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added git and edited settings.py

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This commit is contained in:
Esther Kleinhenz 2018-06-27 09:56:44 +02:00
commit 0bc13ada46
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.gitignore vendored Normal file
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*.pyc
__pycache__
myvenv
db.sqlite3
.DS_Store

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.vscode/settings.json vendored Normal file
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{
"python.pythonPath": "${workspaceFolder}/thesisenv/bin/python"
}

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application/__init__.py Normal file
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application/admin.py Normal file
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from django.contrib import admin
# Register your models here.

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application/apps.py Normal file
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from django.apps import AppConfig
class ApplicationConfig(AppConfig):
name = 'application'

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application/migrations/__init__.py Normal file
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application/models.py Normal file
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from django.db import models
from django.utils import timezone
class Post(models.Model):
author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
title = models.CharField(max_length=200)
text = models.TextField()
created_date = models.DateTimeField(
default=timezone.now)
published_date = models.DateTimeField(
blank=True, null=True)
def publish(self):
self.published_date = timezone.now()
self.save()
def __str__(self):
return self.title

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from django.test import TestCase
# Create your tests here.

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application/views.py Normal file
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from django.shortcuts import render
# Create your views here.

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#!/usr/bin/env python
import os
import sys
if __name__ == "__main__":
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
try:
from django.core.management import execute_from_command_line
except ImportError as exc:
raise ImportError(
"Couldn't import Django. Are you sure it's installed and "
"available on your PYTHONPATH environment variable? Did you "
"forget to activate a virtual environment?"
) from exc
execute_from_command_line(sys.argv)

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mysite/__init__.py Normal file
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mysite/settings.py Normal file
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"""
Django settings for mysite project.
Generated by 'django-admin startproject' using Django 2.0.6.
For more information on this file, see
https://docs.djangoproject.com/en/2.0/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.0/ref/settings/
"""
import os
import re
import socket
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.0/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'rh2cynsps7=3fb-bmb!+6g(!a(j5i3dq54ps08y2^py8z*49ct'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Development or Production
r = re.search(r'^172.17', socket.gethostbyname(socket.gethostname()))
DEVELOPMENT = (r == None)
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'application',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'mysite.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'mysite.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.0/ref/settings/#databases
if DEVELOPMENT:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
else:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'django-app',
'USER': 'django-app',
'PASSWORD': '*******',
'HOST': 'mysql',
'PORT': '3306',
'OPTIONS': {
'init_command': "SET sql_mode='STRICT_TRANS_TABLES'"
},
}
}
# Password validation
# https://docs.djangoproject.com/en/2.0/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.0/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'Europe/Berlin'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.0/howto/static-files/
STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
# Konfiguration des Auth-Systems
LDAP_DOMAIN = 'ADS1'
LDAP_SERVER = 'gso1.ads1.fh-nuernberg.de'
if DEVELOPMENT:
LOGIN_REDIRECT_URL = '/'
LOGOUT_REDIRECT_URL = '/'
LOGIN_URL = "/accounts/login/"
else:
LOGIN_REDIRECT_URL = '/app/'
LOGOUT_REDIRECT_URL = '/app/'
LOGIN_URL = "/app/accounts/login/"
if DEVELOPMENT:
AUTHENTICATION_BACKENDS = [
'django.contrib.auth.backends.ModelBackend',
]
else:
AUTHENTICATION_BACKENDS = [
'django.contrib.auth.backends.ModelBackend',
'medinf.ldap_backend.LdapBackend',
]

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"""mysite URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.0/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
urlpatterns = [
path('admin/', admin.site.urls),
]

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"""
WSGI config for mysite project.
It exposes the WSGI callable as a module-level variable named ``application``.
For more information on this file, see
https://docs.djangoproject.com/en/2.0/howto/deployment/wsgi/
"""
import os
from django.core.wsgi import get_wsgi_application
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
application = get_wsgi_application()

