pos:
+            step = (time.time() - self.start) / self.pos
+        else:
+            step = time.time() - self.start
+
+        self.avg = self.avg[-6:] + [step]
+
+        self.eta_known = self.length_known
+
+    def update(self, n_steps):
+        self.make_step(n_steps)
+        self.render_progress()
+
+    def finish(self):
+        self.eta_known = 0
+        self.current_item = None
+        self.finished = True
+
+    def generator(self):
+        """Return a generator which yields the items added to the bar
+        during construction, and updates the progress bar *after* the
+        yielded block returns.
+        """
+        # WARNING: the iterator interface for `ProgressBar` relies on
+        # this and only works because this is a simple generator which
+        # doesn't create or manage additional state. If this function
+        # changes, the impact should be evaluated both against
+        # `iter(bar)` and `next(bar)`. `next()` in particular may call
+        # `self.generator()` repeatedly, and this must remain safe in
+        # order for that interface to work.
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+
+        if self.is_hidden:
+            for rv in self.iter:
+                yield rv
+        else:
+            for rv in self.iter:
+                self.current_item = rv
+                yield rv
+                self.update(1)
+            self.finish()
+            self.render_progress()
+
+
+def pager(generator, color=None):
+    """Decide what method to use for paging through text."""
+    stdout = _default_text_stdout()
+    if not isatty(sys.stdin) or not isatty(stdout):
+        return _nullpager(stdout, generator, color)
+    pager_cmd = (os.environ.get("PAGER", None) or "").strip()
+    if pager_cmd:
+        if WIN:
+            return _tempfilepager(generator, pager_cmd, color)
+        return _pipepager(generator, pager_cmd, color)
+    if os.environ.get("TERM") in ("dumb", "emacs"):
+        return _nullpager(stdout, generator, color)
+    if WIN or sys.platform.startswith("os2"):
+        return _tempfilepager(generator, "more <", color)
+    if hasattr(os, "system") and os.system("(less) 2>/dev/null") == 0:
+        return _pipepager(generator, "less", color)
+
+    import tempfile
+
+    fd, filename = tempfile.mkstemp()
+    os.close(fd)
+    try:
+        if hasattr(os, "system") and os.system('more "{}"'.format(filename)) == 0:
+            return _pipepager(generator, "more", color)
+        return _nullpager(stdout, generator, color)
+    finally:
+        os.unlink(filename)
+
+
+def _pipepager(generator, cmd, color):
+    """Page through text by feeding it to another program.  Invoking a
+    pager through this might support colors.
+    """
+    import subprocess
+
+    env = dict(os.environ)
+
+    # If we're piping to less we might support colors under the
+    # condition that
+    cmd_detail = cmd.rsplit("/", 1)[-1].split()
+    if color is None and cmd_detail[0] == "less":
+        less_flags = "{}{}".format(os.environ.get("LESS", ""), " ".join(cmd_detail[1:]))
+        if not less_flags:
+            env["LESS"] = "-R"
+            color = True
+        elif "r" in less_flags or "R" in less_flags:
+            color = True
+
+    c = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, env=env)
+    encoding = get_best_encoding(c.stdin)
+    try:
+        for text in generator:
+            if not color:
+                text = strip_ansi(text)
+
+            c.stdin.write(text.encode(encoding, "replace"))
+    except (IOError, KeyboardInterrupt):
+        pass
+    else:
+        c.stdin.close()
+
+    # Less doesn't respect ^C, but catches it for its own UI purposes (aborting
+    # search or other commands inside less).
+    #
+    # That means when the user hits ^C, the parent process (click) terminates,
+    # but less is still alive, paging the output and messing up the terminal.
+    #
+    # If the user wants to make the pager exit on ^C, they should set
+    # `LESS='-K'`. It's not our decision to make.
+    while True:
+        try:
+            c.wait()
+        except KeyboardInterrupt:
+            pass
+        else:
+            break
+
+
+def _tempfilepager(generator, cmd, color):
+    """Page through text by invoking a program on a temporary file."""
+    import tempfile
+
+    filename = tempfile.mktemp()
+    # TODO: This never terminates if the passed generator never terminates.
+    text = "".join(generator)
+    if not color:
+        text = strip_ansi(text)
+    encoding = get_best_encoding(sys.stdout)
+    with open_stream(filename, "wb")[0] as f:
+        f.write(text.encode(encoding))
+    try:
+        os.system('{} "{}"'.format(cmd, filename))
+    finally:
+        os.unlink(filename)
+
+
+def _nullpager(stream, generator, color):
+    """Simply print unformatted text.  This is the ultimate fallback."""
+    for text in generator:
+        if not color:
+            text = strip_ansi(text)
+        stream.write(text)
+
+
+class Editor(object):
+    def __init__(self, editor=None, env=None, require_save=True, extension=".txt"):
+        self.editor = editor
+        self.env = env
+        self.require_save = require_save
+        self.extension = extension
+
+    def get_editor(self):
+        if self.editor is not None:
+            return self.editor
+        for key in "VISUAL", "EDITOR":
+            rv = os.environ.get(key)
+            if rv:
+                return rv
+        if WIN:
+            return "notepad"
+        for editor in "sensible-editor", "vim", "nano":
+            if os.system("which {} >/dev/null 2>&1".format(editor)) == 0:
+                return editor
+        return "vi"
+
+    def edit_file(self, filename):
+        import subprocess
+
+        editor = self.get_editor()
+        if self.env:
+            environ = os.environ.copy()
+            environ.update(self.env)
+        else:
+            environ = None
+        try:
+            c = subprocess.Popen(
+                '{} "{}"'.format(editor, filename), env=environ, shell=True,
+            )
+            exit_code = c.wait()
+            if exit_code != 0:
+                raise ClickException("{}: Editing failed!".format(editor))
+        except OSError as e:
+            raise ClickException("{}: Editing failed: {}".format(editor, e))
+
+    def edit(self, text):
+        import tempfile
+
+        text = text or ""
+        if text and not text.endswith("\n"):
+            text += "\n"
+
+        fd, name = tempfile.mkstemp(prefix="editor-", suffix=self.extension)
+        try:
+            if WIN:
+                encoding = "utf-8-sig"
+                text = text.replace("\n", "\r\n")
+            else:
+                encoding = "utf-8"
+            text = text.encode(encoding)
+
+            f = os.fdopen(fd, "wb")
+            f.write(text)
+            f.close()
+            timestamp = os.path.getmtime(name)
+
+            self.edit_file(name)
+
+            if self.require_save and os.path.getmtime(name) == timestamp:
+                return None
+
+            f = open(name, "rb")
+            try:
+                rv = f.read()
+            finally:
+                f.close()
+            return rv.decode("utf-8-sig").replace("\r\n", "\n")
+        finally:
+            os.unlink(name)
+
+
+def open_url(url, wait=False, locate=False):
+    import subprocess
+
+    def _unquote_file(url):
+        try:
+            import urllib
+        except ImportError:
+            import urllib
+        if url.startswith("file://"):
+            url = urllib.unquote(url[7:])
+        return url
+
+    if sys.platform == "darwin":
+        args = ["open"]
+        if wait:
+            args.append("-W")
+        if locate:
+            args.append("-R")
+        args.append(_unquote_file(url))
+        null = open("/dev/null", "w")
+        try:
+            return subprocess.Popen(args, stderr=null).wait()
+        finally:
+            null.close()
+    elif WIN:
+        if locate:
+            url = _unquote_file(url)
+            args = 'explorer /select,"{}"'.format(_unquote_file(url.replace('"', "")))
+        else:
+            args = 'start {} "" "{}"'.format(
+                "/WAIT" if wait else "", url.replace('"', "")
+            )
+        return os.system(args)
+    elif CYGWIN:
+        if locate:
+            url = _unquote_file(url)
+            args = 'cygstart "{}"'.format(os.path.dirname(url).replace('"', ""))
+        else:
+            args = 'cygstart {} "{}"'.format("-w" if wait else "", url.replace('"', ""))
+        return os.system(args)
+
+    try:
+        if locate:
+            url = os.path.dirname(_unquote_file(url)) or "."
+        else:
+            url = _unquote_file(url)
+        c = subprocess.Popen(["xdg-open", url])
+        if wait:
+            return c.wait()
+        return 0
+    except OSError:
+        if url.startswith(("http://", "https://")) and not locate and not wait:
+            import webbrowser
+
+            webbrowser.open(url)
+            return 0
+        return 1
+
+
+def _translate_ch_to_exc(ch):
+    if ch == u"\x03":
+        raise KeyboardInterrupt()
+    if ch == u"\x04" and not WIN:  # Unix-like, Ctrl+D
+        raise EOFError()
+    if ch == u"\x1a" and WIN:  # Windows, Ctrl+Z
+        raise EOFError()
+
+
+if WIN:
+    import msvcrt
+
+    @contextlib.contextmanager
+    def raw_terminal():
+        yield
+
+    def getchar(echo):
+        # The function `getch` will return a bytes object corresponding to
+        # the pressed character. Since Windows 10 build 1803, it will also
+        # return \x00 when called a second time after pressing a regular key.
+        #
+        # `getwch` does not share this probably-bugged behavior. Moreover, it
+        # returns a Unicode object by default, which is what we want.
+        #
+        # Either of these functions will return \x00 or \xe0 to indicate
+        # a special key, and you need to call the same function again to get
+        # the "rest" of the code. The fun part is that \u00e0 is
+        # "latin small letter a with grave", so if you type that on a French
+        # keyboard, you _also_ get a \xe0.
+        # E.g., consider the Up arrow. This returns \xe0 and then \x48. The
+        # resulting Unicode string reads as "a with grave" + "capital H".
+        # This is indistinguishable from when the user actually types
+        # "a with grave" and then "capital H".
+        #
+        # When \xe0 is returned, we assume it's part of a special-key sequence
+        # and call `getwch` again, but that means that when the user types
+        # the \u00e0 character, `getchar` doesn't return until a second
+        # character is typed.
+        # The alternative is returning immediately, but that would mess up
+        # cross-platform handling of arrow keys and others that start with
+        # \xe0. Another option is using `getch`, but then we can't reliably
+        # read non-ASCII characters, because return values of `getch` are
+        # limited to the current 8-bit codepage.
+        #
+        # Anyway, Click doesn't claim to do this Right(tm), and using `getwch`
+        # is doing the right thing in more situations than with `getch`.
+        if echo:
+            func = msvcrt.getwche
+        else:
+            func = msvcrt.getwch
+
+        rv = func()
+        if rv in (u"\x00", u"\xe0"):
+            # \x00 and \xe0 are control characters that indicate special key,
+            # see above.
+            rv += func()
+        _translate_ch_to_exc(rv)
+        return rv
+
+
+else:
+    import tty
+    import termios
+
+    @contextlib.contextmanager
+    def raw_terminal():
+        if not isatty(sys.stdin):
+            f = open("/dev/tty")
+            fd = f.fileno()
+        else:
+            fd = sys.stdin.fileno()
+            f = None
+        try:
+            old_settings = termios.tcgetattr(fd)
+            try:
+                tty.setraw(fd)
+                yield fd
+            finally:
+                termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+                sys.stdout.flush()
+                if f is not None:
+                    f.close()
+        except termios.error:
+            pass
+
+    def getchar(echo):
+        with raw_terminal() as fd:
+            ch = os.read(fd, 32)
+            ch = ch.decode(get_best_encoding(sys.stdin), "replace")
+            if echo and isatty(sys.stdout):
+                sys.stdout.write(ch)
+            _translate_ch_to_exc(ch)
+            return ch
--- a/matteo_env/Lib/site-packages/click/_textwrap.py
+++ b/matteo_env/Lib/site-packages/click/_textwrap.py
@ -0,0 +1,37 @@
+import textwrap
+from contextlib import contextmanager
+
+
+class TextWrapper(textwrap.TextWrapper):
+    def _handle_long_word(self, reversed_chunks, cur_line, cur_len, width):
+        space_left = max(width - cur_len, 1)
+
+        if self.break_long_words:
+            last = reversed_chunks[-1]
+            cut = last[:space_left]
+            res = last[space_left:]
+            cur_line.append(cut)
+            reversed_chunks[-1] = res
+        elif not cur_line:
+            cur_line.append(reversed_chunks.pop())
+
+    @contextmanager
+    def extra_indent(self, indent):
+        old_initial_indent = self.initial_indent
+        old_subsequent_indent = self.subsequent_indent
+        self.initial_indent += indent
+        self.subsequent_indent += indent
+        try:
+            yield
+        finally:
+            self.initial_indent = old_initial_indent
+            self.subsequent_indent = old_subsequent_indent
+
+    def indent_only(self, text):
+        rv = []
+        for idx, line in enumerate(text.splitlines()):
+            indent = self.initial_indent
+            if idx > 0:
+                indent = self.subsequent_indent
+            rv.append(indent + line)
+        return "\n".join(rv)
--- a/matteo_env/Lib/site-packages/click/_unicodefun.py
+++ b/matteo_env/Lib/site-packages/click/_unicodefun.py
@ -0,0 +1,131 @@
+import codecs
+import os
+import sys
+
+from ._compat import PY2
+
+
+def _find_unicode_literals_frame():
+    import __future__
+
+    if not hasattr(sys, "_getframe"):  # not all Python implementations have it
+        return 0
+    frm = sys._getframe(1)
+    idx = 1
+    while frm is not None:
+        if frm.f_globals.get("__name__", "").startswith("click."):
+            frm = frm.f_back
+            idx += 1
+        elif frm.f_code.co_flags & __future__.unicode_literals.compiler_flag:
+            return idx
+        else:
+            break
+    return 0
+
+
+def _check_for_unicode_literals():
+    if not __debug__:
+        return
+
+    from . import disable_unicode_literals_warning
+
+    if not PY2 or disable_unicode_literals_warning:
+        return
+    bad_frame = _find_unicode_literals_frame()
+    if bad_frame <= 0:
+        return
+    from warnings import warn
+
+    warn(
+        Warning(
+            "Click detected the use of the unicode_literals __future__"
+            " import. This is heavily discouraged because it can"
+            " introduce subtle bugs in your code. You should instead"
+            ' use explicit u"" literals for your unicode strings. For'
+            " more information see"
+            " https://click.palletsprojects.com/python3/"
+        ),
+        stacklevel=bad_frame,
+    )
+
+
+def _verify_python3_env():
+    """Ensures that the environment is good for unicode on Python 3."""
+    if PY2:
+        return
+    try:
+        import locale
+
+        fs_enc = codecs.lookup(locale.getpreferredencoding()).name
+    except Exception:
+        fs_enc = "ascii"
+    if fs_enc != "ascii":
+        return
+
+    extra = ""
+    if os.name == "posix":
+        import subprocess
+
+        try:
+            rv = subprocess.Popen(
+                ["locale", "-a"], stdout=subprocess.PIPE, stderr=subprocess.PIPE
+            ).communicate()[0]
+        except OSError:
+            rv = b""
+        good_locales = set()
+        has_c_utf8 = False
+
+        # Make sure we're operating on text here.
+        if isinstance(rv, bytes):
+            rv = rv.decode("ascii", "replace")
+
+        for line in rv.splitlines():
+            locale = line.strip()
+            if locale.lower().endswith((".utf-8", ".utf8")):
+                good_locales.add(locale)
+                if locale.lower() in ("c.utf8", "c.utf-8"):
+                    has_c_utf8 = True
+
+        extra += "\n\n"
+        if not good_locales:
+            extra += (
+                "Additional information: on this system no suitable"
+                " UTF-8 locales were discovered. This most likely"
+                " requires resolving by reconfiguring the locale"
+                " system."
+            )
+        elif has_c_utf8:
+            extra += (
+                "This system supports the C.UTF-8 locale which is"
+                " recommended. You might be able to resolve your issue"
+                " by exporting the following environment variables:\n\n"
+                "    export LC_ALL=C.UTF-8\n"
+                "    export LANG=C.UTF-8"
+            )
+        else:
+            extra += (
+                "This system lists a couple of UTF-8 supporting locales"
+                " that you can pick from. The following suitable"
+                " locales were discovered: {}".format(", ".join(sorted(good_locales)))
+            )
+
+        bad_locale = None
+        for locale in os.environ.get("LC_ALL"), os.environ.get("LANG"):
+            if locale and locale.lower().endswith((".utf-8", ".utf8")):
+                bad_locale = locale
+            if locale is not None:
+                break
+        if bad_locale is not None:
+            extra += (
+                "\n\nClick discovered that you exported a UTF-8 locale"
+                " but the locale system could not pick up from it"
+                " because it does not exist. The exported locale is"
+                " '{}' but it is not supported".format(bad_locale)
+            )
+
+    raise RuntimeError(
+        "Click will abort further execution because Python 3 was"
+        " configured to use ASCII as encoding for the environment."
+        " Consult https://click.palletsprojects.com/python3/ for"
+        " mitigation steps.{}".format(extra)
+    )
--- a/matteo_env/Lib/site-packages/click/_winconsole.py
+++ b/matteo_env/Lib/site-packages/click/_winconsole.py
@ -0,0 +1,370 @@
+# -*- coding: utf-8 -*-
+# This module is based on the excellent work by Adam Bartoš who
+# provided a lot of what went into the implementation here in
+# the discussion to issue1602 in the Python bug tracker.
+#
+# There are some general differences in regards to how this works
+# compared to the original patches as we do not need to patch
+# the entire interpreter but just work in our little world of
+# echo and prmopt.
+import ctypes
+import io
+import os
+import sys
+import time
+import zlib
+from ctypes import byref
+from ctypes import c_char
+from ctypes import c_char_p
+from ctypes import c_int
+from ctypes import c_ssize_t
+from ctypes import c_ulong
+from ctypes import c_void_p
+from ctypes import POINTER
+from ctypes import py_object
+from ctypes import windll
+from ctypes import WinError
+from ctypes import WINFUNCTYPE
+from ctypes.wintypes import DWORD
+from ctypes.wintypes import HANDLE
+from ctypes.wintypes import LPCWSTR
+from ctypes.wintypes import LPWSTR
+
+import msvcrt
+
+from ._compat import _NonClosingTextIOWrapper
+from ._compat import PY2
+from ._compat import text_type
+
+try:
+    from ctypes import pythonapi
+
+    PyObject_GetBuffer = pythonapi.PyObject_GetBuffer
+    PyBuffer_Release = pythonapi.PyBuffer_Release
+except ImportError:
+    pythonapi = None
+
+
+c_ssize_p = POINTER(c_ssize_t)
+
+kernel32 = windll.kernel32
+GetStdHandle = kernel32.GetStdHandle
+ReadConsoleW = kernel32.ReadConsoleW
+WriteConsoleW = kernel32.WriteConsoleW
+GetConsoleMode = kernel32.GetConsoleMode
+GetLastError = kernel32.GetLastError
+GetCommandLineW = WINFUNCTYPE(LPWSTR)(("GetCommandLineW", windll.kernel32))
+CommandLineToArgvW = WINFUNCTYPE(POINTER(LPWSTR), LPCWSTR, POINTER(c_int))(
+    ("CommandLineToArgvW", windll.shell32)
+)
+LocalFree = WINFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p)(
+    ("LocalFree", windll.kernel32)
+)
+
+
+STDIN_HANDLE = GetStdHandle(-10)
+STDOUT_HANDLE = GetStdHandle(-11)
+STDERR_HANDLE = GetStdHandle(-12)
+
+
+PyBUF_SIMPLE = 0
+PyBUF_WRITABLE = 1
+
+ERROR_SUCCESS = 0
+ERROR_NOT_ENOUGH_MEMORY = 8
+ERROR_OPERATION_ABORTED = 995
+
+STDIN_FILENO = 0
+STDOUT_FILENO = 1
+STDERR_FILENO = 2
+
+EOF = b"\x1a"
+MAX_BYTES_WRITTEN = 32767
+
+
+class Py_buffer(ctypes.Structure):
+    _fields_ = [
+        ("buf", c_void_p),
+        ("obj", py_object),
+        ("len", c_ssize_t),
+        ("itemsize", c_ssize_t),
+        ("readonly", c_int),
+        ("ndim", c_int),
+        ("format", c_char_p),
+        ("shape", c_ssize_p),
+        ("strides", c_ssize_p),
+        ("suboffsets", c_ssize_p),
+        ("internal", c_void_p),
+    ]
+
+    if PY2:
+        _fields_.insert(-1, ("smalltable", c_ssize_t * 2))
+
+
+# On PyPy we cannot get buffers so our ability to operate here is
+# serverly limited.
+if pythonapi is None:
+    get_buffer = None
+else:
+
+    def get_buffer(obj, writable=False):
+        buf = Py_buffer()
+        flags = PyBUF_WRITABLE if writable else PyBUF_SIMPLE
+        PyObject_GetBuffer(py_object(obj), byref(buf), flags)
+        try:
+            buffer_type = c_char * buf.len
+            return buffer_type.from_address(buf.buf)
+        finally:
+            PyBuffer_Release(byref(buf))
+
+
+class _WindowsConsoleRawIOBase(io.RawIOBase):
+    def __init__(self, handle):
+        self.handle = handle
+
+    def isatty(self):
+        io.RawIOBase.isatty(self)
+        return True
+
+
+class _WindowsConsoleReader(_WindowsConsoleRawIOBase):
+    def readable(self):
+        return True
+
+    def readinto(self, b):
+        bytes_to_be_read = len(b)
+        if not bytes_to_be_read:
+            return 0
+        elif bytes_to_be_read % 2:
+            raise ValueError(
+                "cannot read odd number of bytes from UTF-16-LE encoded console"
+            )
+
+        buffer = get_buffer(b, writable=True)
+        code_units_to_be_read = bytes_to_be_read // 2
+        code_units_read = c_ulong()
+
+        rv = ReadConsoleW(
+            HANDLE(self.handle),
+            buffer,
+            code_units_to_be_read,
+            byref(code_units_read),
+            None,
+        )
+        if GetLastError() == ERROR_OPERATION_ABORTED:
+            # wait for KeyboardInterrupt
+            time.sleep(0.1)
+        if not rv:
+            raise OSError("Windows error: {}".format(GetLastError()))
+
+        if buffer[0] == EOF:
+            return 0
+        return 2 * code_units_read.value
+
+
+class _WindowsConsoleWriter(_WindowsConsoleRawIOBase):
+    def writable(self):
+        return True
+
+    @staticmethod
+    def _get_error_message(errno):
+        if errno == ERROR_SUCCESS:
+            return "ERROR_SUCCESS"
+        elif errno == ERROR_NOT_ENOUGH_MEMORY:
+            return "ERROR_NOT_ENOUGH_MEMORY"
+        return "Windows error {}".format(errno)
+
+    def write(self, b):
+        bytes_to_be_written = len(b)
+        buf = get_buffer(b)
+        code_units_to_be_written = min(bytes_to_be_written, MAX_BYTES_WRITTEN) // 2
+        code_units_written = c_ulong()
+
+        WriteConsoleW(
+            HANDLE(self.handle),
+            buf,
+            code_units_to_be_written,
+            byref(code_units_written),
+            None,
+        )
+        bytes_written = 2 * code_units_written.value
+
+        if bytes_written == 0 and bytes_to_be_written > 0:
+            raise OSError(self._get_error_message(GetLastError()))
+        return bytes_written
+
+
+class ConsoleStream(object):
+    def __init__(self, text_stream, byte_stream):
+        self._text_stream = text_stream
+        self.buffer = byte_stream
+
+    @property
+    def name(self):
+        return self.buffer.name
+
+    def write(self, x):
+        if isinstance(x, text_type):
+            return self._text_stream.write(x)
+        try:
+            self.flush()
+        except Exception:
+            pass
+        return self.buffer.write(x)
+
+    def writelines(self, lines):
+        for line in lines:
+            self.write(line)
+
+    def __getattr__(self, name):
+        return getattr(self._text_stream, name)
+
+    def isatty(self):
+        return self.buffer.isatty()
+
+    def __repr__(self):
+        return "<ConsoleStream name={!r} encoding={!r}>".format(
+            self.name, self.encoding
+        )
+
+
+class WindowsChunkedWriter(object):
+    """
+    Wraps a stream (such as stdout), acting as a transparent proxy for all
+    attribute access apart from method 'write()' which we wrap to write in
+    limited chunks due to a Windows limitation on binary console streams.
