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Merge pull request #84 from Sakimori/redacted

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website branch is... done. we think.
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Sakimori 2020-12-31 14:51:36 -05:00 committed by GitHub
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268 changed files with 65645 additions and 147 deletions
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2
README.md
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@ -1,7 +1,7 @@
# matteo-the-prestige
# simsim discord bot
blaseball, blaseball, is back! in an unofficial capacity.
blaseball, blaseball, is back! in an unofficial capacity. this is completely unaffiliated with the game band
custom players, custom teams, custom leagues (that last one is coming soon™) all in discord!

22
games.py
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@ -107,11 +107,11 @@ class team(object):
self.slogan = None
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
@ -149,6 +149,7 @@ 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:
@ -175,9 +176,12 @@ 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"] = ""
@ -530,6 +534,16 @@ 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()

129
main_controller.py Normal file
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@ -0,0 +1,129 @@
import asyncio, time, datetime, games, json, threading
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'
socketio = SocketIO(app)
@app.route('/')
def index():
return render_template("index.html")
@app.route("/gotoboop")
def get_game_states():
return states_to_send
@socketio.on("recieved")
def handle_new_conn(data):
socketio.emit("states_update", last_update, room=request.sid)
thread2 = threading.Thread(target=socketio.run,args=(app,))
thread2.start()
master_games_dic = {} #key timestamp : (game game, {} state)
last_update = {}
def update_loop():
while True:
states_to_send = {}
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()
print(discrim_string)
state["leagueoruser"] = discrim_string
state["display_inning"] = this_game.inning #games need to be initialized with the following keys in state:
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
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
states_to_send[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)
state["end_delay"] -= 1
else:
this_game.gamestate_update_full()
state["update_pause"] -= 1
global last_update
last_update = states_to_send
socketio.emit("states_update", states_to_send)
time.sleep(6)

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matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/INSTALLER Normal file
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@ -0,0 +1 @@
pip

28
matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/LICENSE.rst Normal file
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@ -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.

137
matteo_env/Lib/site-packages/Flask-1.1.2.dist-info/METADATA Normal file
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@ -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/

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[console_scripts]
flask = flask.cli:main

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flask

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matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/INSTALLER Normal file
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pip

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matteo_env/Lib/site-packages/Flask_SocketIO-5.0.1.dist-info/LICENSE Normal file
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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.

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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.

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flask_socketio

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pip

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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.

106
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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

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[babel.extractors]
jinja2 = jinja2.ext:babel_extract [i18n]

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jinja2

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pip

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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.

105
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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

15
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markupsafe

1
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pip

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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.

128
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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/

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Wheel-Version: 1.0
Generator: bdist_wheel (0.34.2)
Root-Is-Purelib: true
Tag: py2-none-any
Tag: py3-none-any

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werkzeug

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pip

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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.

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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
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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]_

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# -*- 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 →
#==============================================================================

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# -*- 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 →
#==============================================================================

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# -*- 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 →
#==============================================================================

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# -*- 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 →
#==============================================================================

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# -*- 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()

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# -*- 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)

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# -*- 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.
"""

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# -*- 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 →
#==============================================================================

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# -*- 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 →
#==============================================================================

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# -*- 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))

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# -*- 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 →
#==============================================================================

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# -*- 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()

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# -*- 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 →
#==============================================================================

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# -*- 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>
#==============================================================================

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# -*- 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

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# coding: utf-8
# file generated by setuptools_scm
# don't change, don't track in version control
version = '0.21.2'

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# -*- 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'

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pip

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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.

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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

40
matteo_env/Lib/site-packages/click-7.1.2.dist-info/RECORD Normal file
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click/__init__.py,sha256=FkyGDQ-cbiQxP_lxgUspyFYS48f2S_pTcfKPz-d_RMo,2463
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Wheel-Version: 1.0
Generator: bdist_wheel (0.34.2)
Root-Is-Purelib: true
Tag: py2-none-any
Tag: py3-none-any

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click

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"""
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"

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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

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# 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,
}

657
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# -*- 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

37
matteo_env/Lib/site-packages/click/_textwrap.py Normal file
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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)

131
matteo_env/Lib/site-packages/click/_unicodefun.py Normal file
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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)
)

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# -*- 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)

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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

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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

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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

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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

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# -*- 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)

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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)

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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

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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()

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matteo_env/Lib/site-packages/click/utils.py Normal file
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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)

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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'],

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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,
}

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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,
}

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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,
}

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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,
}

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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,
}

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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,
}

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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,
}

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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,
}

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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')