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# This file must be used with "source bin/activate" *from bash*
# you cannot run it directly
deactivate () {
# reset old environment variables
if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
PATH="${_OLD_VIRTUAL_PATH:-}"
export PATH
unset _OLD_VIRTUAL_PATH
fi
if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
export PYTHONHOME
unset _OLD_VIRTUAL_PYTHONHOME
fi
# This should detect bash and zsh, which have a hash command that must
# be called to get it to forget past commands. Without forgetting
# past commands the $PATH changes we made may not be respected
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
hash -r
fi
if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
PS1="${_OLD_VIRTUAL_PS1:-}"
export PS1
unset _OLD_VIRTUAL_PS1
fi
unset VIRTUAL_ENV
if [ ! "$1" = "nondestructive" ] ; then
# Self destruct!
unset -f deactivate
fi
}
# unset irrelevant variables
deactivate nondestructive
VIRTUAL_ENV="/Users/Esthi/thesis_ek/thesisenv"
export VIRTUAL_ENV
_OLD_VIRTUAL_PATH="$PATH"
PATH="$VIRTUAL_ENV/bin:$PATH"
export PATH
# unset PYTHONHOME if set
# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
# could use `if (set -u; : $PYTHONHOME) ;` in bash
if [ -n "${PYTHONHOME:-}" ] ; then
_OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
unset PYTHONHOME
fi
if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
_OLD_VIRTUAL_PS1="${PS1:-}"
if [ "x(thesisenv) " != x ] ; then
PS1="(thesisenv) ${PS1:-}"
else
if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then
# special case for Aspen magic directories
# see http://www.zetadev.com/software/aspen/
PS1="[`basename \`dirname \"$VIRTUAL_ENV\"\``] $PS1"
else
PS1="(`basename \"$VIRTUAL_ENV\"`)$PS1"
fi
fi
export PS1
fi
# This should detect bash and zsh, which have a hash command that must
# be called to get it to forget past commands. Without forgetting
# past commands the $PATH changes we made may not be respected
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
hash -r
fi

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# This file must be used with "source bin/activate.csh" *from csh*.
# You cannot run it directly.
# Created by Davide Di Blasi <davidedb@gmail.com>.
# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate'
# Unset irrelevant variables.
deactivate nondestructive
setenv VIRTUAL_ENV "/Users/Esthi/thesis_ek/thesisenv"
set _OLD_VIRTUAL_PATH="$PATH"
setenv PATH "$VIRTUAL_ENV/bin:$PATH"
set _OLD_VIRTUAL_PROMPT="$prompt"
if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
if ("thesisenv" != "") then
set env_name = "thesisenv"
else
if (`basename "VIRTUAL_ENV"` == "__") then
# special case for Aspen magic directories
# see http://www.zetadev.com/software/aspen/
set env_name = `basename \`dirname "$VIRTUAL_ENV"\``
else
set env_name = `basename "$VIRTUAL_ENV"`
endif
endif
set prompt = "[$env_name] $prompt"
unset env_name
endif
alias pydoc python -m pydoc
rehash

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# This file must be used with ". bin/activate.fish" *from fish* (http://fishshell.org)
# you cannot run it directly
function deactivate -d "Exit virtualenv and return to normal shell environment"
# reset old environment variables
if test -n "$_OLD_VIRTUAL_PATH"
set -gx PATH $_OLD_VIRTUAL_PATH
set -e _OLD_VIRTUAL_PATH
end
if test -n "$_OLD_VIRTUAL_PYTHONHOME"
set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
set -e _OLD_VIRTUAL_PYTHONHOME
end
if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
functions -e fish_prompt
set -e _OLD_FISH_PROMPT_OVERRIDE
functions -c _old_fish_prompt fish_prompt
functions -e _old_fish_prompt
end
set -e VIRTUAL_ENV
if test "$argv[1]" != "nondestructive"
# Self destruct!
functions -e deactivate
end
end
# unset irrelevant variables
deactivate nondestructive
set -gx VIRTUAL_ENV "/Users/Esthi/thesis_ek/thesisenv"
set -gx _OLD_VIRTUAL_PATH $PATH
set -gx PATH "$VIRTUAL_ENV/bin" $PATH
# unset PYTHONHOME if set
if set -q PYTHONHOME
set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
set -e PYTHONHOME
end
if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
# fish uses a function instead of an env var to generate the prompt.
# save the current fish_prompt function as the function _old_fish_prompt
functions -c fish_prompt _old_fish_prompt
# with the original prompt function renamed, we can override with our own.
function fish_prompt
# Save the return status of the last command
set -l old_status $status
# Prompt override?
if test -n "(thesisenv) "
printf "%s%s" "(thesisenv) " (set_color normal)
else
# ...Otherwise, prepend env
set -l _checkbase (basename "$VIRTUAL_ENV")
if test $_checkbase = "__"
# special case for Aspen magic directories
# see http://www.zetadev.com/software/aspen/
printf "%s[%s]%s " (set_color -b blue white) (basename (dirname "$VIRTUAL_ENV")) (set_color normal)
else
printf "%s(%s)%s" (set_color -b blue white) (basename "$VIRTUAL_ENV") (set_color normal)
end
end
# Restore the return status of the previous command.
echo "exit $old_status" | .
_old_fish_prompt
end
set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
end

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from django.core.management import execute_from_command_line
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(execute_from_command_line())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
from django.core import management
if __name__ == "__main__":
management.execute_from_command_line()