+    """
+
+    def __init__(self, wrapped):
+        # double-underscore everything to prevent clashes with names of
+        # attributes on the wrapped stream object.
+        self.__wrapped = wrapped
+
+    def __getattr__(self, name):
+        return getattr(self.__wrapped, name)
+
+    def write(self, text):
+        total_to_write = len(text)
+        written = 0
+
+        while written < total_to_write:
+            to_write = min(total_to_write - written, MAX_BYTES_WRITTEN)
+            self.__wrapped.write(text[written : written + to_write])
+            written += to_write
+
+
+_wrapped_std_streams = set()
+
+
+def _wrap_std_stream(name):
+    # Python 2 & Windows 7 and below
+    if (
+        PY2
+        and sys.getwindowsversion()[:2] <= (6, 1)
+        and name not in _wrapped_std_streams
+    ):
+        setattr(sys, name, WindowsChunkedWriter(getattr(sys, name)))
+        _wrapped_std_streams.add(name)
+
+
+def _get_text_stdin(buffer_stream):
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedReader(_WindowsConsoleReader(STDIN_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return ConsoleStream(text_stream, buffer_stream)
+
+
+def _get_text_stdout(buffer_stream):
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedWriter(_WindowsConsoleWriter(STDOUT_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return ConsoleStream(text_stream, buffer_stream)
+
+
+def _get_text_stderr(buffer_stream):
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedWriter(_WindowsConsoleWriter(STDERR_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return ConsoleStream(text_stream, buffer_stream)
+
+
+if PY2:
+
+    def _hash_py_argv():
+        return zlib.crc32("\x00".join(sys.argv[1:]))
+
+    _initial_argv_hash = _hash_py_argv()
+
+    def _get_windows_argv():
+        argc = c_int(0)
+        argv_unicode = CommandLineToArgvW(GetCommandLineW(), byref(argc))
+        if not argv_unicode:
+            raise WinError()
+        try:
+            argv = [argv_unicode[i] for i in range(0, argc.value)]
+        finally:
+            LocalFree(argv_unicode)
+            del argv_unicode
+
+        if not hasattr(sys, "frozen"):
+            argv = argv[1:]
+            while len(argv) > 0:
+                arg = argv[0]
+                if not arg.startswith("-") or arg == "-":
+                    break
+                argv = argv[1:]
+                if arg.startswith(("-c", "-m")):
+                    break
+
+        return argv[1:]
+
+
+_stream_factories = {
+    0: _get_text_stdin,
+    1: _get_text_stdout,
+    2: _get_text_stderr,
+}
+
+
+def _is_console(f):
+    if not hasattr(f, "fileno"):
+        return False
+
+    try:
+        fileno = f.fileno()
+    except OSError:
+        return False
+
+    handle = msvcrt.get_osfhandle(fileno)
+    return bool(GetConsoleMode(handle, byref(DWORD())))
+
+
+def _get_windows_console_stream(f, encoding, errors):
+    if (
+        get_buffer is not None
+        and encoding in ("utf-16-le", None)
+        and errors in ("strict", None)
+        and _is_console(f)
+    ):
+        func = _stream_factories.get(f.fileno())
+        if func is not None:
+            if not PY2:
+                f = getattr(f, "buffer", None)
+                if f is None:
+                    return None
+            else:
+                # If we are on Python 2 we need to set the stream that we
+                # deal with to binary mode as otherwise the exercise if a
+                # bit moot.  The same problems apply as for
+                # get_binary_stdin and friends from _compat.
+                msvcrt.setmode(f.fileno(), os.O_BINARY)
+            return func(f)
--- a/matteo_env/Lib/site-packages/click/core.py
+++ b/matteo_env/Lib/site-packages/click/core.py
--- a/matteo_env/Lib/site-packages/click/decorators.py
+++ b/matteo_env/Lib/site-packages/click/decorators.py
@ -0,0 +1,333 @@
+import inspect
+import sys
+from functools import update_wrapper
+
+from ._compat import iteritems
+from ._unicodefun import _check_for_unicode_literals
+from .core import Argument
+from .core import Command
+from .core import Group
+from .core import Option
+from .globals import get_current_context
+from .utils import echo
+
+
+def pass_context(f):
+    """Marks a callback as wanting to receive the current context
+    object as first argument.
+    """
+
+    def new_func(*args, **kwargs):
+        return f(get_current_context(), *args, **kwargs)
+
+    return update_wrapper(new_func, f)
+
+
+def pass_obj(f):
+    """Similar to :func:`pass_context`, but only pass the object on the
+    context onwards (:attr:`Context.obj`).  This is useful if that object
+    represents the state of a nested system.
+    """
+
+    def new_func(*args, **kwargs):
+        return f(get_current_context().obj, *args, **kwargs)
+
+    return update_wrapper(new_func, f)
+
+
+def make_pass_decorator(object_type, ensure=False):
+    """Given an object type this creates a decorator that will work
+    similar to :func:`pass_obj` but instead of passing the object of the
+    current context, it will find the innermost context of type
+    :func:`object_type`.
+
+    This generates a decorator that works roughly like this::
+
+        from functools import update_wrapper
+
+        def decorator(f):
+            @pass_context
+            def new_func(ctx, *args, **kwargs):
+                obj = ctx.find_object(object_type)
+                return ctx.invoke(f, obj, *args, **kwargs)
+            return update_wrapper(new_func, f)
+        return decorator
+
+    :param object_type: the type of the object to pass.
+    :param ensure: if set to `True`, a new object will be created and
+                   remembered on the context if it's not there yet.
+    """
+
+    def decorator(f):
+        def new_func(*args, **kwargs):
+            ctx = get_current_context()
+            if ensure:
+                obj = ctx.ensure_object(object_type)
+            else:
+                obj = ctx.find_object(object_type)
+            if obj is None:
+                raise RuntimeError(
+                    "Managed to invoke callback without a context"
+                    " object of type '{}' existing".format(object_type.__name__)
+                )
+            return ctx.invoke(f, obj, *args, **kwargs)
+
+        return update_wrapper(new_func, f)
+
+    return decorator
+
+
+def _make_command(f, name, attrs, cls):
+    if isinstance(f, Command):
+        raise TypeError("Attempted to convert a callback into a command twice.")
+    try:
+        params = f.__click_params__
+        params.reverse()
+        del f.__click_params__
+    except AttributeError:
+        params = []
+    help = attrs.get("help")
+    if help is None:
+        help = inspect.getdoc(f)
+        if isinstance(help, bytes):
+            help = help.decode("utf-8")
+    else:
+        help = inspect.cleandoc(help)
+    attrs["help"] = help
+    _check_for_unicode_literals()
+    return cls(
+        name=name or f.__name__.lower().replace("_", "-"),
+        callback=f,
+        params=params,
+        **attrs
+    )
+
+
+def command(name=None, cls=None, **attrs):
+    r"""Creates a new :class:`Command` and uses the decorated function as
+    callback.  This will also automatically attach all decorated
+    :func:`option`\s and :func:`argument`\s as parameters to the command.
+
+    The name of the command defaults to the name of the function with
+    underscores replaced by dashes.  If you want to change that, you can
+    pass the intended name as the first argument.
+
+    All keyword arguments are forwarded to the underlying command class.
+
+    Once decorated the function turns into a :class:`Command` instance
+    that can be invoked as a command line utility or be attached to a
+    command :class:`Group`.
+
+    :param name: the name of the command.  This defaults to the function
+                 name with underscores replaced by dashes.
+    :param cls: the command class to instantiate.  This defaults to
+                :class:`Command`.
+    """
+    if cls is None:
+        cls = Command
+
+    def decorator(f):
+        cmd = _make_command(f, name, attrs, cls)
+        cmd.__doc__ = f.__doc__
+        return cmd
+
+    return decorator
+
+
+def group(name=None, **attrs):
+    """Creates a new :class:`Group` with a function as callback.  This
+    works otherwise the same as :func:`command` just that the `cls`
+    parameter is set to :class:`Group`.
+    """
+    attrs.setdefault("cls", Group)
+    return command(name, **attrs)
+
+
+def _param_memo(f, param):
+    if isinstance(f, Command):
+        f.params.append(param)
+    else:
+        if not hasattr(f, "__click_params__"):
+            f.__click_params__ = []
+        f.__click_params__.append(param)
+
+
+def argument(*param_decls, **attrs):
+    """Attaches an argument to the command.  All positional arguments are
+    passed as parameter declarations to :class:`Argument`; all keyword
+    arguments are forwarded unchanged (except ``cls``).
+    This is equivalent to creating an :class:`Argument` instance manually
+    and attaching it to the :attr:`Command.params` list.
+
+    :param cls: the argument class to instantiate.  This defaults to
+                :class:`Argument`.
+    """
+
+    def decorator(f):
+        ArgumentClass = attrs.pop("cls", Argument)
+        _param_memo(f, ArgumentClass(param_decls, **attrs))
+        return f
+
+    return decorator
+
+
+def option(*param_decls, **attrs):
+    """Attaches an option to the command.  All positional arguments are
+    passed as parameter declarations to :class:`Option`; all keyword
+    arguments are forwarded unchanged (except ``cls``).
+    This is equivalent to creating an :class:`Option` instance manually
+    and attaching it to the :attr:`Command.params` list.
+
+    :param cls: the option class to instantiate.  This defaults to
+                :class:`Option`.
+    """
+
+    def decorator(f):
+        # Issue 926, copy attrs, so pre-defined options can re-use the same cls=
+        option_attrs = attrs.copy()
+
+        if "help" in option_attrs:
+            option_attrs["help"] = inspect.cleandoc(option_attrs["help"])
+        OptionClass = option_attrs.pop("cls", Option)
+        _param_memo(f, OptionClass(param_decls, **option_attrs))
+        return f
+
+    return decorator
+
+
+def confirmation_option(*param_decls, **attrs):
+    """Shortcut for confirmation prompts that can be ignored by passing
+    ``--yes`` as parameter.
+
+    This is equivalent to decorating a function with :func:`option` with
+    the following parameters::
+
+        def callback(ctx, param, value):
+            if not value:
+                ctx.abort()
+
+        @click.command()
+        @click.option('--yes', is_flag=True, callback=callback,
+                      expose_value=False, prompt='Do you want to continue?')
+        def dropdb():
+            pass
+    """
+
+    def decorator(f):
+        def callback(ctx, param, value):
+            if not value:
+                ctx.abort()
+
+        attrs.setdefault("is_flag", True)
+        attrs.setdefault("callback", callback)
+        attrs.setdefault("expose_value", False)
+        attrs.setdefault("prompt", "Do you want to continue?")
+        attrs.setdefault("help", "Confirm the action without prompting.")
+        return option(*(param_decls or ("--yes",)), **attrs)(f)
+
+    return decorator
+
+
+def password_option(*param_decls, **attrs):
+    """Shortcut for password prompts.
+
+    This is equivalent to decorating a function with :func:`option` with
+    the following parameters::
+
+        @click.command()
+        @click.option('--password', prompt=True, confirmation_prompt=True,
+                      hide_input=True)
+        def changeadmin(password):
+            pass
+    """
+
+    def decorator(f):
+        attrs.setdefault("prompt", True)
+        attrs.setdefault("confirmation_prompt", True)
+        attrs.setdefault("hide_input", True)
+        return option(*(param_decls or ("--password",)), **attrs)(f)
+
+    return decorator
+
+
+def version_option(version=None, *param_decls, **attrs):
+    """Adds a ``--version`` option which immediately ends the program
+    printing out the version number.  This is implemented as an eager
+    option that prints the version and exits the program in the callback.
+
+    :param version: the version number to show.  If not provided Click
+                    attempts an auto discovery via setuptools.
+    :param prog_name: the name of the program (defaults to autodetection)
+    :param message: custom message to show instead of the default
+                    (``'%(prog)s, version %(version)s'``)
+    :param others: everything else is forwarded to :func:`option`.
+    """
+    if version is None:
+        if hasattr(sys, "_getframe"):
+            module = sys._getframe(1).f_globals.get("__name__")
+        else:
+            module = ""
+
+    def decorator(f):
+        prog_name = attrs.pop("prog_name", None)
+        message = attrs.pop("message", "%(prog)s, version %(version)s")
+
+        def callback(ctx, param, value):
+            if not value or ctx.resilient_parsing:
+                return
+            prog = prog_name
+            if prog is None:
+                prog = ctx.find_root().info_name
+            ver = version
+            if ver is None:
+                try:
+                    import pkg_resources
+                except ImportError:
+                    pass
+                else:
+                    for dist in pkg_resources.working_set:
+                        scripts = dist.get_entry_map().get("console_scripts") or {}
+                        for _, entry_point in iteritems(scripts):
+                            if entry_point.module_name == module:
+                                ver = dist.version
+                                break
+                if ver is None:
+                    raise RuntimeError("Could not determine version")
+            echo(message % {"prog": prog, "version": ver}, color=ctx.color)
+            ctx.exit()
+
+        attrs.setdefault("is_flag", True)
+        attrs.setdefault("expose_value", False)
+        attrs.setdefault("is_eager", True)
+        attrs.setdefault("help", "Show the version and exit.")
+        attrs["callback"] = callback
+        return option(*(param_decls or ("--version",)), **attrs)(f)
+
+    return decorator
+
+
+def help_option(*param_decls, **attrs):
+    """Adds a ``--help`` option which immediately ends the program
+    printing out the help page.  This is usually unnecessary to add as
+    this is added by default to all commands unless suppressed.
+
+    Like :func:`version_option`, this is implemented as eager option that
+    prints in the callback and exits.
+
+    All arguments are forwarded to :func:`option`.
+    """
+
+    def decorator(f):
+        def callback(ctx, param, value):
+            if value and not ctx.resilient_parsing:
+                echo(ctx.get_help(), color=ctx.color)
+                ctx.exit()
+
+        attrs.setdefault("is_flag", True)
+        attrs.setdefault("expose_value", False)
+        attrs.setdefault("help", "Show this message and exit.")
+        attrs.setdefault("is_eager", True)
+        attrs["callback"] = callback
+        return option(*(param_decls or ("--help",)), **attrs)(f)
+
+    return decorator
--- a/matteo_env/Lib/site-packages/click/exceptions.py
+++ b/matteo_env/Lib/site-packages/click/exceptions.py
@ -0,0 +1,253 @@
+from ._compat import filename_to_ui
+from ._compat import get_text_stderr
+from ._compat import PY2
+from .utils import echo
+
+
+def _join_param_hints(param_hint):
+    if isinstance(param_hint, (tuple, list)):
+        return " / ".join(repr(x) for x in param_hint)
+    return param_hint
+
+
+class ClickException(Exception):
+    """An exception that Click can handle and show to the user."""
+
+    #: The exit code for this exception
+    exit_code = 1
+
+    def __init__(self, message):
+        ctor_msg = message
+        if PY2:
+            if ctor_msg is not None:
+                ctor_msg = ctor_msg.encode("utf-8")
+        Exception.__init__(self, ctor_msg)
+        self.message = message
+
+    def format_message(self):
+        return self.message
+
+    def __str__(self):
+        return self.message
+
+    if PY2:
+        __unicode__ = __str__
+
+        def __str__(self):
+            return self.message.encode("utf-8")
+
+    def show(self, file=None):
+        if file is None:
+            file = get_text_stderr()
+        echo("Error: {}".format(self.format_message()), file=file)
+
+
+class UsageError(ClickException):
+    """An internal exception that signals a usage error.  This typically
+    aborts any further handling.
+
+    :param message: the error message to display.
+    :param ctx: optionally the context that caused this error.  Click will
+                fill in the context automatically in some situations.
+    """
+
+    exit_code = 2
+
+    def __init__(self, message, ctx=None):
+        ClickException.__init__(self, message)
+        self.ctx = ctx
+        self.cmd = self.ctx.command if self.ctx else None
+
+    def show(self, file=None):
+        if file is None:
+            file = get_text_stderr()
+        color = None
+        hint = ""
+        if self.cmd is not None and self.cmd.get_help_option(self.ctx) is not None:
+            hint = "Try '{} {}' for help.\n".format(
+                self.ctx.command_path, self.ctx.help_option_names[0]
+            )
+        if self.ctx is not None:
+            color = self.ctx.color
+            echo("{}\n{}".format(self.ctx.get_usage(), hint), file=file, color=color)
+        echo("Error: {}".format(self.format_message()), file=file, color=color)
+
+
+class BadParameter(UsageError):
+    """An exception that formats out a standardized error message for a
+    bad parameter.  This is useful when thrown from a callback or type as
+    Click will attach contextual information to it (for instance, which
+    parameter it is).
+
+    .. versionadded:: 2.0
+
+    :param param: the parameter object that caused this error.  This can
+                  be left out, and Click will attach this info itself
+                  if possible.
+    :param param_hint: a string that shows up as parameter name.  This
+                       can be used as alternative to `param` in cases
+                       where custom validation should happen.  If it is
+                       a string it's used as such, if it's a list then
+                       each item is quoted and separated.
+    """
+
+    def __init__(self, message, ctx=None, param=None, param_hint=None):
+        UsageError.__init__(self, message, ctx)
+        self.param = param
+        self.param_hint = param_hint
+
+    def format_message(self):
+        if self.param_hint is not None:
+            param_hint = self.param_hint
+        elif self.param is not None:
+            param_hint = self.param.get_error_hint(self.ctx)
+        else:
+            return "Invalid value: {}".format(self.message)
+        param_hint = _join_param_hints(param_hint)
+
+        return "Invalid value for {}: {}".format(param_hint, self.message)
+
+
+class MissingParameter(BadParameter):
+    """Raised if click required an option or argument but it was not
+    provided when invoking the script.
+
+    .. versionadded:: 4.0
+
+    :param param_type: a string that indicates the type of the parameter.
+                       The default is to inherit the parameter type from
+                       the given `param`.  Valid values are ``'parameter'``,
+                       ``'option'`` or ``'argument'``.
+    """
+
+    def __init__(
+        self, message=None, ctx=None, param=None, param_hint=None, param_type=None
+    ):
+        BadParameter.__init__(self, message, ctx, param, param_hint)
+        self.param_type = param_type
+
+    def format_message(self):
+        if self.param_hint is not None:
+            param_hint = self.param_hint
+        elif self.param is not None:
+            param_hint = self.param.get_error_hint(self.ctx)
+        else:
+            param_hint = None
+        param_hint = _join_param_hints(param_hint)
+
+        param_type = self.param_type
+        if param_type is None and self.param is not None:
+            param_type = self.param.param_type_name
+
+        msg = self.message
+        if self.param is not None:
+            msg_extra = self.param.type.get_missing_message(self.param)
+            if msg_extra:
+                if msg:
+                    msg += ".  {}".format(msg_extra)
+                else:
+                    msg = msg_extra
+
+        return "Missing {}{}{}{}".format(
+            param_type,
+            " {}".format(param_hint) if param_hint else "",
+            ".  " if msg else ".",
+            msg or "",
+        )
+
+    def __str__(self):
+        if self.message is None:
+            param_name = self.param.name if self.param else None
+            return "missing parameter: {}".format(param_name)
+        else:
+            return self.message
+
+    if PY2:
+        __unicode__ = __str__
+
+        def __str__(self):
+            return self.__unicode__().encode("utf-8")
+
+
+class NoSuchOption(UsageError):
+    """Raised if click attempted to handle an option that does not
+    exist.
+
+    .. versionadded:: 4.0
+    """
+
+    def __init__(self, option_name, message=None, possibilities=None, ctx=None):
+        if message is None:
+            message = "no such option: {}".format(option_name)
+        UsageError.__init__(self, message, ctx)
+        self.option_name = option_name
+        self.possibilities = possibilities
+
+    def format_message(self):
+        bits = [self.message]
+        if self.possibilities:
+            if len(self.possibilities) == 1:
+                bits.append("Did you mean {}?".format(self.possibilities[0]))
+            else:
+                possibilities = sorted(self.possibilities)
+                bits.append("(Possible options: {})".format(", ".join(possibilities)))
+        return "  ".join(bits)
+
+
+class BadOptionUsage(UsageError):
+    """Raised if an option is generally supplied but the use of the option
+    was incorrect.  This is for instance raised if the number of arguments
+    for an option is not correct.
+
+    .. versionadded:: 4.0
+
+    :param option_name: the name of the option being used incorrectly.
+    """
+
+    def __init__(self, option_name, message, ctx=None):
+        UsageError.__init__(self, message, ctx)
+        self.option_name = option_name
+
+
+class BadArgumentUsage(UsageError):
+    """Raised if an argument is generally supplied but the use of the argument
+    was incorrect.  This is for instance raised if the number of values
+    for an argument is not correct.
+
+    .. versionadded:: 6.0
+    """
+
+    def __init__(self, message, ctx=None):
+        UsageError.__init__(self, message, ctx)
+
+
+class FileError(ClickException):
+    """Raised if a file cannot be opened."""
+
+    def __init__(self, filename, hint=None):
+        ui_filename = filename_to_ui(filename)
+        if hint is None:
+            hint = "unknown error"
+        ClickException.__init__(self, hint)
+        self.ui_filename = ui_filename
+        self.filename = filename
+
+    def format_message(self):
+        return "Could not open file {}: {}".format(self.ui_filename, self.message)
+
+
+class Abort(RuntimeError):
+    """An internal signalling exception that signals Click to abort."""
+
+
+class Exit(RuntimeError):
+    """An exception that indicates that the application should exit with some
+    status code.
+
+    :param code: the status code to exit with.
+    """
+
+    __slots__ = ("exit_code",)
+
+    def __init__(self, code=0):
+        self.exit_code = code
--- a/matteo_env/Lib/site-packages/click/formatting.py
+++ b/matteo_env/Lib/site-packages/click/formatting.py
@ -0,0 +1,283 @@
+from contextlib import contextmanager
+
+from ._compat import term_len
+from .parser import split_opt
+from .termui import get_terminal_size
+
+# Can force a width.  This is used by the test system
+FORCED_WIDTH = None
+
+
+def measure_table(rows):
+    widths = {}
+    for row in rows:
+        for idx, col in enumerate(row):
+            widths[idx] = max(widths.get(idx, 0), term_len(col))
+    return tuple(y for x, y in sorted(widths.items()))
+
+
+def iter_rows(rows, col_count):
+    for row in rows:
+        row = tuple(row)
+        yield row + ("",) * (col_count - len(row))
+
+
+def wrap_text(
+    text, width=78, initial_indent="", subsequent_indent="", preserve_paragraphs=False
+):
+    """A helper function that intelligently wraps text.  By default, it
+    assumes that it operates on a single paragraph of text but if the
+    `preserve_paragraphs` parameter is provided it will intelligently
+    handle paragraphs (defined by two empty lines).