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import asyncio
import urllib
from . import exceptions
from . import packet
from . import server
from . import asyncio_socket
class AsyncServer(server.Server):
"""An Engine.IO server for asyncio.
This class implements a fully compliant Engine.IO web server with support
for websocket and long-polling transports, compatible with the asyncio
framework on Python 3.5 or newer.
:param async_mode: The asynchronous model to use. See the Deployment
section in the documentation for a description of the
available options. Valid async modes are "aiohttp",
"sanic", "tornado" and "asgi". If this argument is not
given, "aiohttp" is tried first, followed by "sanic",
"tornado", and finally "asgi". The first async mode that
has all its dependencies installed is the one that is
chosen.
:param ping_interval: The interval in seconds at which the server pings
the client. The default is 25 seconds. For advanced
control, a two element tuple can be given, where
the first number is the ping interval and the second
is a grace period added by the server.
:param ping_timeout: The time in seconds that the client waits for the
server to respond before disconnecting. The default
is 5 seconds.
:param max_http_buffer_size: The maximum size of a message when using the
polling transport. The default is 1,000,000
bytes.
:param allow_upgrades: Whether to allow transport upgrades or not.
:param http_compression: Whether to compress packages when using the
polling transport.
:param compression_threshold: Only compress messages when their byte size
is greater than this value.
:param cookie: If set to a string, it is the name of the HTTP cookie the
server sends back tot he client containing the client
session id. If set to a dictionary, the ``'name'`` key
contains the cookie name and other keys define cookie
attributes, where the value of each attribute can be a
string, a callable with no arguments, or a boolean. If set
to ``None`` (the default), a cookie is not sent to the
client.
:param cors_allowed_origins: Origin or list of origins that are allowed to
connect to this server. Only the same origin
is allowed by default. Set this argument to
``'*'`` to allow all origins, or to ``[]`` to
disable CORS handling.
:param cors_credentials: Whether credentials (cookies, authentication) are
allowed in requests to this server.
:param logger: To enable logging set to ``True`` or pass a logger object to
use. To disable logging set to ``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 async_handlers: If set to ``True``, run message event handlers in
non-blocking threads. To run handlers synchronously,
set to ``False``. The default is ``True``.
:param kwargs: Reserved for future extensions, any additional parameters
given as keyword arguments will be silently ignored.
"""
def is_asyncio_based(self):
return True
def async_modes(self):
return ['aiohttp', 'sanic', 'tornado', 'asgi']
def attach(self, app, engineio_path='engine.io'):
"""Attach the Engine.IO server to an application."""
engineio_path = engineio_path.strip('/')
self._async['create_route'](app, self, '/{}/'.format(engineio_path))
async def send(self, sid, data):
"""Send a message to a client.
:param sid: The session id of the recipient 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.
"""
try:
socket = self._get_socket(sid)
except KeyError:
# the socket is not available
self.logger.warning('Cannot send to sid %s', sid)
return
await socket.send(packet.Packet(packet.MESSAGE, data=data))
async def get_session(self, sid):
"""Return the user session for a client.
:param sid: The session id of the client.
The return value is a dictionary. Modifications made to this
dictionary are not guaranteed to be preserved. If you want to modify
the user session, use the ``session`` context manager instead.
"""
socket = self._get_socket(sid)
return socket.session
async def save_session(self, sid, session):
"""Store the user session for a client.
:param sid: The session id of the client.
:param session: The session dictionary.
"""
socket = self._get_socket(sid)
socket.session = session
def session(self, sid):
"""Return the user session for a client with context manager syntax.
:param sid: The session id of the client.
This is a context manager that returns the user session dictionary for
the client. Any changes that are made to this dictionary inside the
context manager block are saved back to the session. Example usage::
@eio.on('connect')
def on_connect(sid, environ):
username = authenticate_user(environ)
if not username:
return False
with eio.session(sid) as session:
session['username'] = username
@eio.on('message')
def on_message(sid, msg):
async with eio.session(sid) as session:
print('received message from ', session['username'])
"""
class _session_context_manager(object):
def __init__(self, server, sid):
self.server = server
self.sid = sid
self.session = None
async def __aenter__(self):
self.session = await self.server.get_session(sid)
return self.session
async def __aexit__(self, *args):
await self.server.save_session(sid, self.session)
return _session_context_manager(self, sid)
async def disconnect(self, sid=None):
"""Disconnect a client.
:param sid: The session id of the client to close. If this parameter
is not given, then all clients are closed.
Note: this method is a coroutine.
"""
if sid is not None:
try:
socket = self._get_socket(sid)
except KeyError: # pragma: no cover
# the socket was already closed or gone
pass
else:
await socket.close()
if sid in self.sockets: # pragma: no cover
del self.sockets[sid]
else:
await asyncio.wait([client.close()
for client in self.sockets.values()])
self.sockets = {}
async def handle_request(self, *args, **kwargs):
"""Handle an HTTP request from the client.
This is the entry point of the Engine.IO application. This function
returns the HTTP response to deliver to the client.
Note: this method is a coroutine.
"""
translate_request = self._async['translate_request']
if asyncio.iscoroutinefunction(translate_request):
environ = await translate_request(*args, **kwargs)
else:
environ = translate_request(*args, **kwargs)
if self.cors_allowed_origins != []:
# Validate the origin header if present
# This is important for WebSocket more than for HTTP, since
# browsers only apply CORS controls to HTTP.
origin = environ.get('HTTP_ORIGIN')
if origin:
allowed_origins = self._cors_allowed_origins(environ)
if allowed_origins is not None and origin not in \
allowed_origins:
self._log_error_once(
origin + ' is not an accepted origin.', 'bad-origin')
return await self._make_response(
self._bad_request(
origin + ' is not an accepted origin.'),
environ)
method = environ['REQUEST_METHOD']
query = urllib.parse.parse_qs(environ.get('QUERY_STRING', ''))
sid = query['sid'][0] if 'sid' in query else None
jsonp = False
jsonp_index = None
# make sure the client speaks a compatible Engine.IO version
sid = query['sid'][0] if 'sid' in query else None
if sid is None and query.get('EIO') != ['4']:
self._log_error_once(
'The client is using an unsupported version of the Socket.IO '
'or Engine.IO protocols', 'bad-version'
)
return await self._make_response(self._bad_request(
'The client is using an unsupported version of the Socket.IO '
'or Engine.IO protocols'
), environ)
if 'j' in query:
jsonp = True
try:
jsonp_index = int(query['j'][0])
except (ValueError, KeyError, IndexError):
# Invalid JSONP index number
pass
if jsonp and jsonp_index is None:
self._log_error_once('Invalid JSONP index number',
'bad-jsonp-index')
r = self._bad_request('Invalid JSONP index number')
elif method == 'GET':
if sid is None:
transport = query.get('transport', ['polling'])[0]
# transport must be one of 'polling' or 'websocket'.
# if 'websocket', the HTTP_UPGRADE header must match.
upgrade_header = environ.get('HTTP_UPGRADE').lower() \
if 'HTTP_UPGRADE' in environ else None
if transport == 'polling' \
or transport == upgrade_header == 'websocket':
r = await self._handle_connect(environ, transport,
jsonp_index)
else:
self._log_error_once('Invalid transport ' + transport,
'bad-transport')
r = self._bad_request('Invalid transport ' + transport)
else:
if sid not in self.sockets:
self._log_error_once('Invalid session ' + sid, 'bad-sid')
r = self._bad_request('Invalid session ' + sid)
else:
socket = self._get_socket(sid)
try:
packets = await socket.handle_get_request(environ)
if isinstance(packets, list):
r = self._ok(packets, jsonp_index=jsonp_index)
else:
r = packets
except exceptions.EngineIOError:
if sid in self.sockets: # pragma: no cover
await self.disconnect(sid)
r = self._bad_request()
if sid in self.sockets and self.sockets[sid].closed:
del self.sockets[sid]
elif method == 'POST':
if sid is None or sid not in self.sockets:
self._log_error_once('Invalid session ' + sid, 'bad-sid')
r = self._bad_request('Invalid session ' + sid)
else:
socket = self._get_socket(sid)
try:
await socket.handle_post_request(environ)
r = self._ok(jsonp_index=jsonp_index)
except exceptions.EngineIOError:
if sid in self.sockets: # pragma: no cover
await self.disconnect(sid)
r = self._bad_request()
except: # pragma: no cover
# for any other unexpected errors, we log the error
# and keep going
self.logger.exception('post request handler error')
r = self._ok(jsonp_index=jsonp_index)
elif method == 'OPTIONS':
r = self._ok()
else:
self.logger.warning('Method %s not supported', method)
r = self._method_not_found()
if not isinstance(r, dict):
return r
if self.http_compression and \
len(r['response']) >= self.compression_threshold:
encodings = [e.split(';')[0].strip() for e in
environ.get('HTTP_ACCEPT_ENCODING', '').split(',')]
for encoding in encodings:
if encoding in self.compression_methods:
r['response'] = \
getattr(self, '_' + encoding)(r['response'])
r['headers'] += [('Content-Encoding', encoding)]