+
+    If paragraphs are handled, a paragraph can be prefixed with an empty
+    line containing the ``\\b`` character (``\\x08``) to indicate that
+    no rewrapping should happen in that block.
+
+    :param text: the text that should be rewrapped.
+    :param width: the maximum width for the text.
+    :param initial_indent: the initial indent that should be placed on the
+                           first line as a string.
+    :param subsequent_indent: the indent string that should be placed on
+                              each consecutive line.
+    :param preserve_paragraphs: if this flag is set then the wrapping will
+                                intelligently handle paragraphs.
+    """
+    from ._textwrap import TextWrapper
+
+    text = text.expandtabs()
+    wrapper = TextWrapper(
+        width,
+        initial_indent=initial_indent,
+        subsequent_indent=subsequent_indent,
+        replace_whitespace=False,
+    )
+    if not preserve_paragraphs:
+        return wrapper.fill(text)
+
+    p = []
+    buf = []
+    indent = None
+
+    def _flush_par():
+        if not buf:
+            return
+        if buf[0].strip() == "\b":
+            p.append((indent or 0, True, "\n".join(buf[1:])))
+        else:
+            p.append((indent or 0, False, " ".join(buf)))
+        del buf[:]
+
+    for line in text.splitlines():
+        if not line:
+            _flush_par()
+            indent = None
+        else:
+            if indent is None:
+                orig_len = term_len(line)
+                line = line.lstrip()
+                indent = orig_len - term_len(line)
+            buf.append(line)
+    _flush_par()
+
+    rv = []
+    for indent, raw, text in p:
+        with wrapper.extra_indent(" " * indent):
+            if raw:
+                rv.append(wrapper.indent_only(text))
+            else:
+                rv.append(wrapper.fill(text))
+
+    return "\n\n".join(rv)
+
+
+class HelpFormatter(object):
+    """This class helps with formatting text-based help pages.  It's
+    usually just needed for very special internal cases, but it's also
+    exposed so that developers can write their own fancy outputs.
+
+    At present, it always writes into memory.
+
+    :param indent_increment: the additional increment for each level.
+    :param width: the width for the text.  This defaults to the terminal
+                  width clamped to a maximum of 78.
+    """
+
+    def __init__(self, indent_increment=2, width=None, max_width=None):
+        self.indent_increment = indent_increment
+        if max_width is None:
+            max_width = 80
+        if width is None:
+            width = FORCED_WIDTH
+            if width is None:
+                width = max(min(get_terminal_size()[0], max_width) - 2, 50)
+        self.width = width
+        self.current_indent = 0
+        self.buffer = []
+
+    def write(self, string):
+        """Writes a unicode string into the internal buffer."""
+        self.buffer.append(string)
+
+    def indent(self):
+        """Increases the indentation."""
+        self.current_indent += self.indent_increment
+
+    def dedent(self):
+        """Decreases the indentation."""
+        self.current_indent -= self.indent_increment
+
+    def write_usage(self, prog, args="", prefix="Usage: "):
+        """Writes a usage line into the buffer.
+
+        :param prog: the program name.
+        :param args: whitespace separated list of arguments.
+        :param prefix: the prefix for the first line.
+        """
+        usage_prefix = "{:>{w}}{} ".format(prefix, prog, w=self.current_indent)
+        text_width = self.width - self.current_indent
+
+        if text_width >= (term_len(usage_prefix) + 20):
+            # The arguments will fit to the right of the prefix.
+            indent = " " * term_len(usage_prefix)
+            self.write(
+                wrap_text(
+                    args,
+                    text_width,
+                    initial_indent=usage_prefix,
+                    subsequent_indent=indent,
+                )
+            )
+        else:
+            # The prefix is too long, put the arguments on the next line.
+            self.write(usage_prefix)
+            self.write("\n")
+            indent = " " * (max(self.current_indent, term_len(prefix)) + 4)
+            self.write(
+                wrap_text(
+                    args, text_width, initial_indent=indent, subsequent_indent=indent
+                )
+            )
+
+        self.write("\n")
+
+    def write_heading(self, heading):
+        """Writes a heading into the buffer."""
+        self.write("{:>{w}}{}:\n".format("", heading, w=self.current_indent))
+
+    def write_paragraph(self):
+        """Writes a paragraph into the buffer."""
+        if self.buffer:
+            self.write("\n")
+
+    def write_text(self, text):
+        """Writes re-indented text into the buffer.  This rewraps and
+        preserves paragraphs.
+        """
+        text_width = max(self.width - self.current_indent, 11)
+        indent = " " * self.current_indent
+        self.write(
+            wrap_text(
+                text,
+                text_width,
+                initial_indent=indent,
+                subsequent_indent=indent,
+                preserve_paragraphs=True,
+            )
+        )
+        self.write("\n")
+
+    def write_dl(self, rows, col_max=30, col_spacing=2):
+        """Writes a definition list into the buffer.  This is how options
+        and commands are usually formatted.
+
+        :param rows: a list of two item tuples for the terms and values.
+        :param col_max: the maximum width of the first column.
+        :param col_spacing: the number of spaces between the first and
+                            second column.
+        """
+        rows = list(rows)
+        widths = measure_table(rows)
+        if len(widths) != 2:
+            raise TypeError("Expected two columns for definition list")
+
+        first_col = min(widths[0], col_max) + col_spacing
+
+        for first, second in iter_rows(rows, len(widths)):
+            self.write("{:>{w}}{}".format("", first, w=self.current_indent))
+            if not second:
+                self.write("\n")
+                continue
+            if term_len(first) <= first_col - col_spacing:
+                self.write(" " * (first_col - term_len(first)))
+            else:
+                self.write("\n")
+                self.write(" " * (first_col + self.current_indent))
+
+            text_width = max(self.width - first_col - 2, 10)
+            wrapped_text = wrap_text(second, text_width, preserve_paragraphs=True)
+            lines = wrapped_text.splitlines()
+
+            if lines:
+                self.write("{}\n".format(lines[0]))
+
+                for line in lines[1:]:
+                    self.write(
+                        "{:>{w}}{}\n".format(
+                            "", line, w=first_col + self.current_indent
+                        )
+                    )
+
+                if len(lines) > 1:
+                    # separate long help from next option
+                    self.write("\n")
+            else:
+                self.write("\n")
+
+    @contextmanager
+    def section(self, name):
+        """Helpful context manager that writes a paragraph, a heading,
+        and the indents.
+
+        :param name: the section name that is written as heading.
+        """
+        self.write_paragraph()
+        self.write_heading(name)
+        self.indent()
+        try:
+            yield
+        finally:
+            self.dedent()
+
+    @contextmanager
+    def indentation(self):
+        """A context manager that increases the indentation."""
+        self.indent()
+        try:
+            yield
+        finally:
+            self.dedent()
+
+    def getvalue(self):
+        """Returns the buffer contents."""
+        return "".join(self.buffer)
+
+
+def join_options(options):
+    """Given a list of option strings this joins them in the most appropriate
+    way and returns them in the form ``(formatted_string,
+    any_prefix_is_slash)`` where the second item in the tuple is a flag that
+    indicates if any of the option prefixes was a slash.
+    """
+    rv = []
+    any_prefix_is_slash = False
+    for opt in options:
+        prefix = split_opt(opt)[0]
+        if prefix == "/":
+            any_prefix_is_slash = True
+        rv.append((len(prefix), opt))
+
+    rv.sort(key=lambda x: x[0])
+
+    rv = ", ".join(x[1] for x in rv)
+    return rv, any_prefix_is_slash
--- a/matteo_env/Lib/site-packages/click/globals.py
+++ b/matteo_env/Lib/site-packages/click/globals.py
@ -0,0 +1,47 @@
+from threading import local
+
+_local = local()
+
+
+def get_current_context(silent=False):
+    """Returns the current click context.  This can be used as a way to
+    access the current context object from anywhere.  This is a more implicit
+    alternative to the :func:`pass_context` decorator.  This function is
+    primarily useful for helpers such as :func:`echo` which might be
+    interested in changing its behavior based on the current context.
+
+    To push the current context, :meth:`Context.scope` can be used.
+
+    .. versionadded:: 5.0
+
+    :param silent: if set to `True` the return value is `None` if no context
+                   is available.  The default behavior is to raise a
+                   :exc:`RuntimeError`.
+    """
+    try:
+        return _local.stack[-1]
+    except (AttributeError, IndexError):
+        if not silent:
+            raise RuntimeError("There is no active click context.")
+
+
+def push_context(ctx):
+    """Pushes a new context to the current stack."""
+    _local.__dict__.setdefault("stack", []).append(ctx)
+
+
+def pop_context():
+    """Removes the top level from the stack."""
+    _local.stack.pop()
+
+
+def resolve_color_default(color=None):
+    """"Internal helper to get the default value of the color flag.  If a
+    value is passed it's returned unchanged, otherwise it's looked up from
+    the current context.
+    """
+    if color is not None:
+        return color
+    ctx = get_current_context(silent=True)
+    if ctx is not None:
+        return ctx.color
--- a/matteo_env/Lib/site-packages/click/parser.py
+++ b/matteo_env/Lib/site-packages/click/parser.py
@ -0,0 +1,428 @@
+# -*- coding: utf-8 -*-
+"""
+This module started out as largely a copy paste from the stdlib's
+optparse module with the features removed that we do not need from
+optparse because we implement them in Click on a higher level (for
+instance type handling, help formatting and a lot more).
+
+The plan is to remove more and more from here over time.
+
+The reason this is a different module and not optparse from the stdlib
+is that there are differences in 2.x and 3.x about the error messages
+generated and optparse in the stdlib uses gettext for no good reason
+and might cause us issues.
+
+Click uses parts of optparse written by Gregory P. Ward and maintained
+by the Python Software Foundation. This is limited to code in parser.py.
+
+Copyright 2001-2006 Gregory P. Ward. All rights reserved.
+Copyright 2002-2006 Python Software Foundation. All rights reserved.
+"""
+import re
+from collections import deque
+
+from .exceptions import BadArgumentUsage
+from .exceptions import BadOptionUsage
+from .exceptions import NoSuchOption
+from .exceptions import UsageError
+
+
+def _unpack_args(args, nargs_spec):
+    """Given an iterable of arguments and an iterable of nargs specifications,
+    it returns a tuple with all the unpacked arguments at the first index
+    and all remaining arguments as the second.
+
+    The nargs specification is the number of arguments that should be consumed
+    or `-1` to indicate that this position should eat up all the remainders.
+
+    Missing items are filled with `None`.
+    """
+    args = deque(args)
+    nargs_spec = deque(nargs_spec)
+    rv = []
+    spos = None
+
+    def _fetch(c):
+        try:
+            if spos is None:
+                return c.popleft()
+            else:
+                return c.pop()
+        except IndexError:
+            return None
+
+    while nargs_spec:
+        nargs = _fetch(nargs_spec)
+        if nargs == 1:
+            rv.append(_fetch(args))
+        elif nargs > 1:
+            x = [_fetch(args) for _ in range(nargs)]
+            # If we're reversed, we're pulling in the arguments in reverse,
+            # so we need to turn them around.
+            if spos is not None:
+                x.reverse()
+            rv.append(tuple(x))
+        elif nargs < 0:
+            if spos is not None:
+                raise TypeError("Cannot have two nargs < 0")
+            spos = len(rv)
+            rv.append(None)
+
+    # spos is the position of the wildcard (star).  If it's not `None`,
+    # we fill it with the remainder.
+    if spos is not None:
+        rv[spos] = tuple(args)
+        args = []
+        rv[spos + 1 :] = reversed(rv[spos + 1 :])
+
+    return tuple(rv), list(args)
+
+
+def _error_opt_args(nargs, opt):
+    if nargs == 1:
+        raise BadOptionUsage(opt, "{} option requires an argument".format(opt))
+    raise BadOptionUsage(opt, "{} option requires {} arguments".format(opt, nargs))
+
+
+def split_opt(opt):
+    first = opt[:1]
+    if first.isalnum():
+        return "", opt
+    if opt[1:2] == first:
+        return opt[:2], opt[2:]
+    return first, opt[1:]
+
+
+def normalize_opt(opt, ctx):
+    if ctx is None or ctx.token_normalize_func is None:
+        return opt
+    prefix, opt = split_opt(opt)
+    return prefix + ctx.token_normalize_func(opt)
+
+
+def split_arg_string(string):
+    """Given an argument string this attempts to split it into small parts."""
+    rv = []
+    for match in re.finditer(
+        r"('([^'\\]*(?:\\.[^'\\]*)*)'|\"([^\"\\]*(?:\\.[^\"\\]*)*)\"|\S+)\s*",
+        string,
+        re.S,
+    ):
+        arg = match.group().strip()
+        if arg[:1] == arg[-1:] and arg[:1] in "\"'":
+            arg = arg[1:-1].encode("ascii", "backslashreplace").decode("unicode-escape")
+        try:
+            arg = type(string)(arg)
+        except UnicodeError:
+            pass
+        rv.append(arg)
+    return rv
+
+
+class Option(object):
+    def __init__(self, opts, dest, action=None, nargs=1, const=None, obj=None):
+        self._short_opts = []
+        self._long_opts = []
+        self.prefixes = set()
+
+        for opt in opts:
+            prefix, value = split_opt(opt)
+            if not prefix:
+                raise ValueError("Invalid start character for option ({})".format(opt))
+            self.prefixes.add(prefix[0])
+            if len(prefix) == 1 and len(value) == 1:
+                self._short_opts.append(opt)
+            else:
+                self._long_opts.append(opt)
+                self.prefixes.add(prefix)
+
+        if action is None:
+            action = "store"
+
+        self.dest = dest
+        self.action = action
+        self.nargs = nargs
+        self.const = const
+        self.obj = obj
+
+    @property
+    def takes_value(self):
+        return self.action in ("store", "append")
+
+    def process(self, value, state):
+        if self.action == "store":
+            state.opts[self.dest] = value
+        elif self.action == "store_const":
+            state.opts[self.dest] = self.const
+        elif self.action == "append":
+            state.opts.setdefault(self.dest, []).append(value)
+        elif self.action == "append_const":
+            state.opts.setdefault(self.dest, []).append(self.const)
+        elif self.action == "count":
+            state.opts[self.dest] = state.opts.get(self.dest, 0) + 1
+        else:
+            raise ValueError("unknown action '{}'".format(self.action))
+        state.order.append(self.obj)
+
+
+class Argument(object):
+    def __init__(self, dest, nargs=1, obj=None):
+        self.dest = dest
+        self.nargs = nargs
+        self.obj = obj
+
+    def process(self, value, state):
+        if self.nargs > 1:
+            holes = sum(1 for x in value if x is None)
+            if holes == len(value):
+                value = None
+            elif holes != 0:
+                raise BadArgumentUsage(
+                    "argument {} takes {} values".format(self.dest, self.nargs)
+                )
+        state.opts[self.dest] = value
+        state.order.append(self.obj)
+
+
+class ParsingState(object):
+    def __init__(self, rargs):
+        self.opts = {}
+        self.largs = []
+        self.rargs = rargs
+        self.order = []
+
+
+class OptionParser(object):
+    """The option parser is an internal class that is ultimately used to
+    parse options and arguments.  It's modelled after optparse and brings
+    a similar but vastly simplified API.  It should generally not be used
+    directly as the high level Click classes wrap it for you.
+
+    It's not nearly as extensible as optparse or argparse as it does not
+    implement features that are implemented on a higher level (such as
+    types or defaults).
+
+    :param ctx: optionally the :class:`~click.Context` where this parser
+                should go with.
+    """
+
+    def __init__(self, ctx=None):
+        #: The :class:`~click.Context` for this parser.  This might be
+        #: `None` for some advanced use cases.
+        self.ctx = ctx
+        #: This controls how the parser deals with interspersed arguments.
+        #: If this is set to `False`, the parser will stop on the first
+        #: non-option.  Click uses this to implement nested subcommands
+        #: safely.
+        self.allow_interspersed_args = True
+        #: This tells the parser how to deal with unknown options.  By
+        #: default it will error out (which is sensible), but there is a
+        #: second mode where it will ignore it and continue processing
+        #: after shifting all the unknown options into the resulting args.
+        self.ignore_unknown_options = False
+        if ctx is not None:
+            self.allow_interspersed_args = ctx.allow_interspersed_args
+            self.ignore_unknown_options = ctx.ignore_unknown_options
+        self._short_opt = {}
+        self._long_opt = {}
+        self._opt_prefixes = {"-", "--"}
+        self._args = []
+
+    def add_option(self, opts, dest, action=None, nargs=1, const=None, obj=None):
+        """Adds a new option named `dest` to the parser.  The destination
+        is not inferred (unlike with optparse) and needs to be explicitly
+        provided.  Action can be any of ``store``, ``store_const``,
+        ``append``, ``appnd_const`` or ``count``.
+
+        The `obj` can be used to identify the option in the order list
+        that is returned from the parser.
+        """
+        if obj is None:
+            obj = dest
+        opts = [normalize_opt(opt, self.ctx) for opt in opts]
+        option = Option(opts, dest, action=action, nargs=nargs, const=const, obj=obj)
+        self._opt_prefixes.update(option.prefixes)
+        for opt in option._short_opts:
+            self._short_opt[opt] = option
+        for opt in option._long_opts:
+            self._long_opt[opt] = option
+
+    def add_argument(self, dest, nargs=1, obj=None):
+        """Adds a positional argument named `dest` to the parser.
+
+        The `obj` can be used to identify the option in the order list
+        that is returned from the parser.
+        """
+        if obj is None:
+            obj = dest
+        self._args.append(Argument(dest=dest, nargs=nargs, obj=obj))
+
+    def parse_args(self, args):
+        """Parses positional arguments and returns ``(values, args, order)``
+        for the parsed options and arguments as well as the leftover
+        arguments if there are any.  The order is a list of objects as they
+        appear on the command line.  If arguments appear multiple times they
+        will be memorized multiple times as well.
+        """
+        state = ParsingState(args)
+        try:
+            self._process_args_for_options(state)
+            self._process_args_for_args(state)
+        except UsageError:
+            if self.ctx is None or not self.ctx.resilient_parsing:
+                raise
+        return state.opts, state.largs, state.order
+
+    def _process_args_for_args(self, state):
+        pargs, args = _unpack_args(
+            state.largs + state.rargs, [x.nargs for x in self._args]
+        )
+
+        for idx, arg in enumerate(self._args):
+            arg.process(pargs[idx], state)
+
+        state.largs = args
+        state.rargs = []
+
+    def _process_args_for_options(self, state):
+        while state.rargs:
+            arg = state.rargs.pop(0)
+            arglen = len(arg)
+            # Double dashes always handled explicitly regardless of what
+            # prefixes are valid.
+            if arg == "--":
+                return
+            elif arg[:1] in self._opt_prefixes and arglen > 1:
+                self._process_opts(arg, state)
+            elif self.allow_interspersed_args:
+                state.largs.append(arg)
+            else:
+                state.rargs.insert(0, arg)
+                return
+
+        # Say this is the original argument list:
+        # [arg0, arg1, ..., arg(i-1), arg(i), arg(i+1), ..., arg(N-1)]
+        #                            ^
+        # (we are about to process arg(i)).
+        #
+        # Then rargs is [arg(i), ..., arg(N-1)] and largs is a *subset* of
+        # [arg0, ..., arg(i-1)] (any options and their arguments will have
+        # been removed from largs).
+        #
+        # The while loop will usually consume 1 or more arguments per pass.
+        # If it consumes 1 (eg. arg is an option that takes no arguments),
+        # then after _process_arg() is done the situation is:
+        #
+        #   largs = subset of [arg0, ..., arg(i)]
+        #   rargs = [arg(i+1), ..., arg(N-1)]
+        #
+        # If allow_interspersed_args is false, largs will always be
+        # *empty* -- still a subset of [arg0, ..., arg(i-1)], but
+        # not a very interesting subset!
+
+    def _match_long_opt(self, opt, explicit_value, state):
+        if opt not in self._long_opt:
+            possibilities = [word for word in self._long_opt if word.startswith(opt)]
+            raise NoSuchOption(opt, possibilities=possibilities, ctx=self.ctx)
+
+        option = self._long_opt[opt]
+        if option.takes_value:
+            # At this point it's safe to modify rargs by injecting the
+            # explicit value, because no exception is raised in this
+            # branch.  This means that the inserted value will be fully
+            # consumed.
+            if explicit_value is not None:
+                state.rargs.insert(0, explicit_value)
+
+            nargs = option.nargs
+            if len(state.rargs) < nargs:
+                _error_opt_args(nargs, opt)
+            elif nargs == 1:
+                value = state.rargs.pop(0)
+            else:
+                value = tuple(state.rargs[:nargs])
+                del state.rargs[:nargs]
+
+        elif explicit_value is not None:
+            raise BadOptionUsage(opt, "{} option does not take a value".format(opt))
+
+        else:
+            value = None
+
+        option.process(value, state)
+
+    def _match_short_opt(self, arg, state):
+        stop = False
+        i = 1
+        prefix = arg[0]
+        unknown_options = []
+
+        for ch in arg[1:]:
+            opt = normalize_opt(prefix + ch, self.ctx)
+            option = self._short_opt.get(opt)
+            i += 1
+
+            if not option:
+                if self.ignore_unknown_options:
+                    unknown_options.append(ch)
+                    continue
+                raise NoSuchOption(opt, ctx=self.ctx)
+            if option.takes_value:
+                # Any characters left in arg?  Pretend they're the
+                # next arg, and stop consuming characters of arg.
+                if i < len(arg):
+                    state.rargs.insert(0, arg[i:])
+                    stop = True
+
+                nargs = option.nargs
+                if len(state.rargs) < nargs:
+                    _error_opt_args(nargs, opt)
+                elif nargs == 1:
+                    value = state.rargs.pop(0)
+                else:
+                    value = tuple(state.rargs[:nargs])
+                    del state.rargs[:nargs]
+
+            else:
+                value = None
+
+            option.process(value, state)
+
+            if stop:
+                break
+
+        # If we got any unknown options we re-combinate the string of the
+        # remaining options and re-attach the prefix, then report that
+        # to the state as new larg.  This way there is basic combinatorics
+        # that can be achieved while still ignoring unknown arguments.
+        if self.ignore_unknown_options and unknown_options:
+            state.largs.append("{}{}".format(prefix, "".join(unknown_options)))
+
+    def _process_opts(self, arg, state):
+        explicit_value = None
+        # Long option handling happens in two parts.  The first part is
+        # supporting explicitly attached values.  In any case, we will try
+        # to long match the option first.
+        if "=" in arg:
+            long_opt, explicit_value = arg.split("=", 1)
+        else:
+            long_opt = arg
+        norm_long_opt = normalize_opt(long_opt, self.ctx)
+
+        # At this point we will match the (assumed) long option through
+        # the long option matching code.  Note that this allows options
+        # like "-foo" to be matched as long options.