break
return await self._make_response(r, environ)
def start_background_task(self, target, *args, **kwargs):
"""Start a background task using the appropriate async model.
This is a utility function that applications can use to start a
background task using the method that is compatible with the
selected async mode.
:param target: the target function to execute.
:param args: arguments to pass to the function.
:param kwargs: keyword arguments to pass to the function.
The return value is a ``asyncio.Task`` object.
"""
return asyncio.ensure_future(target(*args, **kwargs))
async def sleep(self, seconds=0):
"""Sleep for the requested amount of time using the appropriate async
model.
This is a utility function that applications can use to put a task to
sleep without having to worry about using the correct call for the
selected async mode.
Note: this method is a coroutine.
"""
return await asyncio.sleep(seconds)
def create_queue(self, *args, **kwargs):
"""Create a queue object using the appropriate async model.
This is a utility function that applications can use to create a queue
without having to worry about using the correct call for the selected
async mode. For asyncio based async modes, this returns an instance of
``asyncio.Queue``.
"""
return asyncio.Queue(*args, **kwargs)
def get_queue_empty_exception(self):
"""Return the queue empty exception for the appropriate async model.
This is a utility function that applications can use to work with a
queue without having to worry about using the correct call for the
selected async mode. For asyncio based async modes, this returns an
instance of ``asyncio.QueueEmpty``.
"""
return asyncio.QueueEmpty
def create_event(self, *args, **kwargs):
"""Create an event object using the appropriate async model.
This is a utility function that applications can use to create an
event without having to worry about using the correct call for the
selected async mode. For asyncio based async modes, this returns
an instance of ``asyncio.Event``.
"""
return asyncio.Event(*args, **kwargs)
async def _make_response(self, response_dict, environ):
cors_headers = self._cors_headers(environ)
make_response = self._async['make_response']
if asyncio.iscoroutinefunction(make_response):
response = await make_response(
response_dict['status'],
response_dict['headers'] + cors_headers,
response_dict['response'], environ)
else:
response = make_response(
response_dict['status'],
response_dict['headers'] + cors_headers,
response_dict['response'], environ)
return response
async def _handle_connect(self, environ, transport, jsonp_index=None):
"""Handle a client connection request."""
if self.start_service_task:
# start the service task to monitor connected clients
self.start_service_task = False
self.start_background_task(self._service_task)
sid = self.generate_id()
s = asyncio_socket.AsyncSocket(self, sid)
self.sockets[sid] = s
pkt = packet.Packet(
packet.OPEN, {'sid': sid,
'upgrades': self._upgrades(sid, transport),
'pingTimeout': int(self.ping_timeout * 1000),
'pingInterval': int(self.ping_interval * 1000)})
await s.send(pkt)
s.schedule_ping()
ret = await self._trigger_event('connect', sid, environ,
run_async=False)
if ret is not None and ret is not True:
del self.sockets[sid]
self.logger.warning('Application rejected connection')
return self._unauthorized(ret or None)
if transport == 'websocket':
ret = await s.handle_get_request(environ)
if s.closed and sid in self.sockets:
# websocket connection ended, so we are done
del self.sockets[sid]
return ret
else:
s.connected = True
headers = None
if self.cookie:
if isinstance(self.cookie, dict):
headers = [(
'Set-Cookie',
self._generate_sid_cookie(sid, self.cookie)
)]
else:
headers = [(
'Set-Cookie',
self._generate_sid_cookie(sid, {
'name': self.cookie, 'path': '/', 'SameSite': 'Lax'
})
)]
try:
return self._ok(await s.poll(), headers=headers,
jsonp_index=jsonp_index)
except exceptions.QueueEmpty:
return self._bad_request()
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 _service_task(self): # pragma: no cover
"""Monitor connected clients and clean up those that time out."""
while True:
if len(self.sockets) == 0:
# nothing to do
await self.sleep(self.ping_timeout)
continue
# go through the entire client list in a ping interval cycle
sleep_interval = self.ping_timeout / len(self.sockets)
try:
# iterate over the current clients
for socket in self.sockets.copy().values():
if not socket.closing and not socket.closed:
await socket.check_ping_timeout()
await self.sleep(sleep_interval)
except (
SystemExit,
KeyboardInterrupt,
asyncio.CancelledError,
GeneratorExit,
):
self.logger.info('service task canceled')
break
except:
if asyncio.get_event_loop().is_closed():
self.logger.info('event loop is closed, exiting service '
'task')
break
# an unexpected exception has occurred, log it and continue
self.logger.exception('service task exception')