+        try:
+            self._match_long_opt(norm_long_opt, explicit_value, state)
+        except NoSuchOption:
+            # At this point the long option matching failed, and we need
+            # to try with short options.  However there is a special rule
+            # which says, that if we have a two character options prefix
+            # (applies to "--foo" for instance), we do not dispatch to the
+            # short option code and will instead raise the no option
+            # error.
+            if arg[:2] not in self._opt_prefixes:
+                return self._match_short_opt(arg, state)
+            if not self.ignore_unknown_options:
+                raise
+            state.largs.append(arg)
--- a/matteo_env/Lib/site-packages/click/termui.py
+++ b/matteo_env/Lib/site-packages/click/termui.py
@ -0,0 +1,681 @@
+import inspect
+import io
+import itertools
+import os
+import struct
+import sys
+
+from ._compat import DEFAULT_COLUMNS
+from ._compat import get_winterm_size
+from ._compat import isatty
+from ._compat import raw_input
+from ._compat import string_types
+from ._compat import strip_ansi
+from ._compat import text_type
+from ._compat import WIN
+from .exceptions import Abort
+from .exceptions import UsageError
+from .globals import resolve_color_default
+from .types import Choice
+from .types import convert_type
+from .types import Path
+from .utils import echo
+from .utils import LazyFile
+
+# The prompt functions to use.  The doc tools currently override these
+# functions to customize how they work.
+visible_prompt_func = raw_input
+
+_ansi_colors = {
+    "black": 30,
+    "red": 31,
+    "green": 32,
+    "yellow": 33,
+    "blue": 34,
+    "magenta": 35,
+    "cyan": 36,
+    "white": 37,
+    "reset": 39,
+    "bright_black": 90,
+    "bright_red": 91,
+    "bright_green": 92,
+    "bright_yellow": 93,
+    "bright_blue": 94,
+    "bright_magenta": 95,
+    "bright_cyan": 96,
+    "bright_white": 97,
+}
+_ansi_reset_all = "\033[0m"
+
+
+def hidden_prompt_func(prompt):
+    import getpass
+
+    return getpass.getpass(prompt)
+
+
+def _build_prompt(
+    text, suffix, show_default=False, default=None, show_choices=True, type=None
+):
+    prompt = text
+    if type is not None and show_choices and isinstance(type, Choice):
+        prompt += " ({})".format(", ".join(map(str, type.choices)))
+    if default is not None and show_default:
+        prompt = "{} [{}]".format(prompt, _format_default(default))
+    return prompt + suffix
+
+
+def _format_default(default):
+    if isinstance(default, (io.IOBase, LazyFile)) and hasattr(default, "name"):
+        return default.name
+
+    return default
+
+
+def prompt(
+    text,
+    default=None,
+    hide_input=False,
+    confirmation_prompt=False,
+    type=None,
+    value_proc=None,
+    prompt_suffix=": ",
+    show_default=True,
+    err=False,
+    show_choices=True,
+):
+    """Prompts a user for input.  This is a convenience function that can
+    be used to prompt a user for input later.
+
+    If the user aborts the input by sending a interrupt signal, this
+    function will catch it and raise a :exc:`Abort` exception.
+
+    .. versionadded:: 7.0
+       Added the show_choices parameter.
+
+    .. versionadded:: 6.0
+       Added unicode support for cmd.exe on Windows.
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param text: the text to show for the prompt.
+    :param default: the default value to use if no input happens.  If this
+                    is not given it will prompt until it's aborted.
+    :param hide_input: if this is set to true then the input value will
+                       be hidden.
+    :param confirmation_prompt: asks for confirmation for the value.
+    :param type: the type to use to check the value against.
+    :param value_proc: if this parameter is provided it's a function that
+                       is invoked instead of the type conversion to
+                       convert a value.
+    :param prompt_suffix: a suffix that should be added to the prompt.
+    :param show_default: shows or hides the default value in the prompt.
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    :param show_choices: Show or hide choices if the passed type is a Choice.
+                         For example if type is a Choice of either day or week,
+                         show_choices is true and text is "Group by" then the
+                         prompt will be "Group by (day, week): ".
+    """
+    result = None
+
+    def prompt_func(text):
+        f = hidden_prompt_func if hide_input else visible_prompt_func
+        try:
+            # Write the prompt separately so that we get nice
+            # coloring through colorama on Windows
+            echo(text, nl=False, err=err)
+            return f("")
+        except (KeyboardInterrupt, EOFError):
+            # getpass doesn't print a newline if the user aborts input with ^C.
+            # Allegedly this behavior is inherited from getpass(3).
+            # A doc bug has been filed at https://bugs.python.org/issue24711
+            if hide_input:
+                echo(None, err=err)
+            raise Abort()
+
+    if value_proc is None:
+        value_proc = convert_type(type, default)
+
+    prompt = _build_prompt(
+        text, prompt_suffix, show_default, default, show_choices, type
+    )
+
+    while 1:
+        while 1:
+            value = prompt_func(prompt)
+            if value:
+                break
+            elif default is not None:
+                if isinstance(value_proc, Path):
+                    # validate Path default value(exists, dir_okay etc.)
+                    value = default
+                    break
+                return default
+        try:
+            result = value_proc(value)
+        except UsageError as e:
+            echo("Error: {}".format(e.message), err=err)  # noqa: B306
+            continue
+        if not confirmation_prompt:
+            return result
+        while 1:
+            value2 = prompt_func("Repeat for confirmation: ")
+            if value2:
+                break
+        if value == value2:
+            return result
+        echo("Error: the two entered values do not match", err=err)
+
+
+def confirm(
+    text, default=False, abort=False, prompt_suffix=": ", show_default=True, err=False
+):
+    """Prompts for confirmation (yes/no question).
+
+    If the user aborts the input by sending a interrupt signal this
+    function will catch it and raise a :exc:`Abort` exception.
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param text: the question to ask.
+    :param default: the default for the prompt.
+    :param abort: if this is set to `True` a negative answer aborts the
+                  exception by raising :exc:`Abort`.
+    :param prompt_suffix: a suffix that should be added to the prompt.
+    :param show_default: shows or hides the default value in the prompt.
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    """
+    prompt = _build_prompt(
+        text, prompt_suffix, show_default, "Y/n" if default else "y/N"
+    )
+    while 1:
+        try:
+            # Write the prompt separately so that we get nice
+            # coloring through colorama on Windows
+            echo(prompt, nl=False, err=err)
+            value = visible_prompt_func("").lower().strip()
+        except (KeyboardInterrupt, EOFError):
+            raise Abort()
+        if value in ("y", "yes"):
+            rv = True
+        elif value in ("n", "no"):
+            rv = False
+        elif value == "":
+            rv = default
+        else:
+            echo("Error: invalid input", err=err)
+            continue
+        break
+    if abort and not rv:
+        raise Abort()
+    return rv
+
+
+def get_terminal_size():
+    """Returns the current size of the terminal as tuple in the form
+    ``(width, height)`` in columns and rows.
+    """
+    # If shutil has get_terminal_size() (Python 3.3 and later) use that
+    if sys.version_info >= (3, 3):
+        import shutil
+
+        shutil_get_terminal_size = getattr(shutil, "get_terminal_size", None)
+        if shutil_get_terminal_size:
+            sz = shutil_get_terminal_size()
+            return sz.columns, sz.lines
+
+    # We provide a sensible default for get_winterm_size() when being invoked
+    # inside a subprocess. Without this, it would not provide a useful input.
+    if get_winterm_size is not None:
+        size = get_winterm_size()
+        if size == (0, 0):
+            return (79, 24)
+        else:
+            return size
+
+    def ioctl_gwinsz(fd):
+        try:
+            import fcntl
+            import termios
+
+            cr = struct.unpack("hh", fcntl.ioctl(fd, termios.TIOCGWINSZ, "1234"))
+        except Exception:
+            return
+        return cr
+
+    cr = ioctl_gwinsz(0) or ioctl_gwinsz(1) or ioctl_gwinsz(2)
+    if not cr:
+        try:
+            fd = os.open(os.ctermid(), os.O_RDONLY)
+            try:
+                cr = ioctl_gwinsz(fd)
+            finally:
+                os.close(fd)
+        except Exception:
+            pass
+    if not cr or not cr[0] or not cr[1]:
+        cr = (os.environ.get("LINES", 25), os.environ.get("COLUMNS", DEFAULT_COLUMNS))
+    return int(cr[1]), int(cr[0])
+
+
+def echo_via_pager(text_or_generator, color=None):
+    """This function takes a text and shows it via an environment specific
+    pager on stdout.
+
+    .. versionchanged:: 3.0
+       Added the `color` flag.
+
+    :param text_or_generator: the text to page, or alternatively, a
+                              generator emitting the text to page.
+    :param color: controls if the pager supports ANSI colors or not.  The
+                  default is autodetection.
+    """
+    color = resolve_color_default(color)
+
+    if inspect.isgeneratorfunction(text_or_generator):
+        i = text_or_generator()
+    elif isinstance(text_or_generator, string_types):
+        i = [text_or_generator]
+    else:
+        i = iter(text_or_generator)
+
+    # convert every element of i to a text type if necessary
+    text_generator = (el if isinstance(el, string_types) else text_type(el) for el in i)
+
+    from ._termui_impl import pager
+
+    return pager(itertools.chain(text_generator, "\n"), color)
+
+
+def progressbar(
+    iterable=None,
+    length=None,
+    label=None,
+    show_eta=True,
+    show_percent=None,
+    show_pos=False,
+    item_show_func=None,
+    fill_char="#",
+    empty_char="-",
+    bar_template="%(label)s  [%(bar)s]  %(info)s",
+    info_sep="  ",
+    width=36,
+    file=None,
+    color=None,
+):
+    """This function creates an iterable context manager that can be used
+    to iterate over something while showing a progress bar.  It will
+    either iterate over the `iterable` or `length` items (that are counted
+    up).  While iteration happens, this function will print a rendered
+    progress bar to the given `file` (defaults to stdout) and will attempt
+    to calculate remaining time and more.  By default, this progress bar
+    will not be rendered if the file is not a terminal.
+
+    The context manager creates the progress bar.  When the context
+    manager is entered the progress bar is already created.  With every
+    iteration over the progress bar, the iterable passed to the bar is
+    advanced and the bar is updated.  When the context manager exits,
+    a newline is printed and the progress bar is finalized on screen.
+
+    Note: The progress bar is currently designed for use cases where the
+    total progress can be expected to take at least several seconds.
+    Because of this, the ProgressBar class object won't display
+    progress that is considered too fast, and progress where the time
+    between steps is less than a second.
+
+    No printing must happen or the progress bar will be unintentionally
+    destroyed.
+
+    Example usage::
+
+        with progressbar(items) as bar:
+            for item in bar:
+                do_something_with(item)
+
+    Alternatively, if no iterable is specified, one can manually update the
+    progress bar through the `update()` method instead of directly
+    iterating over the progress bar.  The update method accepts the number
+    of steps to increment the bar with::
+
+        with progressbar(length=chunks.total_bytes) as bar:
+            for chunk in chunks:
+                process_chunk(chunk)
+                bar.update(chunks.bytes)
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 4.0
+       Added the `color` parameter.  Added a `update` method to the
+       progressbar object.
+
+    :param iterable: an iterable to iterate over.  If not provided the length
+                     is required.
+    :param length: the number of items to iterate over.  By default the
+                   progressbar will attempt to ask the iterator about its
+                   length, which might or might not work.  If an iterable is
+                   also provided this parameter can be used to override the
+                   length.  If an iterable is not provided the progress bar
+                   will iterate over a range of that length.
+    :param label: the label to show next to the progress bar.
+    :param show_eta: enables or disables the estimated time display.  This is
+                     automatically disabled if the length cannot be
+                     determined.
+    :param show_percent: enables or disables the percentage display.  The
+                         default is `True` if the iterable has a length or
+                         `False` if not.
+    :param show_pos: enables or disables the absolute position display.  The
+                     default is `False`.
+    :param item_show_func: a function called with the current item which
+                           can return a string to show the current item
+                           next to the progress bar.  Note that the current
+                           item can be `None`!
+    :param fill_char: the character to use to show the filled part of the
+                      progress bar.
+    :param empty_char: the character to use to show the non-filled part of
+                       the progress bar.
+    :param bar_template: the format string to use as template for the bar.
+                         The parameters in it are ``label`` for the label,
+                         ``bar`` for the progress bar and ``info`` for the
+                         info section.
+    :param info_sep: the separator between multiple info items (eta etc.)
+    :param width: the width of the progress bar in characters, 0 means full
+                  terminal width
+    :param file: the file to write to.  If this is not a terminal then
+                 only the label is printed.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.  This is only needed if ANSI
+                  codes are included anywhere in the progress bar output
+                  which is not the case by default.
+    """
+    from ._termui_impl import ProgressBar
+
+    color = resolve_color_default(color)
+    return ProgressBar(
+        iterable=iterable,
+        length=length,
+        show_eta=show_eta,
+        show_percent=show_percent,
+        show_pos=show_pos,
+        item_show_func=item_show_func,
+        fill_char=fill_char,
+        empty_char=empty_char,
+        bar_template=bar_template,
+        info_sep=info_sep,
+        file=file,
+        label=label,
+        width=width,
+        color=color,
+    )
+
+
+def clear():
+    """Clears the terminal screen.  This will have the effect of clearing
+    the whole visible space of the terminal and moving the cursor to the
+    top left.  This does not do anything if not connected to a terminal.
+
+    .. versionadded:: 2.0
+    """
+    if not isatty(sys.stdout):
+        return
+    # If we're on Windows and we don't have colorama available, then we
+    # clear the screen by shelling out.  Otherwise we can use an escape
+    # sequence.
+    if WIN:
+        os.system("cls")
+    else:
+        sys.stdout.write("\033[2J\033[1;1H")
+
+
+def style(
+    text,
+    fg=None,
+    bg=None,
+    bold=None,
+    dim=None,
+    underline=None,
+    blink=None,
+    reverse=None,
+    reset=True,
+):
+    """Styles a text with ANSI styles and returns the new string.  By
+    default the styling is self contained which means that at the end
+    of the string a reset code is issued.  This can be prevented by
+    passing ``reset=False``.
+
+    Examples::
+
+        click.echo(click.style('Hello World!', fg='green'))
+        click.echo(click.style('ATTENTION!', blink=True))
+        click.echo(click.style('Some things', reverse=True, fg='cyan'))
+
+    Supported color names:
+
+    * ``black`` (might be a gray)
+    * ``red``
+    * ``green``
+    * ``yellow`` (might be an orange)
+    * ``blue``
+    * ``magenta``
+    * ``cyan``
+    * ``white`` (might be light gray)
+    * ``bright_black``
+    * ``bright_red``
+    * ``bright_green``
+    * ``bright_yellow``
+    * ``bright_blue``
+    * ``bright_magenta``
+    * ``bright_cyan``
+    * ``bright_white``
+    * ``reset`` (reset the color code only)
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 7.0
+       Added support for bright colors.
+
+    :param text: the string to style with ansi codes.
+    :param fg: if provided this will become the foreground color.
+    :param bg: if provided this will become the background color.
+    :param bold: if provided this will enable or disable bold mode.
+    :param dim: if provided this will enable or disable dim mode.  This is
+                badly supported.
+    :param underline: if provided this will enable or disable underline.
+    :param blink: if provided this will enable or disable blinking.
+    :param reverse: if provided this will enable or disable inverse
+                    rendering (foreground becomes background and the
+                    other way round).
+    :param reset: by default a reset-all code is added at the end of the
+                  string which means that styles do not carry over.  This
+                  can be disabled to compose styles.
+    """
+    bits = []
+    if fg:
+        try:
+            bits.append("\033[{}m".format(_ansi_colors[fg]))
+        except KeyError:
+            raise TypeError("Unknown color '{}'".format(fg))
+    if bg:
+        try:
+            bits.append("\033[{}m".format(_ansi_colors[bg] + 10))
+        except KeyError:
+            raise TypeError("Unknown color '{}'".format(bg))
+    if bold is not None:
+        bits.append("\033[{}m".format(1 if bold else 22))
+    if dim is not None:
+        bits.append("\033[{}m".format(2 if dim else 22))
+    if underline is not None:
+        bits.append("\033[{}m".format(4 if underline else 24))
+    if blink is not None:
+        bits.append("\033[{}m".format(5 if blink else 25))
+    if reverse is not None:
+        bits.append("\033[{}m".format(7 if reverse else 27))
+    bits.append(text)
+    if reset:
+        bits.append(_ansi_reset_all)
+    return "".join(bits)
+
+
+def unstyle(text):
+    """Removes ANSI styling information from a string.  Usually it's not
+    necessary to use this function as Click's echo function will
+    automatically remove styling if necessary.
+
+    .. versionadded:: 2.0
+
+    :param text: the text to remove style information from.
+    """
+    return strip_ansi(text)
+
+
+def secho(message=None, file=None, nl=True, err=False, color=None, **styles):
+    """This function combines :func:`echo` and :func:`style` into one
+    call.  As such the following two calls are the same::
+
+        click.secho('Hello World!', fg='green')
+        click.echo(click.style('Hello World!', fg='green'))
+
+    All keyword arguments are forwarded to the underlying functions
+    depending on which one they go with.
+
+    .. versionadded:: 2.0
+    """
+    if message is not None:
+        message = style(message, **styles)
+    return echo(message, file=file, nl=nl, err=err, color=color)
+
+
+def edit(
+    text=None, editor=None, env=None, require_save=True, extension=".txt", filename=None
+):
+    r"""Edits the given text in the defined editor.  If an editor is given
+    (should be the full path to the executable but the regular operating
+    system search path is used for finding the executable) it overrides
+    the detected editor.  Optionally, some environment variables can be
+    used.  If the editor is closed without changes, `None` is returned.  In
+    case a file is edited directly the return value is always `None` and
+    `require_save` and `extension` are ignored.
+
+    If the editor cannot be opened a :exc:`UsageError` is raised.
+
+    Note for Windows: to simplify cross-platform usage, the newlines are
+    automatically converted from POSIX to Windows and vice versa.  As such,
+    the message here will have ``\n`` as newline markers.
+
+    :param text: the text to edit.
+    :param editor: optionally the editor to use.  Defaults to automatic
+                   detection.
+    :param env: environment variables to forward to the editor.
+    :param require_save: if this is true, then not saving in the editor
+                         will make the return value become `None`.
+    :param extension: the extension to tell the editor about.  This defaults
+                      to `.txt` but changing this might change syntax
+                      highlighting.
+    :param filename: if provided it will edit this file instead of the
+                     provided text contents.  It will not use a temporary
+                     file as an indirection in that case.
+    """
+    from ._termui_impl import Editor
+
+    editor = Editor(
+        editor=editor, env=env, require_save=require_save, extension=extension
+    )
+    if filename is None:
+        return editor.edit(text)
+    editor.edit_file(filename)
+
+
+def launch(url, wait=False, locate=False):
+    """This function launches the given URL (or filename) in the default
+    viewer application for this file type.  If this is an executable, it
+    might launch the executable in a new session.  The return value is
+    the exit code of the launched application.  Usually, ``0`` indicates
+    success.
+
+    Examples::
+
+        click.launch('https://click.palletsprojects.com/')
+        click.launch('/my/downloaded/file', locate=True)
+
+    .. versionadded:: 2.0
+
+    :param url: URL or filename of the thing to launch.
+    :param wait: waits for the program to stop.
+    :param locate: if this is set to `True` then instead of launching the
+                   application associated with the URL it will attempt to
+                   launch a file manager with the file located.  This
+                   might have weird effects if the URL does not point to
+                   the filesystem.
+    """
+    from ._termui_impl import open_url
+
+    return open_url(url, wait=wait, locate=locate)
+
+
+# If this is provided, getchar() calls into this instead.  This is used
+# for unittesting purposes.
+_getchar = None
+
+
+def getchar(echo=False):
+    """Fetches a single character from the terminal and returns it.  This
+    will always return a unicode character and under certain rare
+    circumstances this might return more than one character.  The
+    situations which more than one character is returned is when for
+    whatever reason multiple characters end up in the terminal buffer or
+    standard input was not actually a terminal.
+
+    Note that this will always read from the terminal, even if something
+    is piped into the standard input.
+
+    Note for Windows: in rare cases when typing non-ASCII characters, this
+    function might wait for a second character and then return both at once.
+    This is because certain Unicode characters look like special-key markers.
+
+    .. versionadded:: 2.0
+
+    :param echo: if set to `True`, the character read will also show up on
+                 the terminal.  The default is to not show it.
+    """
+    f = _getchar
+    if f is None:
+        from ._termui_impl import getchar as f
+    return f(echo)
+
+
+def raw_terminal():
+    from ._termui_impl import raw_terminal as f
+
+    return f()
+
+
+def pause(info="Press any key to continue ...", err=False):
+    """This command stops execution and waits for the user to press any
+    key to continue.  This is similar to the Windows batch "pause"
+    command.  If the program is not run through a terminal, this command
+    will instead do nothing.
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param info: the info string to print before pausing.
+    :param err: if set to message goes to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    """
+    if not isatty(sys.stdin) or not isatty(sys.stdout):
+        return
+    try:
+        if info:
+            echo(info, nl=False, err=err)
+        try:
+            getchar()
+        except (KeyboardInterrupt, EOFError):
+            pass
+    finally:
+        if info:
+            echo(err=err)
--- a/matteo_env/Lib/site-packages/click/testing.py
+++ b/matteo_env/Lib/site-packages/click/testing.py
@ -0,0 +1,382 @@
+import contextlib
+import os
+import shlex
+import shutil
+import sys
+import tempfile
+
+from . import formatting
+from . import termui
+from . import utils
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import string_types
+
+
+if PY2:
+    from cStringIO import StringIO
+else:
+    import io
+    from ._compat import _find_binary_reader
+
+
+class EchoingStdin(object):
+    def __init__(self, input, output):
+        self._input = input
+        self._output = output
+
+    def __getattr__(self, x):
+        return getattr(self._input, x)
+
+    def _echo(self, rv):
+        self._output.write(rv)
+        return rv
+
+    def read(self, n=-1):
+        return self._echo(self._input.read(n))
+
+    def readline(self, n=-1):
+        return self._echo(self._input.readline(n))
+
+    def readlines(self):
+        return [self._echo(x) for x in self._input.readlines()]
+
+    def __iter__(self):
+        return iter(self._echo(x) for x in self._input)
+
+    def __repr__(self):
+        return repr(self._input)
+
+
+def make_input_stream(input, charset):
+    # Is already an input stream.
+    if hasattr(input, "read"):
+        if PY2:
+            return input
+        rv = _find_binary_reader(input)
+        if rv is not None:
+            return rv
+        raise TypeError("Could not find binary reader for input stream.")
+
+    if input is None:
+        input = b""
+    elif not isinstance(input, bytes):
+        input = input.encode(charset)
+    if PY2:
+        return StringIO(input)
+    return io.BytesIO(input)
+
+
+class Result(object):
+    """Holds the captured result of an invoked CLI script."""