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import asyncio
import sys
import time
from . import exceptions
from . import packet
from . import payload
from . import socket
class AsyncSocket(socket.Socket):
async def poll(self):
"""Wait for packets to send to the client."""
try:
packets = [await asyncio.wait_for(
self.queue.get(),
self.server.ping_interval + self.server.ping_timeout)]
self.queue.task_done()
except (asyncio.TimeoutError, asyncio.CancelledError):
raise exceptions.QueueEmpty()
if packets == [None]:
return []
while True:
try:
pkt = self.queue.get_nowait()
self.queue.task_done()
if pkt is None:
self.queue.put_nowait(None)
break
packets.append(pkt)
except asyncio.QueueEmpty:
break
return packets
async def receive(self, pkt):
"""Receive packet from the client."""
self.server.logger.info('%s: Received packet %s data %s',
self.sid, packet.packet_names[pkt.packet_type],
pkt.data if not isinstance(pkt.data, bytes)
else '<binary>')
if pkt.packet_type == packet.PONG:
self.schedule_ping()
elif pkt.packet_type == packet.MESSAGE:
await self.server._trigger_event(
'message', self.sid, pkt.data,
run_async=self.server.async_handlers)
elif pkt.packet_type == packet.UPGRADE:
await self.send(packet.Packet(packet.NOOP))
elif pkt.packet_type == packet.CLOSE:
await self.close(wait=False, abort=True)
else:
raise exceptions.UnknownPacketError()
async def check_ping_timeout(self):
"""Make sure the client is still sending pings."""
if self.closed:
raise exceptions.SocketIsClosedError()
if self.last_ping and \
time.time() - self.last_ping > self.server.ping_timeout:
self.server.logger.info('%s: Client is gone, closing socket',
self.sid)
# Passing abort=False here will cause close() to write a
# CLOSE packet. This has the effect of updating half-open sockets
# to their correct state of disconnected
await self.close(wait=False, abort=False)
return False
return True
async def send(self, pkt):
"""Send a packet to the client."""
if not await self.check_ping_timeout():
return
else:
await self.queue.put(pkt)
self.server.logger.info('%s: Sending packet %s data %s',
self.sid, packet.packet_names[pkt.packet_type],
pkt.data if not isinstance(pkt.data, bytes)
else '<binary>')
async def handle_get_request(self, environ):
"""Handle a long-polling GET request from the client."""
connections = [
s.strip()
for s in environ.get('HTTP_CONNECTION', '').lower().split(',')]
transport = environ.get('HTTP_UPGRADE', '').lower()
if 'upgrade' in connections and transport in self.upgrade_protocols:
self.server.logger.info('%s: Received request to upgrade to %s',
self.sid, transport)
return await getattr(self, '_upgrade_' + transport)(environ)
if self.upgrading or self.upgraded:
# we are upgrading to WebSocket, do not return any more packets
# through the polling endpoint
return [packet.Packet(packet.NOOP)]
try:
packets = await self.poll()
except exceptions.QueueEmpty:
exc = sys.exc_info()
await self.close(wait=False)
raise exc[1].with_traceback(exc[2])
return packets
async def handle_post_request(self, environ):
"""Handle a long-polling POST request from the client."""
length = int(environ.get('CONTENT_LENGTH', '0'))
if length > self.server.max_http_buffer_size:
raise exceptions.ContentTooLongError()
else:
body = (await environ['wsgi.input'].read(length)).decode('utf-8')
p = payload.Payload(encoded_payload=body)
for pkt in p.packets:
await self.receive(pkt)
async def close(self, wait=True, abort=False):
"""Close the socket connection."""
if not self.closed and not self.closing:
self.closing = True
await self.server._trigger_event('disconnect', self.sid)
if not abort:
await self.send(packet.Packet(packet.CLOSE))
self.closed = True
if wait:
await self.queue.join()
def schedule_ping(self):
async def send_ping():
self.last_ping = None
await asyncio.sleep(self.server.ping_interval)
if not self.closing and not self.closed:
self.last_ping = time.time()
await self.send(packet.Packet(packet.PING))
self.server.start_background_task(send_ping)
async def _upgrade_websocket(self, environ):
"""Upgrade the connection from polling to websocket."""
if self.upgraded:
raise IOError('Socket has been upgraded already')
if self.server._async['websocket'] is None:
# the selected async mode does not support websocket
return self.server._bad_request()
ws = self.server._async['websocket'](self._websocket_handler)
return await ws(environ)
async def _websocket_handler(self, ws):
"""Engine.IO handler for websocket transport."""
if self.connected:
# the socket was already connected, so this is an upgrade
self.upgrading = True # hold packet sends during the upgrade
try:
pkt = await ws.wait()
except IOError: # pragma: no cover
return
decoded_pkt = packet.Packet(encoded_packet=pkt)
if decoded_pkt.packet_type != packet.PING or \
decoded_pkt.data != 'probe':
self.server.logger.info(
'%s: Failed websocket upgrade, no PING packet', self.sid)
self.upgrading = False
return
await ws.send(packet.Packet(packet.PONG, data='probe').encode())
await self.queue.put(packet.Packet(packet.NOOP)) # end poll
try:
pkt = await ws.wait()
except IOError: # pragma: no cover
self.upgrading = False
return
decoded_pkt = packet.Packet(encoded_packet=pkt)
if decoded_pkt.packet_type != packet.UPGRADE:
self.upgraded = False
self.server.logger.info(
('%s: Failed websocket upgrade, expected UPGRADE packet, '
'received %s instead.'),
self.sid, pkt)
self.upgrading = False
return
self.upgraded = True
self.upgrading = False
else:
self.connected = True
self.upgraded = True
# start separate writer thread
async def writer():
while True:
packets = None
try:
packets = await self.poll()
except exceptions.QueueEmpty:
break
if not packets:
# empty packet list returned -> connection closed
break
try:
for pkt in packets:
await ws.send(pkt.encode())
except:
break
writer_task = asyncio.ensure_future(writer())
self.server.logger.info(
'%s: Upgrade to websocket successful', self.sid)
while True:
p = None
wait_task = asyncio.ensure_future(ws.wait())
try:
p = await asyncio.wait_for(
wait_task,
self.server.ping_interval + self.server.ping_timeout)
except asyncio.CancelledError: # pragma: no cover
# there is a bug (https://bugs.python.org/issue30508) in
# asyncio that causes a "Task exception never retrieved" error
# to appear when wait_task raises an exception before it gets
# cancelled. Calling wait_task.exception() prevents the error
# from being issued in Python 3.6, but causes other errors in
# other versions, so we run it with all errors suppressed and
# hope for the best.
try:
wait_task.exception()
except:
pass
break
except:
break
if p is None:
# connection closed by client
break
pkt = packet.Packet(encoded_packet=p)
try:
await self.receive(pkt)
except exceptions.UnknownPacketError: # pragma: no cover
pass
except exceptions.SocketIsClosedError: # pragma: no cover
self.server.logger.info('Receive error -- socket is closed')
break
except: # pragma: no cover
# if we get an unexpected exception we log the error and exit
# the connection properly
self.server.logger.exception('Unknown receive error')
await self.queue.put(None) # unlock the writer task so it can exit
await asyncio.wait_for(writer_task, timeout=None)
await self.close(wait=False, abort=True)