+
+    def __init__(
+        self, runner, stdout_bytes, stderr_bytes, exit_code, exception, exc_info=None
+    ):
+        #: The runner that created the result
+        self.runner = runner
+        #: The standard output as bytes.
+        self.stdout_bytes = stdout_bytes
+        #: The standard error as bytes, or None if not available
+        self.stderr_bytes = stderr_bytes
+        #: The exit code as integer.
+        self.exit_code = exit_code
+        #: The exception that happened if one did.
+        self.exception = exception
+        #: The traceback
+        self.exc_info = exc_info
+
+    @property
+    def output(self):
+        """The (standard) output as unicode string."""
+        return self.stdout
+
+    @property
+    def stdout(self):
+        """The standard output as unicode string."""
+        return self.stdout_bytes.decode(self.runner.charset, "replace").replace(
+            "\r\n", "\n"
+        )
+
+    @property
+    def stderr(self):
+        """The standard error as unicode string."""
+        if self.stderr_bytes is None:
+            raise ValueError("stderr not separately captured")
+        return self.stderr_bytes.decode(self.runner.charset, "replace").replace(
+            "\r\n", "\n"
+        )
+
+    def __repr__(self):
+        return "<{} {}>".format(
+            type(self).__name__, repr(self.exception) if self.exception else "okay"
+        )
+
+
+class CliRunner(object):
+    """The CLI runner provides functionality to invoke a Click command line
+    script for unittesting purposes in a isolated environment.  This only
+    works in single-threaded systems without any concurrency as it changes the
+    global interpreter state.
+
+    :param charset: the character set for the input and output data.  This is
+                    UTF-8 by default and should not be changed currently as
+                    the reporting to Click only works in Python 2 properly.
+    :param env: a dictionary with environment variables for overriding.
+    :param echo_stdin: if this is set to `True`, then reading from stdin writes
+                       to stdout.  This is useful for showing examples in
+                       some circumstances.  Note that regular prompts
+                       will automatically echo the input.
+    :param mix_stderr: if this is set to `False`, then stdout and stderr are
+                       preserved as independent streams.  This is useful for
+                       Unix-philosophy apps that have predictable stdout and
+                       noisy stderr, such that each may be measured
+                       independently
+    """
+
+    def __init__(self, charset=None, env=None, echo_stdin=False, mix_stderr=True):
+        if charset is None:
+            charset = "utf-8"
+        self.charset = charset
+        self.env = env or {}
+        self.echo_stdin = echo_stdin
+        self.mix_stderr = mix_stderr
+
+    def get_default_prog_name(self, cli):
+        """Given a command object it will return the default program name
+        for it.  The default is the `name` attribute or ``"root"`` if not
+        set.
+        """
+        return cli.name or "root"
+
+    def make_env(self, overrides=None):
+        """Returns the environment overrides for invoking a script."""
+        rv = dict(self.env)
+        if overrides:
+            rv.update(overrides)
+        return rv
+
+    @contextlib.contextmanager
+    def isolation(self, input=None, env=None, color=False):
+        """A context manager that sets up the isolation for invoking of a
+        command line tool.  This sets up stdin with the given input data
+        and `os.environ` with the overrides from the given dictionary.
+        This also rebinds some internals in Click to be mocked (like the
+        prompt functionality).
+
+        This is automatically done in the :meth:`invoke` method.
+
+        .. versionadded:: 4.0
+           The ``color`` parameter was added.
+
+        :param input: the input stream to put into sys.stdin.
+        :param env: the environment overrides as dictionary.
+        :param color: whether the output should contain color codes. The
+                      application can still override this explicitly.
+        """
+        input = make_input_stream(input, self.charset)
+
+        old_stdin = sys.stdin
+        old_stdout = sys.stdout
+        old_stderr = sys.stderr
+        old_forced_width = formatting.FORCED_WIDTH
+        formatting.FORCED_WIDTH = 80
+
+        env = self.make_env(env)
+
+        if PY2:
+            bytes_output = StringIO()
+            if self.echo_stdin:
+                input = EchoingStdin(input, bytes_output)
+            sys.stdout = bytes_output
+            if not self.mix_stderr:
+                bytes_error = StringIO()
+                sys.stderr = bytes_error
+        else:
+            bytes_output = io.BytesIO()
+            if self.echo_stdin:
+                input = EchoingStdin(input, bytes_output)
+            input = io.TextIOWrapper(input, encoding=self.charset)
+            sys.stdout = io.TextIOWrapper(bytes_output, encoding=self.charset)
+            if not self.mix_stderr:
+                bytes_error = io.BytesIO()
+                sys.stderr = io.TextIOWrapper(bytes_error, encoding=self.charset)
+
+        if self.mix_stderr:
+            sys.stderr = sys.stdout
+
+        sys.stdin = input
+
+        def visible_input(prompt=None):
+            sys.stdout.write(prompt or "")
+            val = input.readline().rstrip("\r\n")
+            sys.stdout.write("{}\n".format(val))
+            sys.stdout.flush()
+            return val
+
+        def hidden_input(prompt=None):
+            sys.stdout.write("{}\n".format(prompt or ""))
+            sys.stdout.flush()
+            return input.readline().rstrip("\r\n")
+
+        def _getchar(echo):
+            char = sys.stdin.read(1)
+            if echo:
+                sys.stdout.write(char)
+                sys.stdout.flush()
+            return char
+
+        default_color = color
+
+        def should_strip_ansi(stream=None, color=None):
+            if color is None:
+                return not default_color
+            return not color
+
+        old_visible_prompt_func = termui.visible_prompt_func
+        old_hidden_prompt_func = termui.hidden_prompt_func
+        old__getchar_func = termui._getchar
+        old_should_strip_ansi = utils.should_strip_ansi
+        termui.visible_prompt_func = visible_input
+        termui.hidden_prompt_func = hidden_input
+        termui._getchar = _getchar
+        utils.should_strip_ansi = should_strip_ansi
+
+        old_env = {}
+        try:
+            for key, value in iteritems(env):
+                old_env[key] = os.environ.get(key)
+                if value is None:
+                    try:
+                        del os.environ[key]
+                    except Exception:
+                        pass
+                else:
+                    os.environ[key] = value
+            yield (bytes_output, not self.mix_stderr and bytes_error)
+        finally:
+            for key, value in iteritems(old_env):
+                if value is None:
+                    try:
+                        del os.environ[key]
+                    except Exception:
+                        pass
+                else:
+                    os.environ[key] = value
+            sys.stdout = old_stdout
+            sys.stderr = old_stderr
+            sys.stdin = old_stdin
+            termui.visible_prompt_func = old_visible_prompt_func
+            termui.hidden_prompt_func = old_hidden_prompt_func
+            termui._getchar = old__getchar_func
+            utils.should_strip_ansi = old_should_strip_ansi
+            formatting.FORCED_WIDTH = old_forced_width
+
+    def invoke(
+        self,
+        cli,
+        args=None,
+        input=None,
+        env=None,
+        catch_exceptions=True,
+        color=False,
+        **extra
+    ):
+        """Invokes a command in an isolated environment.  The arguments are
+        forwarded directly to the command line script, the `extra` keyword
+        arguments are passed to the :meth:`~clickpkg.Command.main` function of
+        the command.
+
+        This returns a :class:`Result` object.
+
+        .. versionadded:: 3.0
+           The ``catch_exceptions`` parameter was added.
+
+        .. versionchanged:: 3.0
+           The result object now has an `exc_info` attribute with the
+           traceback if available.
+
+        .. versionadded:: 4.0
+           The ``color`` parameter was added.
+
+        :param cli: the command to invoke
+        :param args: the arguments to invoke. It may be given as an iterable
+                     or a string. When given as string it will be interpreted
+                     as a Unix shell command. More details at
+                     :func:`shlex.split`.
+        :param input: the input data for `sys.stdin`.
+        :param env: the environment overrides.
+        :param catch_exceptions: Whether to catch any other exceptions than
+                                 ``SystemExit``.
+        :param extra: the keyword arguments to pass to :meth:`main`.
+        :param color: whether the output should contain color codes. The
+                      application can still override this explicitly.
+        """
+        exc_info = None
+        with self.isolation(input=input, env=env, color=color) as outstreams:
+            exception = None
+            exit_code = 0
+
+            if isinstance(args, string_types):
+                args = shlex.split(args)
+
+            try:
+                prog_name = extra.pop("prog_name")
+            except KeyError:
+                prog_name = self.get_default_prog_name(cli)
+
+            try:
+                cli.main(args=args or (), prog_name=prog_name, **extra)
+            except SystemExit as e:
+                exc_info = sys.exc_info()
+                exit_code = e.code
+                if exit_code is None:
+                    exit_code = 0
+
+                if exit_code != 0:
+                    exception = e
+
+                if not isinstance(exit_code, int):
+                    sys.stdout.write(str(exit_code))
+                    sys.stdout.write("\n")
+                    exit_code = 1
+
+            except Exception as e:
+                if not catch_exceptions:
+                    raise
+                exception = e
+                exit_code = 1
+                exc_info = sys.exc_info()
+            finally:
+                sys.stdout.flush()
+                stdout = outstreams[0].getvalue()
+                if self.mix_stderr:
+                    stderr = None
+                else:
+                    stderr = outstreams[1].getvalue()
+
+        return Result(
+            runner=self,
+            stdout_bytes=stdout,
+            stderr_bytes=stderr,
+            exit_code=exit_code,
+            exception=exception,
+            exc_info=exc_info,
+        )
+
+    @contextlib.contextmanager
+    def isolated_filesystem(self):
+        """A context manager that creates a temporary folder and changes
+        the current working directory to it for isolated filesystem tests.
+        """
+        cwd = os.getcwd()
+        t = tempfile.mkdtemp()
+        os.chdir(t)
+        try:
+            yield t
+        finally:
+            os.chdir(cwd)
+            try:
+                shutil.rmtree(t)
+            except (OSError, IOError):  # noqa: B014
+                pass
--- a/matteo_env/Lib/site-packages/click/types.py
+++ b/matteo_env/Lib/site-packages/click/types.py
@ -0,0 +1,762 @@
+import os
+import stat
+from datetime import datetime
+
+from ._compat import _get_argv_encoding
+from ._compat import filename_to_ui
+from ._compat import get_filesystem_encoding
+from ._compat import get_streerror
+from ._compat import open_stream
+from ._compat import PY2
+from ._compat import text_type
+from .exceptions import BadParameter
+from .utils import LazyFile
+from .utils import safecall
+
+
+class ParamType(object):
+    """Helper for converting values through types.  The following is
+    necessary for a valid type:
+
+    *   it needs a name
+    *   it needs to pass through None unchanged
+    *   it needs to convert from a string
+    *   it needs to convert its result type through unchanged
+        (eg: needs to be idempotent)
+    *   it needs to be able to deal with param and context being `None`.
+        This can be the case when the object is used with prompt
+        inputs.
+    """
+
+    is_composite = False
+
+    #: the descriptive name of this type
+    name = None
+
+    #: if a list of this type is expected and the value is pulled from a
+    #: string environment variable, this is what splits it up.  `None`
+    #: means any whitespace.  For all parameters the general rule is that
+    #: whitespace splits them up.  The exception are paths and files which
+    #: are split by ``os.path.pathsep`` by default (":" on Unix and ";" on
+    #: Windows).
+    envvar_list_splitter = None
+
+    def __call__(self, value, param=None, ctx=None):
+        if value is not None:
+            return self.convert(value, param, ctx)
+
+    def get_metavar(self, param):
+        """Returns the metavar default for this param if it provides one."""
+
+    def get_missing_message(self, param):
+        """Optionally might return extra information about a missing
+        parameter.
+
+        .. versionadded:: 2.0
+        """
+
+    def convert(self, value, param, ctx):
+        """Converts the value.  This is not invoked for values that are
+        `None` (the missing value).
+        """
+        return value
+
+    def split_envvar_value(self, rv):
+        """Given a value from an environment variable this splits it up
+        into small chunks depending on the defined envvar list splitter.
+
+        If the splitter is set to `None`, which means that whitespace splits,
+        then leading and trailing whitespace is ignored.  Otherwise, leading
+        and trailing splitters usually lead to empty items being included.
+        """
+        return (rv or "").split(self.envvar_list_splitter)
+
+    def fail(self, message, param=None, ctx=None):
+        """Helper method to fail with an invalid value message."""
+        raise BadParameter(message, ctx=ctx, param=param)
+
+
+class CompositeParamType(ParamType):
+    is_composite = True
+
+    @property
+    def arity(self):
+        raise NotImplementedError()
+
+
+class FuncParamType(ParamType):
+    def __init__(self, func):
+        self.name = func.__name__
+        self.func = func
+
+    def convert(self, value, param, ctx):
+        try:
+            return self.func(value)
+        except ValueError:
+            try:
+                value = text_type(value)
+            except UnicodeError:
+                value = str(value).decode("utf-8", "replace")
+            self.fail(value, param, ctx)
+
+
+class UnprocessedParamType(ParamType):
+    name = "text"
+
+    def convert(self, value, param, ctx):
+        return value
+
+    def __repr__(self):
+        return "UNPROCESSED"
+
+
+class StringParamType(ParamType):
+    name = "text"
+
+    def convert(self, value, param, ctx):
+        if isinstance(value, bytes):
+            enc = _get_argv_encoding()
+            try:
+                value = value.decode(enc)
+            except UnicodeError:
+                fs_enc = get_filesystem_encoding()
+                if fs_enc != enc:
+                    try:
+                        value = value.decode(fs_enc)
+                    except UnicodeError:
+                        value = value.decode("utf-8", "replace")
+                else:
+                    value = value.decode("utf-8", "replace")
+            return value
+        return value
+
+    def __repr__(self):
+        return "STRING"
+
+
+class Choice(ParamType):
+    """The choice type allows a value to be checked against a fixed set
+    of supported values. All of these values have to be strings.
+
+    You should only pass a list or tuple of choices. Other iterables
+    (like generators) may lead to surprising results.
+
+    The resulting value will always be one of the originally passed choices
+    regardless of ``case_sensitive`` or any ``ctx.token_normalize_func``
+    being specified.
+
+    See :ref:`choice-opts` for an example.
+
+    :param case_sensitive: Set to false to make choices case
+        insensitive. Defaults to true.
+    """
+
+    name = "choice"
+
+    def __init__(self, choices, case_sensitive=True):
+        self.choices = choices
+        self.case_sensitive = case_sensitive
+
+    def get_metavar(self, param):
+        return "[{}]".format("|".join(self.choices))
+
+    def get_missing_message(self, param):
+        return "Choose from:\n\t{}.".format(",\n\t".join(self.choices))
+
+    def convert(self, value, param, ctx):
+        # Match through normalization and case sensitivity
+        # first do token_normalize_func, then lowercase
+        # preserve original `value` to produce an accurate message in
+        # `self.fail`
+        normed_value = value
+        normed_choices = {choice: choice for choice in self.choices}
+
+        if ctx is not None and ctx.token_normalize_func is not None:
+            normed_value = ctx.token_normalize_func(value)
+            normed_choices = {
+                ctx.token_normalize_func(normed_choice): original
+                for normed_choice, original in normed_choices.items()
+            }
+
+        if not self.case_sensitive:
+            if PY2:
+                lower = str.lower
+            else:
+                lower = str.casefold
+
+            normed_value = lower(normed_value)
+            normed_choices = {
+                lower(normed_choice): original
+                for normed_choice, original in normed_choices.items()
+            }
+
+        if normed_value in normed_choices:
+            return normed_choices[normed_value]
+
+        self.fail(
+            "invalid choice: {}. (choose from {})".format(
+                value, ", ".join(self.choices)
+            ),
+            param,
+            ctx,
+        )
+
+    def __repr__(self):
+        return "Choice('{}')".format(list(self.choices))
+
+
+class DateTime(ParamType):
+    """The DateTime type converts date strings into `datetime` objects.
+
+    The format strings which are checked are configurable, but default to some
+    common (non-timezone aware) ISO 8601 formats.
+
+    When specifying *DateTime* formats, you should only pass a list or a tuple.
+    Other iterables, like generators, may lead to surprising results.
+
+    The format strings are processed using ``datetime.strptime``, and this
+    consequently defines the format strings which are allowed.
+
+    Parsing is tried using each format, in order, and the first format which
+    parses successfully is used.
+
+    :param formats: A list or tuple of date format strings, in the order in
+                    which they should be tried. Defaults to
+                    ``'%Y-%m-%d'``, ``'%Y-%m-%dT%H:%M:%S'``,
+                    ``'%Y-%m-%d %H:%M:%S'``.
+    """
+
+    name = "datetime"
+
+    def __init__(self, formats=None):
+        self.formats = formats or ["%Y-%m-%d", "%Y-%m-%dT%H:%M:%S", "%Y-%m-%d %H:%M:%S"]
+
+    def get_metavar(self, param):
+        return "[{}]".format("|".join(self.formats))
+
+    def _try_to_convert_date(self, value, format):
+        try:
+            return datetime.strptime(value, format)
+        except ValueError:
+            return None
+
+    def convert(self, value, param, ctx):
+        # Exact match
+        for format in self.formats:
+            dtime = self._try_to_convert_date(value, format)
+            if dtime:
+                return dtime
+
+        self.fail(
+            "invalid datetime format: {}. (choose from {})".format(
+                value, ", ".join(self.formats)
+            )
+        )
+
+    def __repr__(self):
+        return "DateTime"
+
+
+class IntParamType(ParamType):
+    name = "integer"
+
+    def convert(self, value, param, ctx):
+        try:
+            return int(value)
+        except ValueError:
+            self.fail("{} is not a valid integer".format(value), param, ctx)
+
+    def __repr__(self):
+        return "INT"
+
+
+class IntRange(IntParamType):
+    """A parameter that works similar to :data:`click.INT` but restricts
+    the value to fit into a range.  The default behavior is to fail if the
+    value falls outside the range, but it can also be silently clamped
+    between the two edges.
+
+    See :ref:`ranges` for an example.
+    """
+
+    name = "integer range"
+
+    def __init__(self, min=None, max=None, clamp=False):
+        self.min = min
+        self.max = max
+        self.clamp = clamp
+
+    def convert(self, value, param, ctx):
+        rv = IntParamType.convert(self, value, param, ctx)
+        if self.clamp:
+            if self.min is not None and rv < self.min:
+                return self.min
+            if self.max is not None and rv > self.max:
+                return self.max
+        if (
+            self.min is not None
+            and rv < self.min
+            or self.max is not None
+            and rv > self.max
+        ):
+            if self.min is None:
+                self.fail(
+                    "{} is bigger than the maximum valid value {}.".format(
+                        rv, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+            elif self.max is None:
+                self.fail(
+                    "{} is smaller than the minimum valid value {}.".format(
+                        rv, self.min
+                    ),
+                    param,
+                    ctx,
+                )
+            else:
+                self.fail(
+                    "{} is not in the valid range of {} to {}.".format(
+                        rv, self.min, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+        return rv
+
+    def __repr__(self):
+        return "IntRange({}, {})".format(self.min, self.max)
+
+
+class FloatParamType(ParamType):
+    name = "float"
+
+    def convert(self, value, param, ctx):
+        try:
+            return float(value)
+        except ValueError:
+            self.fail(
+                "{} is not a valid floating point value".format(value), param, ctx
+            )
+
+    def __repr__(self):
+        return "FLOAT"
+
+
+class FloatRange(FloatParamType):
+    """A parameter that works similar to :data:`click.FLOAT` but restricts
+    the value to fit into a range.  The default behavior is to fail if the
+    value falls outside the range, but it can also be silently clamped
+    between the two edges.
+
+    See :ref:`ranges` for an example.
+    """
+
+    name = "float range"
+
+    def __init__(self, min=None, max=None, clamp=False):
+        self.min = min
+        self.max = max
+        self.clamp = clamp
+
+    def convert(self, value, param, ctx):
+        rv = FloatParamType.convert(self, value, param, ctx)
+        if self.clamp:
+            if self.min is not None and rv < self.min:
+                return self.min
+            if self.max is not None and rv > self.max:
+                return self.max
+        if (
+            self.min is not None
+            and rv < self.min
+            or self.max is not None
+            and rv > self.max
+        ):
+            if self.min is None:
+                self.fail(
+                    "{} is bigger than the maximum valid value {}.".format(
+                        rv, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+            elif self.max is None:
+                self.fail(
+                    "{} is smaller than the minimum valid value {}.".format(
+                        rv, self.min
+                    ),
+                    param,
+                    ctx,
+                )
+            else:
+                self.fail(
+                    "{} is not in the valid range of {} to {}.".format(
+                        rv, self.min, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+        return rv
+
+    def __repr__(self):
+        return "FloatRange({}, {})".format(self.min, self.max)
+
+
+class BoolParamType(ParamType):
+    name = "boolean"
+
+    def convert(self, value, param, ctx):
+        if isinstance(value, bool):
+            return bool(value)
+        value = value.lower()
+        if value in ("true", "t", "1", "yes", "y"):
+            return True
+        elif value in ("false", "f", "0", "no", "n"):
+            return False
+        self.fail("{} is not a valid boolean".format(value), param, ctx)
+
+    def __repr__(self):
+        return "BOOL"
+
+
+class UUIDParameterType(ParamType):
+    name = "uuid"
+
+    def convert(self, value, param, ctx):
+        import uuid
+
+        try:
+            if PY2 and isinstance(value, text_type):
+                value = value.encode("ascii")
+            return uuid.UUID(value)
+        except ValueError:
+            self.fail("{} is not a valid UUID value".format(value), param, ctx)
+
+    def __repr__(self):
+        return "UUID"
+
+
+class File(ParamType):
+    """Declares a parameter to be a file for reading or writing.  The file
+    is automatically closed once the context tears down (after the command
+    finished working).
+
+    Files can be opened for reading or writing.  The special value ``-``
+    indicates stdin or stdout depending on the mode.
+
+    By default, the file is opened for reading text data, but it can also be
+    opened in binary mode or for writing.  The encoding parameter can be used
+    to force a specific encoding.
+
+    The `lazy` flag controls if the file should be opened immediately or upon
+    first IO. The default is to be non-lazy for standard input and output
+    streams as well as files opened for reading, `lazy` otherwise. When opening a
+    file lazily for reading, it is still opened temporarily for validation, but
+    will not be held open until first IO. lazy is mainly useful when opening
+    for writing to avoid creating the file until it is needed.
+
+    Starting with Click 2.0, files can also be opened atomically in which
+    case all writes go into a separate file in the same folder and upon
+    completion the file will be moved over to the original location.  This
+    is useful if a file regularly read by other users is modified.
+
+    See :ref:`file-args` for more information.
+    """
+
+    name = "filename"
+    envvar_list_splitter = os.path.pathsep
+
+    def __init__(
+        self, mode="r", encoding=None, errors="strict", lazy=None, atomic=False
+    ):
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+        self.lazy = lazy
+        self.atomic = atomic
+
+    def resolve_lazy_flag(self, value):
+        if self.lazy is not None:
+            return self.lazy
+        if value == "-":
+            return False
+        elif "w" in self.mode:
+            return True
+        return False
+
+    def convert(self, value, param, ctx):
+        try:
+            if hasattr(value, "read") or hasattr(value, "write"):
+                return value
+
+            lazy = self.resolve_lazy_flag(value)
+
+            if lazy:
+                f = LazyFile(
+                    value, self.mode, self.encoding, self.errors, atomic=self.atomic
+                )
+                if ctx is not None:
+                    ctx.call_on_close(f.close_intelligently)
+                return f
+
+            f, should_close = open_stream(
+                value, self.mode, self.encoding, self.errors, atomic=self.atomic
+            )
+            # If a context is provided, we automatically close the file
+            # at the end of the context execution (or flush out).  If a
+            # context does not exist, it's the caller's responsibility to
+            # properly close the file.  This for instance happens when the
+            # type is used with prompts.
+            if ctx is not None:
+                if should_close:
+                    ctx.call_on_close(safecall(f.close))
+                else:
+                    ctx.call_on_close(safecall(f.flush))
+            return f
+        except (IOError, OSError) as e:  # noqa: B014
+            self.fail(
+                "Could not open file: {}: {}".format(
+                    filename_to_ui(value), get_streerror(e)
+                ),
+                param,
+                ctx,
+            )
+
+
+class Path(ParamType):
+    """The path type is similar to the :class:`File` type but it performs
+    different checks.  First of all, instead of returning an open file
+    handle it returns just the filename.  Secondly, it can perform various
+    basic checks about what the file or directory should be.
+
+    .. versionchanged:: 6.0
+       `allow_dash` was added.
+
+    :param exists: if set to true, the file or directory needs to exist for
+                   this value to be valid.  If this is not required and a
+                   file does indeed not exist, then all further checks are
+                   silently skipped.
+    :param file_okay: controls if a file is a possible value.
+    :param dir_okay: controls if a directory is a possible value.
+    :param writable: if true, a writable check is performed.
+    :param readable: if true, a readable check is performed.
+    :param resolve_path: if this is true, then the path is fully resolved
+                         before the value is passed onwards.  This means
+                         that it's absolute and symlinks are resolved.  It
+                         will not expand a tilde-prefix, as this is
+                         supposed to be done by the shell only.
+    :param allow_dash: If this is set to `True`, a single dash to indicate
+                       standard streams is permitted.
+    :param path_type: optionally a string type that should be used to
+                      represent the path.  The default is `None` which
+                      means the return value will be either bytes or
+                      unicode depending on what makes most sense given the
+                      input data Click deals with.
+    """
+
+    envvar_list_splitter = os.path.pathsep
+
+    def __init__(
+        self,
+        exists=False,
+        file_okay=True,
+        dir_okay=True,
+        writable=False,
+        readable=True,
+        resolve_path=False,
+        allow_dash=False,
+        path_type=None,
+    ):
+        self.exists = exists
+        self.file_okay = file_okay
+        self.dir_okay = dir_okay
+        self.writable = writable
+        self.readable = readable
+        self.resolve_path = resolve_path
+        self.allow_dash = allow_dash
+        self.type = path_type
+
+        if self.file_okay and not self.dir_okay:
+            self.name = "file"
+            self.path_type = "File"
+        elif self.dir_okay and not self.file_okay:
+            self.name = "directory"
+            self.path_type = "Directory"
+        else:
+            self.name = "path"
+            self.path_type = "Path"
+
+    def coerce_path_result(self, rv):
+        if self.type is not None and not isinstance(rv, self.type):
+            if self.type is text_type:
+                rv = rv.decode(get_filesystem_encoding())
+            else:
+                rv = rv.encode(get_filesystem_encoding())
+        return rv
+
+    def convert(self, value, param, ctx):
+        rv = value
+
+        is_dash = self.file_okay and self.allow_dash and rv in (b"-", "-")
+
+        if not is_dash:
+            if self.resolve_path:
+                rv = os.path.realpath(rv)
+
+            try:
+                st = os.stat(rv)
+            except OSError:
+                if not self.exists:
+                    return self.coerce_path_result(rv)
+                self.fail(
+                    "{} '{}' does not exist.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+            if not self.file_okay and stat.S_ISREG(st.st_mode):
+                self.fail(
+                    "{} '{}' is a file.".format(self.path_type, filename_to_ui(value)),
+                    param,
+                    ctx,
+                )
+            if not self.dir_okay and stat.S_ISDIR(st.st_mode):
+                self.fail(
+                    "{} '{}' is a directory.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+            if self.writable and not os.access(value, os.W_OK):
+                self.fail(
+                    "{} '{}' is not writable.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+            if self.readable and not os.access(value, os.R_OK):
+                self.fail(
+                    "{} '{}' is not readable.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+        return self.coerce_path_result(rv)
+
+
+class Tuple(CompositeParamType):
+    """The default behavior of Click is to apply a type on a value directly.
+    This works well in most cases, except for when `nargs` is set to a fixed
+    count and different types should be used for different items.  In this
+    case the :class:`Tuple` type can be used.  This type can only be used
+    if `nargs` is set to a fixed number.
+
+    For more information see :ref:`tuple-type`.
+
+    This can be selected by using a Python tuple literal as a type.
+
+    :param types: a list of types that should be used for the tuple items.
+    """
+
+    def __init__(self, types):
+        self.types = [convert_type(ty) for ty in types]
+
+    @property
+    def name(self):
+        return "<{}>".format(" ".join(ty.name for ty in self.types))
+
+    @property
+    def arity(self):
+        return len(self.types)
+
+    def convert(self, value, param, ctx):
+        if len(value) != len(self.types):
+            raise TypeError(
+                "It would appear that nargs is set to conflict with the"
+                " composite type arity."
+            )
+        return tuple(ty(x, param, ctx) for ty, x in zip(self.types, value))
+
+
+def convert_type(ty, default=None):
+    """Converts a callable or python type into the most appropriate
+    param type.
+    """
+    guessed_type = False
+    if ty is None and default is not None:
+        if isinstance(default, tuple):
+            ty = tuple(map(type, default))
+        else:
+            ty = type(default)
+        guessed_type = True
+
+    if isinstance(ty, tuple):
+        return Tuple(ty)
+    if isinstance(ty, ParamType):
+        return ty
+    if ty is text_type or ty is str or ty is None:
+        return STRING
+    if ty is int:
+        return INT
+    # Booleans are only okay if not guessed.  This is done because for
+    # flags the default value is actually a bit of a lie in that it
+    # indicates which of the flags is the one we want.  See get_default()
+    # for more information.
+    if ty is bool and not guessed_type:
+        return BOOL
+    if ty is float:
+        return FLOAT
+    if guessed_type:
+        return STRING
+
+    # Catch a common mistake
+    if __debug__:
+        try:
+            if issubclass(ty, ParamType):
+                raise AssertionError(
+                    "Attempted to use an uninstantiated parameter type ({}).".format(ty)
+                )
+        except TypeError:
+            pass
+    return FuncParamType(ty)
+
+
+#: A dummy parameter type that just does nothing.  From a user's
+#: perspective this appears to just be the same as `STRING` but internally
+#: no string conversion takes place.  This is necessary to achieve the
+#: same bytes/unicode behavior on Python 2/3 in situations where you want
+#: to not convert argument types.  This is usually useful when working
+#: with file paths as they can appear in bytes and unicode.
+#:
+#: For path related uses the :class:`Path` type is a better choice but
+#: there are situations where an unprocessed type is useful which is why
+#: it is is provided.
+#:
+#: .. versionadded:: 4.0
+UNPROCESSED = UnprocessedParamType()
+
+#: A unicode string parameter type which is the implicit default.  This
+#: can also be selected by using ``str`` as type.
+STRING = StringParamType()
+
+#: An integer parameter.  This can also be selected by using ``int`` as
+#: type.
+INT = IntParamType()
+
+#: A floating point value parameter.  This can also be selected by using
+#: ``float`` as type.
+FLOAT = FloatParamType()
+
+#: A boolean parameter.  This is the default for boolean flags.  This can
+#: also be selected by using ``bool`` as a type.
+BOOL = BoolParamType()
+
+#: A UUID parameter.
+UUID = UUIDParameterType()
--- a/matteo_env/Lib/site-packages/click/utils.py
+++ b/matteo_env/Lib/site-packages/click/utils.py
@ -0,0 +1,455 @@
+import os
+import sys
+
+from ._compat import _default_text_stderr
+from ._compat import _default_text_stdout
+from ._compat import auto_wrap_for_ansi
+from ._compat import binary_streams
+from ._compat import filename_to_ui
+from ._compat import get_filesystem_encoding
+from ._compat import get_streerror
+from ._compat import is_bytes
+from ._compat import open_stream
+from ._compat import PY2
+from ._compat import should_strip_ansi
+from ._compat import string_types
+from ._compat import strip_ansi
+from ._compat import text_streams
+from ._compat import text_type
+from ._compat import WIN
+from .globals import resolve_color_default
+
+if not PY2:
+    from ._compat import _find_binary_writer
+elif WIN:
+    from ._winconsole import _get_windows_argv
+    from ._winconsole import _hash_py_argv
+    from ._winconsole import _initial_argv_hash
+
+echo_native_types = string_types + (bytes, bytearray)
+
+
+def _posixify(name):
+    return "-".join(name.split()).lower()
+
+
+def safecall(func):
+    """Wraps a function so that it swallows exceptions."""
+
+    def wrapper(*args, **kwargs):
+        try:
+            return func(*args, **kwargs)
+        except Exception:
+            pass
+
+    return wrapper
+
+
+def make_str(value):
+    """Converts a value into a valid string."""
+    if isinstance(value, bytes):
+        try:
+            return value.decode(get_filesystem_encoding())
+        except UnicodeError:
+            return value.decode("utf-8", "replace")
+    return text_type(value)
+
+
+def make_default_short_help(help, max_length=45):
+    """Return a condensed version of help string."""
+    words = help.split()
+    total_length = 0
+    result = []
+    done = False
+
+    for word in words:
+        if word[-1:] == ".":
+            done = True
+        new_length = 1 + len(word) if result else len(word)
+        if total_length + new_length > max_length:
+            result.append("...")
+            done = True
+        else:
+            if result:
+                result.append(" ")
+            result.append(word)
+        if done:
+            break
+        total_length += new_length
+
+    return "".join(result)
+
+
+class LazyFile(object):
+    """A lazy file works like a regular file but it does not fully open
+    the file but it does perform some basic checks early to see if the
+    filename parameter does make sense.  This is useful for safely opening
+    files for writing.
+    """
+
+    def __init__(
+        self, filename, mode="r", encoding=None, errors="strict", atomic=False
+    ):
+        self.name = filename
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+        self.atomic = atomic
+
+        if filename == "-":
+            self._f, self.should_close = open_stream(filename, mode, encoding, errors)
+        else:
+            if "r" in mode:
+                # Open and close the file in case we're opening it for
+                # reading so that we can catch at least some errors in
+                # some cases early.
+                open(filename, mode).close()
+            self._f = None
+            self.should_close = True
+
+    def __getattr__(self, name):
+        return getattr(self.open(), name)
+
+    def __repr__(self):
+        if self._f is not None:
+            return repr(self._f)
+        return "<unopened file '{}' {}>".format(self.name, self.mode)
+
+    def open(self):
+        """Opens the file if it's not yet open.  This call might fail with
+        a :exc:`FileError`.  Not handling this error will produce an error
+        that Click shows.
+        """
+        if self._f is not None:
+            return self._f
+        try:
+            rv, self.should_close = open_stream(
+                self.name, self.mode, self.encoding, self.errors, atomic=self.atomic
+            )
+        except (IOError, OSError) as e:  # noqa: E402
+            from .exceptions import FileError
+
+            raise FileError(self.name, hint=get_streerror(e))
+        self._f = rv
+        return rv
+
+    def close(self):
+        """Closes the underlying file, no matter what."""
+        if self._f is not None:
+            self._f.close()
+
+    def close_intelligently(self):
+        """This function only closes the file if it was opened by the lazy
+        file wrapper.  For instance this will never close stdin.
+        """
+        if self.should_close:
+            self.close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close_intelligently()
+
+    def __iter__(self):
+        self.open()
+        return iter(self._f)
+
+
+class KeepOpenFile(object):
+    def __init__(self, file):
+        self._file = file
+
+    def __getattr__(self, name):
+        return getattr(self._file, name)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        pass
+
+    def __repr__(self):
+        return repr(self._file)
+
+    def __iter__(self):
+        return iter(self._file)
+
+
+def echo(message=None, file=None, nl=True, err=False, color=None):
+    """Prints a message plus a newline to the given file or stdout.  On
+    first sight, this looks like the print function, but it has improved
+    support for handling Unicode and binary data that does not fail no
+    matter how badly configured the system is.
+
+    Primarily it means that you can print binary data as well as Unicode
+    data on both 2.x and 3.x to the given file in the most appropriate way
+    possible.  This is a very carefree function in that it will try its
+    best to not fail.  As of Click 6.0 this includes support for unicode
+    output on the Windows console.
+
+    In addition to that, if `colorama`_ is installed, the echo function will
+    also support clever handling of ANSI codes.  Essentially it will then
+    do the following:
+
+    -   add transparent handling of ANSI color codes on Windows.
+    -   hide ANSI codes automatically if the destination file is not a
+        terminal.
+
+    .. _colorama: https://pypi.org/project/colorama/
+
+    .. versionchanged:: 6.0
+       As of Click 6.0 the echo function will properly support unicode
+       output on the windows console.  Not that click does not modify
+       the interpreter in any way which means that `sys.stdout` or the
+       print statement or function will still not provide unicode support.
+
+    .. versionchanged:: 2.0
+       Starting with version 2.0 of Click, the echo function will work
+       with colorama if it's installed.
+
+    .. versionadded:: 3.0
+       The `err` parameter was added.
+
+    .. versionchanged:: 4.0
+       Added the `color` flag.
+
+    :param message: the message to print
+    :param file: the file to write to (defaults to ``stdout``)
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``.  This is faster and easier than calling
+                :func:`get_text_stderr` yourself.
+    :param nl: if set to `True` (the default) a newline is printed afterwards.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.
+    """
+    if file is None:
+        if err:
+            file = _default_text_stderr()
+        else:
+            file = _default_text_stdout()
+
+    # Convert non bytes/text into the native string type.
+    if message is not None and not isinstance(message, echo_native_types):
+        message = text_type(message)
+
+    if nl:
+        message = message or u""
+        if isinstance(message, text_type):
+            message += u"\n"
+        else:
+            message += b"\n"
+
+    # If there is a message, and we're in Python 3, and the value looks
+    # like bytes, we manually need to find the binary stream and write the
+    # message in there.  This is done separately so that most stream
+    # types will work as you would expect.  Eg: you can write to StringIO
+    # for other cases.
+    if message and not PY2 and is_bytes(message):
+        binary_file = _find_binary_writer(file)
+        if binary_file is not None:
+            file.flush()
+            binary_file.write(message)
+            binary_file.flush()
+            return
+
+    # ANSI-style support.  If there is no message or we are dealing with
+    # bytes nothing is happening.  If we are connected to a file we want
+    # to strip colors.  If we are on windows we either wrap the stream
+    # to strip the color or we use the colorama support to translate the
+    # ansi codes to API calls.
+    if message and not is_bytes(message):
+        color = resolve_color_default(color)
+        if should_strip_ansi(file, color):
+            message = strip_ansi(message)
+        elif WIN:
+            if auto_wrap_for_ansi is not None:
+                file = auto_wrap_for_ansi(file)
+            elif not color:
+                message = strip_ansi(message)
+
+    if message:
+        file.write(message)
+    file.flush()
+
+
+def get_binary_stream(name):
+    """Returns a system stream for byte processing.  This essentially
+    returns the stream from the sys module with the given name but it
+    solves some compatibility issues between different Python versions.
+    Primarily this function is necessary for getting binary streams on
+    Python 3.
+
+    :param name: the name of the stream to open.  Valid names are ``'stdin'``,
+                 ``'stdout'`` and ``'stderr'``
+    """
+    opener = binary_streams.get(name)
+    if opener is None:
+        raise TypeError("Unknown standard stream '{}'".format(name))
+    return opener()
+
+
+def get_text_stream(name, encoding=None, errors="strict"):
+    """Returns a system stream for text processing.  This usually returns
+    a wrapped stream around a binary stream returned from
+    :func:`get_binary_stream` but it also can take shortcuts on Python 3
+    for already correctly configured streams.
+
+    :param name: the name of the stream to open.  Valid names are ``'stdin'``,
+                 ``'stdout'`` and ``'stderr'``
+    :param encoding: overrides the detected default encoding.
+    :param errors: overrides the default error mode.
+    """
+    opener = text_streams.get(name)
+    if opener is None:
+        raise TypeError("Unknown standard stream '{}'".format(name))
+    return opener(encoding, errors)
+
+
+def open_file(
+    filename, mode="r", encoding=None, errors="strict", lazy=False, atomic=False
+):
+    """This is similar to how the :class:`File` works but for manual
+    usage.  Files are opened non lazy by default.  This can open regular
+    files as well as stdin/stdout if ``'-'`` is passed.
+
+    If stdin/stdout is returned the stream is wrapped so that the context
+    manager will not close the stream accidentally.  This makes it possible
+    to always use the function like this without having to worry to
+    accidentally close a standard stream::
+
+        with open_file(filename) as f:
+            ...
+
+    .. versionadded:: 3.0
+
+    :param filename: the name of the file to open (or ``'-'`` for stdin/stdout).
+    :param mode: the mode in which to open the file.
+    :param encoding: the encoding to use.
+    :param errors: the error handling for this file.
+    :param lazy: can be flipped to true to open the file lazily.
+    :param atomic: in atomic mode writes go into a temporary file and it's
+                   moved on close.
+    """
+    if lazy:
+        return LazyFile(filename, mode, encoding, errors, atomic=atomic)
+    f, should_close = open_stream(filename, mode, encoding, errors, atomic=atomic)
+    if not should_close:
+        f = KeepOpenFile(f)
+    return f
+
+
+def get_os_args():
+    """This returns the argument part of sys.argv in the most appropriate
+    form for processing.  What this means is that this return value is in
+    a format that works for Click to process but does not necessarily
+    correspond well to what's actually standard for the interpreter.
+
+    On most environments the return value is ``sys.argv[:1]`` unchanged.
+    However if you are on Windows and running Python 2 the return value
+    will actually be a list of unicode strings instead because the
+    default behavior on that platform otherwise will not be able to
+    carry all possible values that sys.argv can have.
+
+    .. versionadded:: 6.0
+    """
+    # We can only extract the unicode argv if sys.argv has not been
+    # changed since the startup of the application.
+    if PY2 and WIN and _initial_argv_hash == _hash_py_argv():
+        return _get_windows_argv()
+    return sys.argv[1:]
+
+
+def format_filename(filename, shorten=False):
+    """Formats a filename for user display.  The main purpose of this
+    function is to ensure that the filename can be displayed at all.  This
+    will decode the filename to unicode if necessary in a way that it will
+    not fail.  Optionally, it can shorten the filename to not include the
+    full path to the filename.
+
+    :param filename: formats a filename for UI display.  This will also convert
+                     the filename into unicode without failing.
+    :param shorten: this optionally shortens the filename to strip of the
+                    path that leads up to it.
+    """
+    if shorten:
+        filename = os.path.basename(filename)
+    return filename_to_ui(filename)
+
+
+def get_app_dir(app_name, roaming=True, force_posix=False):
+    r"""Returns the config folder for the application.  The default behavior
+    is to return whatever is most appropriate for the operating system.
+
+    To give you an idea, for an app called ``"Foo Bar"``, something like
+    the following folders could be returned:
+
+    Mac OS X:
+      ``~/Library/Application Support/Foo Bar``
+    Mac OS X (POSIX):
+      ``~/.foo-bar``
+    Unix:
+      ``~/.config/foo-bar``
+    Unix (POSIX):
+      ``~/.foo-bar``
+    Win XP (roaming):
+      ``C:\Documents and Settings\<user>\Local Settings\Application Data\Foo Bar``
+    Win XP (not roaming):
+      ``C:\Documents and Settings\<user>\Application Data\Foo Bar``
+    Win 7 (roaming):
+      ``C:\Users\<user>\AppData\Roaming\Foo Bar``
+    Win 7 (not roaming):
+      ``C:\Users\<user>\AppData\Local\Foo Bar``
+
+    .. versionadded:: 2.0
+
+    :param app_name: the application name.  This should be properly capitalized
+                     and can contain whitespace.
+    :param roaming: controls if the folder should be roaming or not on Windows.
+                    Has no affect otherwise.
+    :param force_posix: if this is set to `True` then on any POSIX system the
+                        folder will be stored in the home folder with a leading
+                        dot instead of the XDG config home or darwin's
+                        application support folder.
+    """
+    if WIN:
+        key = "APPDATA" if roaming else "LOCALAPPDATA"
+        folder = os.environ.get(key)
+        if folder is None:
+            folder = os.path.expanduser("~")
+        return os.path.join(folder, app_name)
+    if force_posix:
+        return os.path.join(os.path.expanduser("~/.{}".format(_posixify(app_name))))
+    if sys.platform == "darwin":
+        return os.path.join(
+            os.path.expanduser("~/Library/Application Support"), app_name
+        )
+    return os.path.join(
+        os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")),
+        _posixify(app_name),
+    )
+
+
+class PacifyFlushWrapper(object):
+    """This wrapper is used to catch and suppress BrokenPipeErrors resulting
+    from ``.flush()`` being called on broken pipe during the shutdown/final-GC
+    of the Python interpreter. Notably ``.flush()`` is always called on
+    ``sys.stdout`` and ``sys.stderr``. So as to have minimal impact on any
+    other cleanup code, and the case where the underlying file is not a broken
+    pipe, all calls and attributes are proxied.
+    """
+
+    def __init__(self, wrapped):
+        self.wrapped = wrapped
+
+    def flush(self):
+        try:
+            self.wrapped.flush()
+        except IOError as e:
+            import errno
+
+            if e.errno != errno.EPIPE:
+                raise
+
+    def __getattr__(self, attr):
+        return getattr(self.wrapped, attr)
--- a/matteo_env/Lib/site-packages/engineio/init.py
+++ b/matteo_env/Lib/site-packages/engineio/init.py
@ -0,0 +1,25 @@
+import sys
+
+from .client import Client
+from .middleware import WSGIApp, Middleware
+from .server import Server
+if sys.version_info >= (3, 5):  # pragma: no cover
+    from .asyncio_server import AsyncServer
+    from .asyncio_client import AsyncClient
+    from .async_drivers.asgi import ASGIApp
+    try:
+        from .async_drivers.tornado import get_tornado_handler
+    except ImportError:
+        get_tornado_handler = None
+else:  # pragma: no cover
+    AsyncServer = None
+    AsyncClient = None
+    get_tornado_handler = None
+    ASGIApp = None
+
+__version__ = '4.0.0'
+
+__all__ = ['__version__', 'Server', 'WSGIApp', 'Middleware', 'Client']
+if AsyncServer is not None:  # pragma: no cover
+    __all__ += ['AsyncServer', 'ASGIApp', 'get_tornado_handler',
+                'AsyncClient'],
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/init.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/init.py
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/aiohttp.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/aiohttp.py
@ -0,0 +1,127 @@
+import asyncio
+import sys
+from urllib.parse import urlsplit
+
+from aiohttp.web import Response, WebSocketResponse
+
+
+def create_route(app, engineio_server, engineio_endpoint):
+    """This function sets up the engine.io endpoint as a route for the
+    application.