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matteo_env/Lib/site-packages/engineio/client.py Normal file
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from base64 import b64encode
from json import JSONDecodeError
import logging
try:
import queue
except ImportError: # pragma: no cover
import Queue as queue
import signal
import ssl
import threading
import time
import urllib
try:
import requests
except ImportError: # pragma: no cover
requests = None
try:
import websocket
except ImportError: # pragma: no cover
websocket = None
from . import exceptions
from . import packet
from . import payload
default_logger = logging.getLogger('engineio.client')
connected_clients = []
def signal_handler(sig, frame):
"""SIGINT handler.
Disconnect all active clients and then invoke the original signal handler.
"""
for client in connected_clients[:]:
if not client.is_asyncio_based():
client.disconnect()
if callable(original_signal_handler):
return original_signal_handler(sig, frame)
else: # pragma: no cover
# Handle case where no original SIGINT handler was present.
return signal.default_int_handler(sig, frame)
original_signal_handler = None
class Client(object):
"""An Engine.IO client.
This class implements a fully compliant Engine.IO web client with support
for websocket and long-polling transports.
: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 ``requests.Session`` 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``.
"""
event_names = ['connect', 'disconnect', 'message']
def __init__(self,
logger=False,
json=None,
request_timeout=5,
http_session=None,
ssl_verify=True):
global original_signal_handler
if original_signal_handler is None and \
threading.current_thread() == threading.main_thread():
original_signal_handler = signal.signal(signal.SIGINT,
signal_handler)
self.handlers = {}
self.base_url = None
self.transports = None
self.current_transport = None
self.sid = None
self.upgrades = None
self.ping_interval = None
self.ping_timeout = None
self.http = http_session
self.ws = None
self.read_loop_task = None
self.write_loop_task = None
self.queue = None
self.state = 'disconnected'
self.ssl_verify = ssl_verify
if json is not None:
packet.Packet.json = json
if not isinstance(logger, bool):
self.logger = logger
else:
self.logger = default_logger
if self.logger.level == logging.NOTSET:
if logger:
self.logger.setLevel(logging.INFO)
else:
self.logger.setLevel(logging.ERROR)
self.logger.addHandler(logging.StreamHandler())
self.request_timeout = request_timeout
def is_asyncio_based(self):
return False
def on(self, event, handler=None):
"""Register an event handler.
:param event: The event name. Can be ``'connect'``, ``'message'`` or
``'disconnect'``.
:param handler: The function that should be invoked to handle the
event. When this parameter is not given, the method
acts as a decorator for the handler function.
Example usage::
# as a decorator:
@eio.on('connect')
def connect_handler():
print('Connection request')
# as a method:
def message_handler(msg):
print('Received message: ', msg)
eio.send('response')
eio.on('message', message_handler)
"""
if event not in self.event_names:
raise ValueError('Invalid event')
def set_handler(handler):
self.handlers[event] = handler
return handler
if handler is None:
return set_handler
set_handler(handler)
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.
Example usage::
eio = engineio.Client()
eio.connect('http://localhost:5000')
"""
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 getattr(self, '_connect_' + self.transports[0])(
url, headers or {}, engineio_path)
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.
"""
if self.read_loop_task:
self.read_loop_task.join()
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.
"""
self._send_packet(packet.Packet(packet.MESSAGE, data=data))
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.
"""
if self.state == 'connected':
self._send_packet(packet.Packet(packet.CLOSE))
self.queue.put(None)
self.state = 'disconnecting'
self._trigger_event('disconnect', run_async=False)
if self.current_transport == 'websocket':
self.ws.close()
if not abort:
self.read_loop_task.join()
self.state = 'disconnected'
try:
connected_clients.remove(self)
except ValueError: # pragma: no cover
pass
self._reset()
def transport(self):
"""Return the name of the transport currently in use.
The possible values returned by this function are ``'polling'`` and
``'websocket'``.
"""
return self.current_transport
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.
"""
th = threading.Thread(target=target, args=args, kwargs=kwargs)
th.start()
return th
def sleep(self, seconds=0):
"""Sleep for the requested amount of time."""
return time.sleep(seconds)
def create_queue(self, *args, **kwargs):
"""Create a queue object."""
q = queue.Queue(*args, **kwargs)
q.Empty = queue.Empty
return q
def create_event(self, *args, **kwargs):
"""Create an event object."""
return threading.Event(*args, **kwargs)
def _reset(self):
self.state = 'disconnected'
self.sid = None
def _connect_polling(self, url, headers, engineio_path):
"""Establish a long-polling connection to the Engine.IO server."""
if requests is None: # pragma: no cover
# not installed
self.logger.error('requests package is not installed -- cannot '
'send 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 = 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_code < 200 or r.status_code >= 300:
self._reset()
try:
arg = r.json()
except JSONDecodeError:
arg = None
raise exceptions.ConnectionError(
'Unexpected status code {} in server response'.format(
r.status_code), arg)
try:
p = payload.Payload(encoded_payload=r.content.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'
connected_clients.append(self)
self._trigger_event('connect', run_async=False)
for pkt in p.packets[1:]:
self._receive_packet(pkt)
if 'websocket' in self.upgrades and 'websocket' in self.transports:
# attempt to upgrade to websocket
if self._connect_websocket(url, headers, engineio_path):
# upgrade to websocket succeeded, we're done here
return
# start background tasks associated with this client
self.write_loop_task = self.start_background_task(self._write_loop)
self.read_loop_task = self.start_background_task(
self._read_loop_polling)
def _connect_websocket(self, url, headers, engineio_path):
"""Establish or upgrade to a WebSocket connection with the server."""
if websocket is None: # pragma: no cover
# not installed
self.logger.warning('websocket-client package not installed, only '
'polling transport is available')
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)
# get cookies and other settings from the long-polling connection
# so that they are preserved when connecting to the WebSocket route
cookies = None
extra_options = {}
if self.http:
# cookies
cookies = '; '.join(["{}={}".format(cookie.name, cookie.value)
for cookie in self.http.cookies])
for header, value in headers.items():
if header.lower() == 'cookie':
if cookies:
cookies += '; '