+
+    Note that both GET and POST requests must be hooked up on the engine.io
+    endpoint.
+    """
+    app.router.add_get(engineio_endpoint, engineio_server.handle_request)
+    app.router.add_post(engineio_endpoint, engineio_server.handle_request)
+    app.router.add_route('OPTIONS', engineio_endpoint,
+                         engineio_server.handle_request)
+
+
+def translate_request(request):
+    """This function takes the arguments passed to the request handler and
+    uses them to generate a WSGI compatible environ dictionary.
+    """
+    message = request._message
+    payload = request._payload
+
+    uri_parts = urlsplit(message.path)
+    environ = {
+        'wsgi.input': payload,
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'aiohttp',
+        'REQUEST_METHOD': message.method,
+        'QUERY_STRING': uri_parts.query or '',
+        'RAW_URI': message.path,
+        'SERVER_PROTOCOL': 'HTTP/%s.%s' % message.version,
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'aiohttp',
+        'SERVER_PORT': '0',
+        'aiohttp.request': request
+    }
+
+    for hdr_name, hdr_value in message.headers.items():
+        hdr_name = hdr_name.upper()
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        if key in environ:
+            hdr_value = '%s,%s' % (environ[key], hdr_value)
+
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+
+    path_info = uri_parts.path
+
+    environ['PATH_INFO'] = path_info
+    environ['SCRIPT_NAME'] = ''
+
+    return environ
+
+
+def make_response(status, headers, payload, environ):
+    """This function generates an appropriate response object for this async
+    mode.
+    """
+    return Response(body=payload, status=int(status.split()[0]),
+                    headers=headers)
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a aiohttp WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler):
+        self.handler = handler
+        self._sock = None
+
+    async def __call__(self, environ):
+        request = environ['aiohttp.request']
+        self._sock = WebSocketResponse()
+        await self._sock.prepare(request)
+
+        self.environ = environ
+        await self.handler(self)
+        return self._sock
+
+    async def close(self):
+        await self._sock.close()
+
+    async def send(self, message):
+        if isinstance(message, bytes):
+            f = self._sock.send_bytes
+        else:
+            f = self._sock.send_str
+        if asyncio.iscoroutinefunction(f):
+            await f(message)
+        else:
+            f(message)
+
+    async def wait(self):
+        msg = await self._sock.receive()
+        if not isinstance(msg.data, bytes) and \
+                not isinstance(msg.data, str):
+            raise IOError()
+        return msg.data
+
+
+_async = {
+    'asyncio': True,
+    'create_route': create_route,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/asgi.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/asgi.py
@ -0,0 +1,250 @@
+import os
+import sys
+import asyncio
+
+from engineio.static_files import get_static_file
+
+
+class ASGIApp:
+    """ASGI application middleware for Engine.IO.
+
+    This middleware dispatches traffic to an Engine.IO application. It can
+    also serve a list of static files to the client, or forward unrelated
+    HTTP traffic to another ASGI application.
+
+    :param engineio_server: The Engine.IO server. Must be an instance of the
+                            ``engineio.AsyncServer`` class.
+    :param static_files: A dictionary with static file mapping rules. See the
+                         documentation for details on this argument.
+    :param other_asgi_app: A separate ASGI app that receives all other traffic.
+    :param engineio_path: The endpoint where the Engine.IO application should
+                          be installed. The default value is appropriate for
+                          most cases.
+    :param on_startup: function to be called on application startup; can be
+                       coroutine
+    :param on_shutdown: function to be called on application shutdown; can be
+                        coroutine
+
+    Example usage::
+
+        import engineio
+        import uvicorn
+
+        eio = engineio.AsyncServer()
+        app = engineio.ASGIApp(eio, static_files={
+            '/': {'content_type': 'text/html', 'filename': 'index.html'},
+            '/index.html': {'content_type': 'text/html',
+                            'filename': 'index.html'},
+        })
+        uvicorn.run(app, '127.0.0.1', 5000)
+    """
+    def __init__(self, engineio_server, other_asgi_app=None,
+                 static_files=None, engineio_path='engine.io',
+                 on_startup=None, on_shutdown=None):
+        self.engineio_server = engineio_server
+        self.other_asgi_app = other_asgi_app
+        self.engineio_path = engineio_path.strip('/')
+        self.static_files = static_files or {}
+        self.on_startup = on_startup
+        self.on_shutdown = on_shutdown
+
+    async def __call__(self, scope, receive, send):
+        if scope['type'] in ['http', 'websocket'] and \
+                scope['path'].startswith('/{0}/'.format(self.engineio_path)):
+            await self.engineio_server.handle_request(scope, receive, send)
+        else:
+            static_file = get_static_file(scope['path'], self.static_files) \
+                if scope['type'] == 'http' and self.static_files else None
+            if static_file:
+                await self.serve_static_file(static_file, receive, send)
+            elif self.other_asgi_app is not None:
+                await self.other_asgi_app(scope, receive, send)
+            elif scope['type'] == 'lifespan':
+                await self.lifespan(receive, send)
+            else:
+                await self.not_found(receive, send)
+
+    async def serve_static_file(self, static_file, receive,
+                                send):  # pragma: no cover
+        event = await receive()
+        if event['type'] == 'http.request':
+            if os.path.exists(static_file['filename']):
+                with open(static_file['filename'], 'rb') as f:
+                    payload = f.read()
+                await send({'type': 'http.response.start',
+                            'status': 200,
+                            'headers': [(b'Content-Type', static_file[
+                                'content_type'].encode('utf-8'))]})
+                await send({'type': 'http.response.body',
+                            'body': payload})
+            else:
+                await self.not_found(receive, send)
+
+    async def lifespan(self, receive, send):
+        while True:
+            event = await receive()
+            if event['type'] == 'lifespan.startup':
+                if self.on_startup:
+                    try:
+                        await self.on_startup() \
+                            if asyncio.iscoroutinefunction(self.on_startup) \
+                            else self.on_startup()
+                    except:
+                        await send({'type': 'lifespan.startup.failed'})
+                        return
+                await send({'type': 'lifespan.startup.complete'})
+            elif event['type'] == 'lifespan.shutdown':
+                if self.on_shutdown:
+                    try:
+                        await self.on_shutdown() \
+                            if asyncio.iscoroutinefunction(self.on_shutdown) \
+                            else self.on_shutdown()
+                    except:
+                        await send({'type': 'lifespan.shutdown.failed'})
+                        return
+                await send({'type': 'lifespan.shutdown.complete'})
+                return
+
+    async def not_found(self, receive, send):
+        """Return a 404 Not Found error to the client."""
+        await send({'type': 'http.response.start',
+                    'status': 404,
+                    'headers': [(b'Content-Type', b'text/plain')]})
+        await send({'type': 'http.response.body',
+                    'body': b'Not Found'})
+
+
+async def translate_request(scope, receive, send):
+    class AwaitablePayload(object):  # pragma: no cover
+        def __init__(self, payload):
+            self.payload = payload or b''
+
+        async def read(self, length=None):
+            if length is None:
+                r = self.payload
+                self.payload = b''
+            else:
+                r = self.payload[:length]
+                self.payload = self.payload[length:]
+            return r
+
+    event = await receive()
+    payload = b''
+    if event['type'] == 'http.request':
+        payload += event.get('body') or b''
+        while event.get('more_body'):
+            event = await receive()
+            if event['type'] == 'http.request':
+                payload += event.get('body') or b''
+    elif event['type'] == 'websocket.connect':
+        pass
+    else:
+        return {}
+
+    raw_uri = scope['path'].encode('utf-8')
+    if 'query_string' in scope and scope['query_string']:
+        raw_uri += b'?' + scope['query_string']
+    environ = {
+        'wsgi.input': AwaitablePayload(payload),
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'asgi',
+        'REQUEST_METHOD': scope.get('method', 'GET'),
+        'PATH_INFO': scope['path'],
+        'QUERY_STRING': scope.get('query_string', b'').decode('utf-8'),
+        'RAW_URI': raw_uri.decode('utf-8'),
+        'SCRIPT_NAME': '',
+        'SERVER_PROTOCOL': 'HTTP/1.1',
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'asgi',
+        'SERVER_PORT': '0',
+        'asgi.receive': receive,
+        'asgi.send': send,
+        'asgi.scope': scope,
+    }
+
+    for hdr_name, hdr_value in scope['headers']:
+        hdr_name = hdr_name.upper().decode('utf-8')
+        hdr_value = hdr_value.decode('utf-8')
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        if key in environ:
+            hdr_value = '%s,%s' % (environ[key], hdr_value)
+
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+    return environ
+
+
+async def make_response(status, headers, payload, environ):
+    headers = [(h[0].encode('utf-8'), h[1].encode('utf-8')) for h in headers]
+    if 'HTTP_SEC_WEBSOCKET_VERSION' in environ:
+        if status.startswith('200 '):
+            await environ['asgi.send']({'type': 'websocket.accept',
+                                        'headers': headers})
+        else:
+            await environ['asgi.send']({'type': 'websocket.close'})
+        return
+
+    await environ['asgi.send']({'type': 'http.response.start',
+                                'status': int(status.split(' ')[0]),
+                                'headers': headers})
+    await environ['asgi.send']({'type': 'http.response.body',
+                                'body': payload})
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides an asgi WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler):
+        self.handler = handler
+        self.asgi_receive = None
+        self.asgi_send = None
+
+    async def __call__(self, environ):
+        self.asgi_receive = environ['asgi.receive']
+        self.asgi_send = environ['asgi.send']
+        await self.asgi_send({'type': 'websocket.accept'})
+        await self.handler(self)
+
+    async def close(self):
+        await self.asgi_send({'type': 'websocket.close'})
+
+    async def send(self, message):
+        msg_bytes = None
+        msg_text = None
+        if isinstance(message, bytes):
+            msg_bytes = message
+        else:
+            msg_text = message
+        await self.asgi_send({'type': 'websocket.send',
+                              'bytes': msg_bytes,
+                              'text': msg_text})
+
+    async def wait(self):
+        event = await self.asgi_receive()
+        if event['type'] != 'websocket.receive':
+            raise IOError()
+        return event.get('bytes') or event.get('text')
+
+
+_async = {
+    'asyncio': True,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/eventlet.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/eventlet.py
@ -0,0 +1,30 @@
+from __future__ import absolute_import
+
+from eventlet.green.threading import Thread, Event
+from eventlet import queue
+from eventlet import sleep
+from eventlet.websocket import WebSocketWSGI as _WebSocketWSGI
+
+
+class WebSocketWSGI(_WebSocketWSGI):
+    def __init__(self, *args, **kwargs):
+        super(WebSocketWSGI, self).__init__(*args, **kwargs)
+        self._sock = None
+
+    def __call__(self, environ, start_response):
+        if 'eventlet.input' not in environ:
+            raise RuntimeError('You need to use the eventlet server. '
+                               'See the Deployment section of the '
+                               'documentation for more information.')
+        self._sock = environ['eventlet.input'].get_socket()
+        return super(WebSocketWSGI, self).__call__(environ, start_response)
+
+
+_async = {
+    'thread': Thread,
+    'queue': queue.Queue,
+    'queue_empty': queue.Empty,
+    'event': Event,
+    'websocket': WebSocketWSGI,
+    'sleep': sleep,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/gevent.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/gevent.py
@ -0,0 +1,63 @@
+from __future__ import absolute_import
+
+import gevent
+from gevent import queue
+from gevent.event import Event
+try:
+    import geventwebsocket  # noqa
+    _websocket_available = True
+except ImportError:
+    _websocket_available = False
+
+
+class Thread(gevent.Greenlet):  # pragma: no cover
+    """
+    This wrapper class provides gevent Greenlet interface that is compatible
+    with the standard library's Thread class.
+    """
+    def __init__(self, target, args=[], kwargs={}):
+        super(Thread, self).__init__(target, *args, **kwargs)
+
+    def _run(self):
+        return self.run()
+
+
+class WebSocketWSGI(object):  # pragma: no cover
+    """
+    This wrapper class provides a gevent WebSocket interface that is
+    compatible with eventlet's implementation.
+    """
+    def __init__(self, app):
+        self.app = app
+
+    def __call__(self, environ, start_response):
+        if 'wsgi.websocket' not in environ:
+            raise RuntimeError('You need to use the gevent-websocket server. '
+                               'See the Deployment section of the '
+                               'documentation for more information.')
+        self._sock = environ['wsgi.websocket']
+        self.environ = environ
+        self.version = self._sock.version
+        self.path = self._sock.path
+        self.origin = self._sock.origin
+        self.protocol = self._sock.protocol
+        return self.app(self)
+
+    def close(self):
+        return self._sock.close()
+
+    def send(self, message):
+        return self._sock.send(message)
+
+    def wait(self):
+        return self._sock.receive()
+
+
+_async = {
+    'thread': Thread,
+    'queue': queue.JoinableQueue,
+    'queue_empty': queue.Empty,
+    'event': Event,
+    'websocket': WebSocketWSGI if _websocket_available else None,
+    'sleep': gevent.sleep,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/gevent_uwsgi.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/gevent_uwsgi.py
@ -0,0 +1,154 @@
+from __future__ import absolute_import
+
+import gevent
+from gevent import queue
+from gevent.event import Event
+import uwsgi
+_websocket_available = hasattr(uwsgi, 'websocket_handshake')
+
+
+class Thread(gevent.Greenlet):  # pragma: no cover
+    """
+    This wrapper class provides gevent Greenlet interface that is compatible
+    with the standard library's Thread class.
+    """
+    def __init__(self, target, args=[], kwargs={}):
+        super(Thread, self).__init__(target, *args, **kwargs)
+
+    def _run(self):
+        return self.run()
+
+
+class uWSGIWebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a uWSGI WebSocket interface that is
+    compatible with eventlet's implementation.
+    """
+    def __init__(self, app):
+        self.app = app
+        self._sock = None
+
+    def __call__(self, environ, start_response):
+        self._sock = uwsgi.connection_fd()
+        self.environ = environ
+
+        uwsgi.websocket_handshake()
+
+        self._req_ctx = None
+        if hasattr(uwsgi, 'request_context'):
+            # uWSGI >= 2.1.x with support for api access across-greenlets
+            self._req_ctx = uwsgi.request_context()
+        else:
+            # use event and queue for sending messages
+            from gevent.event import Event
+            from gevent.queue import Queue
+            from gevent.select import select
+            self._event = Event()
+            self._send_queue = Queue()
+
+            # spawn a select greenlet
+            def select_greenlet_runner(fd, event):
+                """Sets event when data becomes available to read on fd."""
+                while True:
+                    event.set()
+                    try:
+                        select([fd], [], [])[0]
+                    except ValueError:
+                        break
+            self._select_greenlet = gevent.spawn(
+                select_greenlet_runner,
+                self._sock,
+                self._event)
+
+        self.app(self)
+
+    def close(self):
+        """Disconnects uWSGI from the client."""
+        uwsgi.disconnect()
+        if self._req_ctx is None:
+            # better kill it here in case wait() is not called again
+            self._select_greenlet.kill()
+            self._event.set()
+
+    def _send(self, msg):
+        """Transmits message either in binary or UTF-8 text mode,
+        depending on its type."""
+        if isinstance(msg, bytes):
+            method = uwsgi.websocket_send_binary
+        else:
+            method = uwsgi.websocket_send
+        if self._req_ctx is not None:
+            method(msg, request_context=self._req_ctx)
+        else:
+            method(msg)
+
+    def _decode_received(self, msg):
+        """Returns either bytes or str, depending on message type."""
+        if not isinstance(msg, bytes):
+            # already decoded - do nothing
+            return msg
+        # only decode from utf-8 if message is not binary data
+        type = ord(msg[0:1])
+        if type >= 48:  # no binary
+            return msg.decode('utf-8')
+        # binary message, don't try to decode
+        return msg
+
+    def send(self, msg):
+        """Queues a message for sending. Real transmission is done in
+        wait method.
+        Sends directly if uWSGI version is new enough."""
+        if self._req_ctx is not None:
+            self._send(msg)
+        else:
+            self._send_queue.put(msg)
+            self._event.set()
+
+    def wait(self):
+        """Waits and returns received messages.
+        If running in compatibility mode for older uWSGI versions,
+        it also sends messages that have been queued by send().
+        A return value of None means that connection was closed.
+        This must be called repeatedly. For uWSGI < 2.1.x it must
+        be called from the main greenlet."""
+        while True:
+            if self._req_ctx is not None:
+                try:
+                    msg = uwsgi.websocket_recv(request_context=self._req_ctx)
+                except IOError:  # connection closed
+                    return None
+                return self._decode_received(msg)
+            else:
+                # we wake up at least every 3 seconds to let uWSGI
+                # do its ping/ponging
+                event_set = self._event.wait(timeout=3)
+                if event_set:
+                    self._event.clear()
+                    # maybe there is something to send
+                    msgs = []
+                    while True:
+                        try:
+                            msgs.append(self._send_queue.get(block=False))
+                        except gevent.queue.Empty:
+                            break
+                    for msg in msgs:
+                        self._send(msg)
+                # maybe there is something to receive, if not, at least
+                # ensure uWSGI does its ping/ponging
+                try:
+                    msg = uwsgi.websocket_recv_nb()
+                except IOError:  # connection closed
+                    self._select_greenlet.kill()
+                    return None
+                if msg:  # message available
+                    return self._decode_received(msg)
+
+
+_async = {
+    'thread': Thread,
+    'queue': queue.JoinableQueue,
+    'queue_empty': queue.Empty,
+    'event': Event,
+    'websocket': uWSGIWebSocket if _websocket_available else None,
+    'sleep': gevent.sleep,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/sanic.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/sanic.py
@ -0,0 +1,143 @@
+import sys
+from urllib.parse import urlsplit
+
+try:  # pragma: no cover
+    from sanic.response import HTTPResponse
+    from sanic.websocket import WebSocketProtocol
+except ImportError:
+    HTTPResponse = None
+    WebSocketProtocol = None
+
+
+def create_route(app, engineio_server, engineio_endpoint):  # pragma: no cover
+    """This function sets up the engine.io endpoint as a route for the
+    application.
+
+    Note that both GET and POST requests must be hooked up on the engine.io
+    endpoint.
+    """
+    app.add_route(engineio_server.handle_request, engineio_endpoint,
+                  methods=['GET', 'POST', 'OPTIONS'])
+    try:
+        app.enable_websocket()
+    except AttributeError:
+        # ignore, this version does not support websocket
+        pass
+
+
+def translate_request(request):  # pragma: no cover
+    """This function takes the arguments passed to the request handler and
+    uses them to generate a WSGI compatible environ dictionary.
+    """
+    class AwaitablePayload(object):
+        def __init__(self, payload):
+            self.payload = payload or b''
+
+        async def read(self, length=None):
+            if length is None:
+                r = self.payload
+                self.payload = b''
+            else:
+                r = self.payload[:length]
+                self.payload = self.payload[length:]
+            return r
+
+    uri_parts = urlsplit(request.url)
+    environ = {
+        'wsgi.input': AwaitablePayload(request.body),
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'sanic',
+        'REQUEST_METHOD': request.method,
+        'QUERY_STRING': uri_parts.query or '',
+        'RAW_URI': request.url,
+        'SERVER_PROTOCOL': 'HTTP/' + request.version,
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'sanic',
+        'SERVER_PORT': '0',
+        'sanic.request': request
+    }
+
+    for hdr_name, hdr_value in request.headers.items():
+        hdr_name = hdr_name.upper()
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        if key in environ:
+            hdr_value = '%s,%s' % (environ[key], hdr_value)
+
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+
+    path_info = uri_parts.path
+
+    environ['PATH_INFO'] = path_info
+    environ['SCRIPT_NAME'] = ''
+
+    return environ
+
+
+def make_response(status, headers, payload, environ):  # pragma: no cover
+    """This function generates an appropriate response object for this async
+    mode.
+    """
+    headers_dict = {}
+    content_type = None
+    for h in headers:
+        if h[0].lower() == 'content-type':
+            content_type = h[1]
+        else:
+            headers_dict[h[0]] = h[1]
+    return HTTPResponse(body_bytes=payload, content_type=content_type,
+                        status=int(status.split()[0]), headers=headers_dict)
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a sanic WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler):
+        self.handler = handler
+        self._sock = None
+
+    async def __call__(self, environ):
+        request = environ['sanic.request']
+        protocol = request.transport.get_protocol()
+        self._sock = await protocol.websocket_handshake(request)
+
+        self.environ = environ
+        await self.handler(self)
+
+    async def close(self):
+        await self._sock.close()
+
+    async def send(self, message):
+        await self._sock.send(message)
+
+    async def wait(self):
+        data = await self._sock.recv()
+        if not isinstance(data, bytes) and \
+                not isinstance(data, str):
+            raise IOError()
+        return data
+
+
+_async = {
+    'asyncio': True,
+    'create_route': create_route,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket if WebSocketProtocol else None,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/threading.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/threading.py
@ -0,0 +1,17 @@
+from __future__ import absolute_import
+import threading
+import time
+
+try:
+    import queue
+except ImportError:  # pragma: no cover
+    import Queue as queue
+
+_async = {
+    'thread': threading.Thread,
+    'queue': queue.Queue,
+    'queue_empty': queue.Empty,
+    'event': threading.Event,
+    'websocket': None,
+    'sleep': time.sleep,
+}
--- a/matteo_env/Lib/site-packages/engineio/async_drivers/tornado.py
+++ b/matteo_env/Lib/site-packages/engineio/async_drivers/tornado.py
@ -0,0 +1,182 @@
+import asyncio
+import sys
+from urllib.parse import urlsplit
+from .. import exceptions
+
+import tornado.web
+import tornado.websocket
+
+
+def get_tornado_handler(engineio_server):
+    class Handler(tornado.websocket.WebSocketHandler):  # pragma: no cover
+        def __init__(self, *args, **kwargs):
+            super().__init__(*args, **kwargs)
+            if isinstance(engineio_server.cors_allowed_origins, str):
+                if engineio_server.cors_allowed_origins == '*':
+                    self.allowed_origins = None
+                else:
+                    self.allowed_origins = [
+                        engineio_server.cors_allowed_origins]
+            else:
+                self.allowed_origins = engineio_server.cors_allowed_origins
+            self.receive_queue = asyncio.Queue()
+
+        async def get(self, *args, **kwargs):
+            if self.request.headers.get('Upgrade', '').lower() == 'websocket':
+                ret = super().get(*args, **kwargs)
+                if asyncio.iscoroutine(ret):
+                    await ret
+            else:
+                await engineio_server.handle_request(self)
+
+        async def open(self, *args, **kwargs):
+            # this is the handler for the websocket request
+            asyncio.ensure_future(engineio_server.handle_request(self))
+
+        async def post(self, *args, **kwargs):
+            await engineio_server.handle_request(self)
+
+        async def options(self, *args, **kwargs):
+            await engineio_server.handle_request(self)
+
+        async def on_message(self, message):
+            await self.receive_queue.put(message)
+
+        async def get_next_message(self):
+            return await self.receive_queue.get()
+
+        def on_close(self):
+            self.receive_queue.put_nowait(None)
+
+        def check_origin(self, origin):
+            if self.allowed_origins is None or origin in self.allowed_origins:
+                return True
+            return super().check_origin(origin)
+
+        def get_compression_options(self):
+            # enable compression
+            return {}
+
+    return Handler
+
+
+def translate_request(handler):
+    """This function takes the arguments passed to the request handler and
+    uses them to generate a WSGI compatible environ dictionary.