cookies += value
del headers[header]
break
# auth
if 'Authorization' not in headers and self.http.auth is not None:
if not isinstance(self.http.auth, tuple): # pragma: no cover
raise ValueError('Only basic authentication is supported')
basic_auth = '{}:{}'.format(
self.http.auth[0], self.http.auth[1]).encode('utf-8')
basic_auth = b64encode(basic_auth).decode('utf-8')
headers['Authorization'] = 'Basic ' + basic_auth
# cert
# this can be given as ('certfile', 'keyfile') or just 'certfile'
if isinstance(self.http.cert, tuple):
extra_options['sslopt'] = {
'certfile': self.http.cert[0],
'keyfile': self.http.cert[1]}
elif self.http.cert:
extra_options['sslopt'] = {'certfile': self.http.cert}
# proxies
if self.http.proxies:
proxy_url = None
if websocket_url.startswith('ws://'):
proxy_url = self.http.proxies.get(
'ws', self.http.proxies.get('http'))
else: # wss://
proxy_url = self.http.proxies.get(
'wss', self.http.proxies.get('https'))
if proxy_url:
parsed_url = urllib.parse.urlparse(
proxy_url if '://' in proxy_url
else 'scheme://' + proxy_url)
extra_options['http_proxy_host'] = parsed_url.hostname
extra_options['http_proxy_port'] = parsed_url.port
extra_options['http_proxy_auth'] = (
(parsed_url.username, parsed_url.password)
if parsed_url.username or parsed_url.password
else None)
# verify
if not self.http.verify:
self.ssl_verify = False
if not self.ssl_verify:
extra_options['sslopt'] = {"cert_reqs": ssl.CERT_NONE}
try:
ws = websocket.create_connection(
websocket_url + self._get_url_timestamp(), header=headers,
cookie=cookies, enable_multithread=True, **extra_options)
except (ConnectionError, IOError, websocket.WebSocketException):
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:
ws.send(p)
except Exception as e: # pragma: no cover
self.logger.warning(
'WebSocket upgrade failed: unexpected send exception: %s',
str(e))
return False
try:
p = ws.recv()
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:
ws.send(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 = ws.recv()
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'
connected_clients.append(self)
self._trigger_event('connect', run_async=False)
self.ws = ws
self.ws.settimeout(self.ping_interval + self.ping_timeout)
# start background tasks associated with this client
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
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:
self._trigger_event('message', pkt.data, run_async=True)
elif pkt.packet_type == packet.PING:
self._send_packet(packet.Packet(packet.PONG, pkt.data))
elif pkt.packet_type == packet.CLOSE:
self.disconnect(abort=True)
elif pkt.packet_type == packet.NOOP:
pass
else:
self.logger.error('Received unexpected packet of type %s',
pkt.packet_type)
def _send_packet(self, pkt):
"""Queue a packet to be sent to the server."""
if self.state != 'connected':
return
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>')
def _send_request(
self, method, url, headers=None, body=None,
timeout=None): # pragma: no cover
if self.http is None:
self.http = requests.Session()
try:
return self.http.request(method, url, headers=headers, data=body,
timeout=timeout, verify=self.ssl_verify)
except requests.exceptions.RequestException as exc:
self.logger.info('HTTP %s request to %s failed with error %s.',
method, url, exc)
def _trigger_event(self, event, *args, **kwargs):
"""Invoke an event handler."""
run_async = kwargs.pop('run_async', False)
if event in self.handlers:
if run_async:
return self.start_background_task(self.handlers[event], *args)
else:
try:
return self.handlers[event](*args)
except:
self.logger.exception(event + ' handler error')
def _get_engineio_url(self, url, engineio_path, transport):
"""Generate the Engine.IO connection URL."""
engineio_path = engineio_path.strip('/')
parsed_url = urllib.parse.urlparse(url)
if transport == 'polling':
scheme = 'http'
elif transport == 'websocket':
scheme = 'ws'
else: # pragma: no cover
raise ValueError('invalid transport')
if parsed_url.scheme in ['https', 'wss']:
scheme += 's'
return ('{scheme}://{netloc}/{path}/?{query}'
'{sep}transport={transport}&EIO=4').format(
scheme=scheme, netloc=parsed_url.netloc,
path=engineio_path, query=parsed_url.query,
sep='&' if parsed_url.query else '',
transport=transport)
def _get_url_timestamp(self):
"""Generate the Engine.IO query string timestamp."""
return '&t=' + str(time.time())
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 = 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')
self.queue.put(None)
break
if r.status_code < 200 or r.status_code >= 300:
self.logger.warning('Unexpected status code %s in server '
'response, aborting', r.status_code)
self.queue.put(None)
break
try:
p = payload.Payload(encoded_payload=r.content.decode('utf-8'))
except ValueError:
self.logger.warning(
'Unexpected packet from server, aborting')
self.queue.put(None)
break
for pkt in p.packets:
self._receive_packet(pkt)
self.logger.info('Waiting for write loop task to end')
self.write_loop_task.join()
if self.state == 'connected':
self._trigger_event('disconnect', run_async=False)
try:
connected_clients.remove(self)
except ValueError: # pragma: no cover
pass
self._reset()
self.logger.info('Exiting read loop task')
def _read_loop_websocket(self):
"""Read packets from the Engine.IO WebSocket connection."""
while self.state == 'connected':
p = None
try:
p = self.ws.recv()
except websocket.WebSocketTimeoutException:
self.logger.warning(
'Server has stopped communicating, aborting')
self.queue.put(None)
break
except websocket.WebSocketConnectionClosedException:
self.logger.warning(
'WebSocket connection was closed, aborting')
self.queue.put(None)
break
except Exception as e:
self.logger.info(
'Unexpected error receiving packet: "%s", aborting',
str(e))
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))
self.queue.put(None)
break
self._receive_packet(pkt)
self.logger.info('Waiting for write loop task to end')
self.write_loop_task.join()
if self.state == 'connected':
self._trigger_event('disconnect', run_async=False)
try:
connected_clients.remove(self)
except ValueError: # pragma: no cover
pass
self._reset()
self.logger.info('Exiting read loop task')
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 = [self.queue.get(timeout=timeout)]
except self.queue.Empty:
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(block=False))
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 = 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_code < 200 or r.status_code >= 300:
self.logger.warning('Unexpected status code %s in server '
'response, aborting', r.status_code)
self._reset()
break
else:
# websocket
try:
for pkt in packets:
encoded_packet = pkt.encode()
if pkt.binary:
self.ws.send_binary(encoded_packet)
else:
self.ws.send(encoded_packet)
self.queue.task_done()
except (websocket.WebSocketConnectionClosedException,
BrokenPipeError, OSError):
self.logger.warning(
'WebSocket connection was closed, aborting')
break
self.logger.info('Exiting write loop task')

22
matteo_env/Lib/site-packages/engineio/exceptions.py Normal file
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@ -0,0 +1,22 @@
class EngineIOError(Exception):
pass
class ContentTooLongError(EngineIOError):
pass
class UnknownPacketError(EngineIOError):
pass
class QueueEmpty(EngineIOError):
pass
class SocketIsClosedError(EngineIOError):
pass
class ConnectionError(EngineIOError):
pass

87
matteo_env/Lib/site-packages/engineio/middleware.py Normal file
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@ -0,0 +1,87 @@
import os
from engineio.static_files import get_static_file
class WSGIApp(object):
"""WSGI 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 WSGI application.
:param engineio_app: The Engine.IO server. Must be an instance of the
``engineio.Server`` class.
:param wsgi_app: The WSGI app that receives all other traffic.
:param static_files: A dictionary with static file mapping rules. See the
documentation for details on this argument.
:param engineio_path: The endpoint where the Engine.IO application should
be installed. The default value is appropriate for
most cases.
Example usage::
import engineio
import eventlet
eio = engineio.Server()
app = engineio.WSGIApp(eio, static_files={
'/': {'content_type': 'text/html', 'filename': 'index.html'},
'/index.html': {'content_type': 'text/html',
'filename': 'index.html'},
})
eventlet.wsgi.server(eventlet.listen(('', 8000)), app)
"""
def __init__(self, engineio_app, wsgi_app=None, static_files=None,
engineio_path='engine.io'):
self.engineio_app = engineio_app
self.wsgi_app = wsgi_app
self.engineio_path = engineio_path.strip('/')
self.static_files = static_files or {}
def __call__(self, environ, start_response):
if 'gunicorn.socket' in environ:
# gunicorn saves the socket under environ['gunicorn.socket'], while
# eventlet saves it under environ['eventlet.input']. Eventlet also
# stores the socket inside a wrapper class, while gunicon writes it
# directly into the environment. To give eventlet's WebSocket
# module access to this socket when running under gunicorn, here we
# copy the socket to the eventlet format.
class Input(object):
def __init__(self, socket):
self.socket = socket
def get_socket(self):
return self.socket
environ['eventlet.input'] = Input(environ['gunicorn.socket'])
path = environ['PATH_INFO']
if path is not None and \
path.startswith('/{0}/'.format(self.engineio_path)):
return self.engineio_app.handle_request(environ, start_response)
else:
static_file = get_static_file(path, self.static_files) \
if self.static_files else None
if static_file:
if os.path.exists(static_file['filename']):
start_response(
'200 OK',
[('Content-Type', static_file['content_type'])])
with open(static_file['filename'], 'rb') as f:
return [f.read()]
else:
return self.not_found(start_response)
elif self.wsgi_app is not None:
return self.wsgi_app(environ, start_response)
return self.not_found(start_response)
def not_found(self, start_response):
start_response("404 Not Found", [('Content-Type', 'text/plain')])
return [b'Not Found']
class Middleware(WSGIApp):
"""This class has been renamed to ``WSGIApp`` and is now deprecated."""
def __init__(self, engineio_app, wsgi_app=None,
engineio_path='engine.io'):
super(Middleware, self).__init__(engineio_app, wsgi_app,
engineio_path=engineio_path)

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