+    """
+    class AwaitablePayload(object):
+        def __init__(self, payload):
+            self.payload = payload or b''
+
+        async def read(self, length=None):
+            if length is None:
+                r = self.payload
+                self.payload = b''
+            else:
+                r = self.payload[:length]
+                self.payload = self.payload[length:]
+            return r
+
+    payload = handler.request.body
+
+    uri_parts = urlsplit(handler.request.path)
+    full_uri = handler.request.path
+    if handler.request.query:  # pragma: no cover
+        full_uri += '?' + handler.request.query
+    environ = {
+        'wsgi.input': AwaitablePayload(payload),
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'aiohttp',
+        'REQUEST_METHOD': handler.request.method,
+        'QUERY_STRING': handler.request.query or '',
+        'RAW_URI': full_uri,
+        'SERVER_PROTOCOL': 'HTTP/%s' % handler.request.version,
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'aiohttp',
+        'SERVER_PORT': '0',
+        'tornado.handler': handler
+    }
+
+    for hdr_name, hdr_value in handler.request.headers.items():
+        hdr_name = hdr_name.upper()
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+
+    path_info = uri_parts.path
+
+    environ['PATH_INFO'] = path_info
+    environ['SCRIPT_NAME'] = ''
+
+    return environ
+
+
+def make_response(status, headers, payload, environ):
+    """This function generates an appropriate response object for this async
+    mode.
+    """
+    tornado_handler = environ['tornado.handler']
+    try:
+        tornado_handler.set_status(int(status.split()[0]))
+    except RuntimeError:  # pragma: no cover
+        # for websocket connections Tornado does not accept a response, since
+        # it already emitted the 101 status code
+        return
+    for header, value in headers:
+        tornado_handler.set_header(header, value)
+    tornado_handler.write(payload)
+    tornado_handler.finish()
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a tornado WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler):
+        self.handler = handler
+        self.tornado_handler = None
+
+    async def __call__(self, environ):
+        self.tornado_handler = environ['tornado.handler']
+        self.environ = environ
+        await self.handler(self)
+
+    async def close(self):
+        self.tornado_handler.close()
+
+    async def send(self, message):
+        try:
+            self.tornado_handler.write_message(
+                message, binary=isinstance(message, bytes))
+        except tornado.websocket.WebSocketClosedError:
+            raise exceptions.EngineIOError()
+
+    async def wait(self):
+        msg = await self.tornado_handler.get_next_message()
+        if not isinstance(msg, bytes) and \
+                not isinstance(msg, str):
+            raise IOError()
+        return msg
+
+
+_async = {
+    'asyncio': True,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket,
+}
--- a/matteo_env/Lib/site-packages/engineio/asyncio_client.py
+++ b/matteo_env/Lib/site-packages/engineio/asyncio_client.py
@ -0,0 +1,608 @@
+import asyncio
+import signal
+import ssl
+import threading
+
+try:
+    import aiohttp
+except ImportError:  # pragma: no cover
+    aiohttp = None
+
+from . import client
+from . import exceptions
+from . import packet
+from . import payload
+
+async_signal_handler_set = False
+
+
+def async_signal_handler():
+    """SIGINT handler.
+
+    Disconnect all active async clients.
+    """
+    async def _handler():
+        asyncio.get_event_loop().stop()
+        for c in client.connected_clients[:]:
+            if c.is_asyncio_based():
+                await c.disconnect()
+        else:  # pragma: no cover
+            pass
+
+    asyncio.ensure_future(_handler())
+
+
+class AsyncClient(client.Client):
+    """An Engine.IO client for asyncio.
+
+    This class implements a fully compliant Engine.IO web client with support
+    for websocket and long-polling transports, compatible with the asyncio
+    framework on Python 3.5 or newer.
+
+    :param logger: To enable logging set to ``True`` or pass a logger object to
+                   use. To disable logging set to ``False``. The default is
+                   ``False``. Note that fatal errors are logged even when
+                   ``logger`` is ``False``.
+    :param json: An alternative json module to use for encoding and decoding
+                 packets. Custom json modules must have ``dumps`` and ``loads``
+                 functions that are compatible with the standard library
+                 versions.
+    :param request_timeout: A timeout in seconds for requests. The default is
+                            5 seconds.
+    :param http_session: an initialized ``aiohttp.ClientSession`` object to be
+                         used when sending requests to the server. Use it if
+                         you need to add special client options such as proxy
+                         servers, SSL certificates, etc.
+    :param ssl_verify: ``True`` to verify SSL certificates, or ``False`` to
+                       skip SSL certificate verification, allowing
+                       connections to servers with self signed certificates.
+                       The default is ``True``.
+    """
+    def is_asyncio_based(self):
+        return True
+
+    async def connect(self, url, headers=None, transports=None,
+                      engineio_path='engine.io'):
+        """Connect to an Engine.IO server.
+
+        :param url: The URL of the Engine.IO server. It can include custom
+                    query string parameters if required by the server.
+        :param headers: A dictionary with custom headers to send with the
+                        connection request.
+        :param transports: The list of allowed transports. Valid transports
+                           are ``'polling'`` and ``'websocket'``. If not
+                           given, the polling transport is connected first,
+                           then an upgrade to websocket is attempted.
+        :param engineio_path: The endpoint where the Engine.IO server is
+                              installed. The default value is appropriate for
+                              most cases.
+
+        Note: this method is a coroutine.
+
+        Example usage::
+
+            eio = engineio.Client()
+            await eio.connect('http://localhost:5000')
+        """
+        global async_signal_handler_set
+        if not async_signal_handler_set and \
+                threading.current_thread() == threading.main_thread():
+
+            try:
+                asyncio.get_event_loop().add_signal_handler(
+                    signal.SIGINT, async_signal_handler)
+                async_signal_handler_set = True
+            except NotImplementedError:  # pragma: no cover
+                self.logger.warning('Signal handler is unsupported')
+
+        if self.state != 'disconnected':
+            raise ValueError('Client is not in a disconnected state')
+        valid_transports = ['polling', 'websocket']
+        if transports is not None:
+            if isinstance(transports, str):
+                transports = [transports]
+            transports = [transport for transport in transports
+                          if transport in valid_transports]
+            if not transports:
+                raise ValueError('No valid transports provided')
+        self.transports = transports or valid_transports
+        self.queue = self.create_queue()
+        return await getattr(self, '_connect_' + self.transports[0])(
+            url, headers or {}, engineio_path)
+
+    async def wait(self):
+        """Wait until the connection with the server ends.
+
+        Client applications can use this function to block the main thread
+        during the life of the connection.
+
+        Note: this method is a coroutine.
+        """
+        if self.read_loop_task:
+            await self.read_loop_task
+
+    async def send(self, data):
+        """Send a message to a client.
+
+        :param data: The data to send to the client. Data can be of type
+                     ``str``, ``bytes``, ``list`` or ``dict``. If a ``list``
+                     or ``dict``, the data will be serialized as JSON.
+
+        Note: this method is a coroutine.
+        """
+        await self._send_packet(packet.Packet(packet.MESSAGE, data=data))
+
+    async def disconnect(self, abort=False):
+        """Disconnect from the server.
+
+        :param abort: If set to ``True``, do not wait for background tasks
+                      associated with the connection to end.
+
+        Note: this method is a coroutine.
+        """
+        if self.state == 'connected':
+            await self._send_packet(packet.Packet(packet.CLOSE))
+            await self.queue.put(None)
+            self.state = 'disconnecting'
+            await self._trigger_event('disconnect', run_async=False)
+            if self.current_transport == 'websocket':
+                await self.ws.close()
+            if not abort:
+                await self.read_loop_task
+            self.state = 'disconnected'
+            try:
+                client.connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+        self._reset()
+
+    def start_background_task(self, target, *args, **kwargs):
+        """Start a background task.
+
+        This is a utility function that applications can use to start a
+        background task.
+
+        :param target: the target function to execute.
+        :param args: arguments to pass to the function.
+        :param kwargs: keyword arguments to pass to the function.
+
+        This function returns an object compatible with the `Thread` class in
+        the Python standard library. The `start()` method on this object is
+        already called by this function.
+
+        Note: this method is a coroutine.
+        """
+        return asyncio.ensure_future(target(*args, **kwargs))
+
+    async def sleep(self, seconds=0):
+        """Sleep for the requested amount of time.
+
+        Note: this method is a coroutine.
+        """
+        return await asyncio.sleep(seconds)
+
+    def create_queue(self):
+        """Create a queue object."""
+        q = asyncio.Queue()
+        q.Empty = asyncio.QueueEmpty
+        return q
+
+    def create_event(self):
+        """Create an event object."""
+        return asyncio.Event()
+
+    def _reset(self):
+        if self.http:  # pragma: no cover
+            asyncio.ensure_future(self.http.close())
+        super()._reset()
+
+    async def _connect_polling(self, url, headers, engineio_path):
+        """Establish a long-polling connection to the Engine.IO server."""
+        if aiohttp is None:  # pragma: no cover
+            self.logger.error('aiohttp not installed -- cannot make HTTP '
+                              'requests!')
+            return
+        self.base_url = self._get_engineio_url(url, engineio_path, 'polling')
+        self.logger.info('Attempting polling connection to ' + self.base_url)
+        r = await self._send_request(
+            'GET', self.base_url + self._get_url_timestamp(), headers=headers,
+            timeout=self.request_timeout)
+        if r is None:
+            self._reset()
+            raise exceptions.ConnectionError(
+                'Connection refused by the server')
+        if r.status < 200 or r.status >= 300:
+            self._reset()
+            try:
+                arg = await r.json()
+            except aiohttp.ClientError:
+                arg = None
+            raise exceptions.ConnectionError(
+                'Unexpected status code {} in server response'.format(
+                    r.status), arg)
+        try:
+            p = payload.Payload(encoded_payload=(await r.read()).decode(
+                'utf-8'))
+        except ValueError:
+            raise exceptions.ConnectionError(
+                'Unexpected response from server') from None
+        open_packet = p.packets[0]
+        if open_packet.packet_type != packet.OPEN:
+            raise exceptions.ConnectionError(
+                'OPEN packet not returned by server')
+        self.logger.info(
+            'Polling connection accepted with ' + str(open_packet.data))
+        self.sid = open_packet.data['sid']
+        self.upgrades = open_packet.data['upgrades']
+        self.ping_interval = int(open_packet.data['pingInterval']) / 1000.0
+        self.ping_timeout = int(open_packet.data['pingTimeout']) / 1000.0
+        self.current_transport = 'polling'
+        self.base_url += '&sid=' + self.sid
+
+        self.state = 'connected'
+        client.connected_clients.append(self)
+        await self._trigger_event('connect', run_async=False)
+
+        for pkt in p.packets[1:]:
+            await self._receive_packet(pkt)
+
+        if 'websocket' in self.upgrades and 'websocket' in self.transports:
+            # attempt to upgrade to websocket
+            if await self._connect_websocket(url, headers, engineio_path):
+                # upgrade to websocket succeeded, we're done here
+                return
+
+        self.write_loop_task = self.start_background_task(self._write_loop)
+        self.read_loop_task = self.start_background_task(
+            self._read_loop_polling)
+
+    async def _connect_websocket(self, url, headers, engineio_path):
+        """Establish or upgrade to a WebSocket connection with the server."""
+        if aiohttp is None:  # pragma: no cover
+            self.logger.error('aiohttp package not installed')
+            return False
+        websocket_url = self._get_engineio_url(url, engineio_path,
+                                               'websocket')
+        if self.sid:
+            self.logger.info(
+                'Attempting WebSocket upgrade to ' + websocket_url)
+            upgrade = True
+            websocket_url += '&sid=' + self.sid
+        else:
+            upgrade = False
+            self.base_url = websocket_url
+            self.logger.info(
+                'Attempting WebSocket connection to ' + websocket_url)
+
+        if self.http is None or self.http.closed:  # pragma: no cover
+            self.http = aiohttp.ClientSession()
+
+        # extract any new cookies passed in a header so that they can also be
+        # sent the the WebSocket route
+        cookies = {}
+        for header, value in headers.items():
+            if header.lower() == 'cookie':
+                cookies = dict(
+                    [cookie.split('=', 1) for cookie in value.split('; ')])
+                del headers[header]
+                break
+        self.http.cookie_jar.update_cookies(cookies)
+
+        try:
+            if not self.ssl_verify:
+                ssl_context = ssl.create_default_context()
+                ssl_context.check_hostname = False
+                ssl_context.verify_mode = ssl.CERT_NONE
+                ws = await self.http.ws_connect(
+                    websocket_url + self._get_url_timestamp(),
+                    headers=headers, ssl=ssl_context)
+            else:
+                ws = await self.http.ws_connect(
+                    websocket_url + self._get_url_timestamp(),
+                    headers=headers)
+        except (aiohttp.client_exceptions.WSServerHandshakeError,
+                aiohttp.client_exceptions.ServerConnectionError,
+                aiohttp.client_exceptions.ClientConnectionError):
+            if upgrade:
+                self.logger.warning(
+                    'WebSocket upgrade failed: connection error')
+                return False
+            else:
+                raise exceptions.ConnectionError('Connection error')
+        if upgrade:
+            p = packet.Packet(packet.PING, data='probe').encode()
+            try:
+                await ws.send_str(p)
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected send exception: %s',
+                    str(e))
+                return False
+            try:
+                p = (await ws.receive()).data
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected recv exception: %s',
+                    str(e))
+                return False
+            pkt = packet.Packet(encoded_packet=p)
+            if pkt.packet_type != packet.PONG or pkt.data != 'probe':
+                self.logger.warning(
+                    'WebSocket upgrade failed: no PONG packet')
+                return False
+            p = packet.Packet(packet.UPGRADE).encode()
+            try:
+                await ws.send_str(p)
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected send exception: %s',
+                    str(e))
+                return False
+            self.current_transport = 'websocket'
+            self.logger.info('WebSocket upgrade was successful')
+        else:
+            try:
+                p = (await ws.receive()).data
+            except Exception as e:  # pragma: no cover
+                raise exceptions.ConnectionError(
+                    'Unexpected recv exception: ' + str(e))
+            open_packet = packet.Packet(encoded_packet=p)
+            if open_packet.packet_type != packet.OPEN:
+                raise exceptions.ConnectionError('no OPEN packet')
+            self.logger.info(
+                'WebSocket connection accepted with ' + str(open_packet.data))
+            self.sid = open_packet.data['sid']
+            self.upgrades = open_packet.data['upgrades']
+            self.ping_interval = int(open_packet.data['pingInterval']) / 1000.0
+            self.ping_timeout = int(open_packet.data['pingTimeout']) / 1000.0
+            self.current_transport = 'websocket'
+
+            self.state = 'connected'
+            client.connected_clients.append(self)
+            await self._trigger_event('connect', run_async=False)
+
+        self.ws = ws
+        self.write_loop_task = self.start_background_task(self._write_loop)
+        self.read_loop_task = self.start_background_task(
+            self._read_loop_websocket)
+        return True
+
+    async def _receive_packet(self, pkt):
+        """Handle incoming packets from the server."""
+        packet_name = packet.packet_names[pkt.packet_type] \
+            if pkt.packet_type < len(packet.packet_names) else 'UNKNOWN'
+        self.logger.info(
+            'Received packet %s data %s', packet_name,
+            pkt.data if not isinstance(pkt.data, bytes) else '<binary>')
+        if pkt.packet_type == packet.MESSAGE:
+            await self._trigger_event('message', pkt.data, run_async=True)
+        elif pkt.packet_type == packet.PING:
+            await self._send_packet(packet.Packet(packet.PONG, pkt.data))
+        elif pkt.packet_type == packet.CLOSE:
+            await self.disconnect(abort=True)
+        elif pkt.packet_type == packet.NOOP:
+            pass
+        else:
+            self.logger.error('Received unexpected packet of type %s',
+                              pkt.packet_type)
+
+    async def _send_packet(self, pkt):
+        """Queue a packet to be sent to the server."""
+        if self.state != 'connected':
+            return
+        await self.queue.put(pkt)
+        self.logger.info(
+            'Sending packet %s data %s',
+            packet.packet_names[pkt.packet_type],
+            pkt.data if not isinstance(pkt.data, bytes) else '<binary>')
+
+    async def _send_request(
+            self, method, url, headers=None, body=None,
+            timeout=None):  # pragma: no cover
+        if self.http is None or self.http.closed:
+            self.http = aiohttp.ClientSession()
+        http_method = getattr(self.http, method.lower())
+
+        try:
+            if not self.ssl_verify:
+                return await http_method(
+                    url, headers=headers, data=body,
+                    timeout=aiohttp.ClientTimeout(total=timeout), ssl=False)
+            else:
+                return await http_method(
+                    url, headers=headers, data=body,
+                    timeout=aiohttp.ClientTimeout(total=timeout))
+
+        except (aiohttp.ClientError, asyncio.TimeoutError) as exc:
+            self.logger.info('HTTP %s request to %s failed with error %s.',
+                             method, url, exc)
+
+    async def _trigger_event(self, event, *args, **kwargs):
+        """Invoke an event handler."""
+        run_async = kwargs.pop('run_async', False)
+        ret = None
+        if event in self.handlers:
+            if asyncio.iscoroutinefunction(self.handlers[event]) is True:
+                if run_async:
+                    return self.start_background_task(self.handlers[event],
+                                                      *args)
+                else:
+                    try:
+                        ret = await self.handlers[event](*args)
+                    except asyncio.CancelledError:  # pragma: no cover
+                        pass
+                    except:
+                        self.logger.exception(event + ' async handler error')
+                        if event == 'connect':
+                            # if connect handler raised error we reject the
+                            # connection
+                            return False
+            else:
+                if run_async:
+                    async def async_handler():
+                        return self.handlers[event](*args)
+
+                    return self.start_background_task(async_handler)
+                else:
+                    try:
+                        ret = self.handlers[event](*args)
+                    except:
+                        self.logger.exception(event + ' handler error')
+                        if event == 'connect':
+                            # if connect handler raised error we reject the
+                            # connection
+                            return False
+        return ret
+
+    async def _read_loop_polling(self):
+        """Read packets by polling the Engine.IO server."""
+        while self.state == 'connected':
+            self.logger.info(
+                'Sending polling GET request to ' + self.base_url)
+            r = await self._send_request(
+                'GET', self.base_url + self._get_url_timestamp(),
+                timeout=max(self.ping_interval, self.ping_timeout) + 5)
+            if r is None:
+                self.logger.warning(
+                    'Connection refused by the server, aborting')
+                await self.queue.put(None)
+                break
+            if r.status < 200 or r.status >= 300:
+                self.logger.warning('Unexpected status code %s in server '
+                                    'response, aborting', r.status)
+                await self.queue.put(None)
+                break
+            try:
+                p = payload.Payload(encoded_payload=(await r.read()).decode(
+                    'utf-8'))
+            except ValueError:
+                self.logger.warning(
+                    'Unexpected packet from server, aborting')
+                await self.queue.put(None)
+                break
+            for pkt in p.packets:
+                await self._receive_packet(pkt)
+
+        self.logger.info('Waiting for write loop task to end')
+        await self.write_loop_task
+        if self.state == 'connected':
+            await self._trigger_event('disconnect', run_async=False)
+            try:
+                client.connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+            self._reset()
+        self.logger.info('Exiting read loop task')
+
+    async def _read_loop_websocket(self):
+        """Read packets from the Engine.IO WebSocket connection."""
+        while self.state == 'connected':
+            p = None
+            try:
+                p = await asyncio.wait_for(
+                    self.ws.receive(),
+                    timeout=self.ping_interval + self.ping_timeout)
+                p = p.data
+                if p is None:  # pragma: no cover
+                    break  # the connection is broken
+            except asyncio.TimeoutError:
+                self.logger.warning(
+                    'Server has stopped communicating, aborting')
+                await self.queue.put(None)
+                break
+            except aiohttp.client_exceptions.ServerDisconnectedError:
+                self.logger.info(
+                    'Read loop: WebSocket connection was closed, aborting')
+                await self.queue.put(None)
+                break
+            except Exception as e:
+                self.logger.info(
+                    'Unexpected error receiving packet: "%s", aborting',
+                    str(e))
+                await self.queue.put(None)
+                break
+            try:
+                pkt = packet.Packet(encoded_packet=p)
+            except Exception as e:  # pragma: no cover
+                self.logger.info(
+                    'Unexpected error decoding packet: "%s", aborting', str(e))
+                await self.queue.put(None)
+                break
+            await self._receive_packet(pkt)
+
+        self.logger.info('Waiting for write loop task to end')
+        await self.write_loop_task
+        if self.state == 'connected':
+            await self._trigger_event('disconnect', run_async=False)
+            try:
+                client.connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+            self._reset()
+        self.logger.info('Exiting read loop task')
+
+    async def _write_loop(self):
+        """This background task sends packages to the server as they are
+        pushed to the send queue.
+        """
+        while self.state == 'connected':
+            # to simplify the timeout handling, use the maximum of the
+            # ping interval and ping timeout as timeout, with an extra 5
+            # seconds grace period
+            timeout = max(self.ping_interval, self.ping_timeout) + 5
+            packets = None
+            try:
+                packets = [await asyncio.wait_for(self.queue.get(), timeout)]
+            except (self.queue.Empty, asyncio.TimeoutError,
+                    asyncio.CancelledError):
+                self.logger.error('packet queue is empty, aborting')
+                break
+            if packets == [None]:
+                self.queue.task_done()
+                packets = []
+            else:
+                while True:
+                    try:
+                        packets.append(self.queue.get_nowait())
+                    except self.queue.Empty:
+                        break
+                    if packets[-1] is None:
+                        packets = packets[:-1]
+                        self.queue.task_done()
+                        break
+            if not packets:
+                # empty packet list returned -> connection closed
+                break
+            if self.current_transport == 'polling':
+                p = payload.Payload(packets=packets)
+                r = await self._send_request(
+                    'POST', self.base_url, body=p.encode(),
+                    headers={'Content-Type': 'application/octet-stream'},
+                    timeout=self.request_timeout)
+                for pkt in packets:
+                    self.queue.task_done()
+                if r is None:
+                    self.logger.warning(
+                        'Connection refused by the server, aborting')
+                    break
+                if r.status < 200 or r.status >= 300:
+                    self.logger.warning('Unexpected status code %s in server '
+                                        'response, aborting', r.status)
+                    self._reset()
+                    break
+            else:
+                # websocket
+                try:
+                    for pkt in packets:
+                        if pkt.binary:
+                            await self.ws.send_bytes(pkt.encode())
+                        else:
+                            await self.ws.send_str(pkt.encode())
+                        self.queue.task_done()
+                except (aiohttp.client_exceptions.ServerDisconnectedError,
+                        BrokenPipeError, OSError):
+                    self.logger.info(
+                        'Write loop: WebSocket connection was closed, '
+                        'aborting')
+                    break
+        self.logger.info('Exiting write loop task')
--- a/Show More
+++ b/Show More