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from setuptools.command.easy_install import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from setuptools.command.easy_install import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python
# -*- coding: utf-8 -*-
import re
import sys
from pylint import run_epylint
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(run_epylint())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python
# -*- coding: utf-8 -*-
import re
import sys
from isort.main import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from pip._internal import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from pip._internal import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python3
# -*- coding: utf-8 -*-
import re
import sys
from pip._internal import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python
# -*- coding: utf-8 -*-
import re
import sys
from pylint import run_pylint
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(run_pylint())

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python
# -*- coding: utf-8 -*-
import re
import sys
from pylint import run_pyreverse
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(run_pyreverse())

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python3

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/usr/local/bin/python3

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#!/Users/Esthi/thesis_ek/thesisenv/bin/python
# -*- coding: utf-8 -*-
import re
import sys
from pylint import run_symilar
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(run_symilar())

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Django is a high-level Python Web framework that encourages rapid development
and clean, pragmatic design. Thanks for checking it out.
All documentation is in the "``docs``" directory and online at
https://docs.djangoproject.com/en/stable/. If you're just getting started,
here's how we recommend you read the docs:
* First, read ``docs/intro/install.txt`` for instructions on installing Django.
* Next, work through the tutorials in order (``docs/intro/tutorial01.txt``,
``docs/intro/tutorial02.txt``, etc.).
* If you want to set up an actual deployment server, read
``docs/howto/deployment/index.txt`` for instructions.
* You'll probably want to read through the topical guides (in ``docs/topics``)
next; from there you can jump to the HOWTOs (in ``docs/howto``) for specific
problems, and check out the reference (``docs/ref``) for gory details.
* See ``docs/README`` for instructions on building an HTML version of the docs.
Docs are updated rigorously. If you find any problems in the docs, or think
they should be clarified in any way, please take 30 seconds to fill out a
ticket here: https://code.djangoproject.com/newticket
To get more help:
* Join the ``#django`` channel on irc.freenode.net. Lots of helpful people hang out
there. Read the archives at https://botbot.me/freenode/django/.
* Join the django-users mailing list, or read the archives, at
https://groups.google.com/group/django-users.
To contribute to Django:
* Check out https://docs.djangoproject.com/en/dev/internals/contributing/ for
information about getting involved.
To run Django's test suite:
* Follow the instructions in the "Unit tests" section of
``docs/internals/contributing/writing-code/unit-tests.txt``, published online at
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/#running-the-unit-tests

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thesisenv/lib/python3.6/site-packages/Django-2.0.6.dist-info/INSTALLER Normal file
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pip

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Copyright (c) Django Software Foundation and individual contributors.
All rights reserved.
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 Django 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 OWNER 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: 2.0
Name: Django
Version: 2.0.6
Summary: A high-level Python Web framework that encourages rapid development and clean, pragmatic design.
Home-page: https://www.djangoproject.com/
Author: Django Software Foundation
Author-email: foundation@djangoproject.com
License: BSD
Project-URL: Documentation, https://docs.djangoproject.com/
Project-URL: Funding, https://www.djangoproject.com/fundraising/
Project-URL: Source, https://github.com/django/django
Project-URL: Tracker, https://code.djangoproject.com/
Description-Content-Type: UNKNOWN
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Web Environment
Classifier: Framework :: Django
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
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 :: Only
Classifier: Topic :: Internet :: WWW/HTTP
Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
Classifier: Topic :: Internet :: WWW/HTTP :: WSGI
Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Requires-Python: >=3.4
Requires-Dist: pytz
Provides-Extra: argon2
Requires-Dist: argon2-cffi (>=16.1.0); extra == 'argon2'
Provides-Extra: bcrypt
Requires-Dist: bcrypt; extra == 'bcrypt'
Django is a high-level Python Web framework that encourages rapid development
and clean, pragmatic design. Thanks for checking it out.
All documentation is in the "``docs``" directory and online at
https://docs.djangoproject.com/en/stable/. If you're just getting started,
here's how we recommend you read the docs:
* First, read ``docs/intro/install.txt`` for instructions on installing Django.
* Next, work through the tutorials in order (``docs/intro/tutorial01.txt``,
``docs/intro/tutorial02.txt``, etc.).
* If you want to set up an actual deployment server, read
``docs/howto/deployment/index.txt`` for instructions.
* You'll probably want to read through the topical guides (in ``docs/topics``)
next; from there you can jump to the HOWTOs (in ``docs/howto``) for specific
problems, and check out the reference (``docs/ref``) for gory details.
* See ``docs/README`` for instructions on building an HTML version of the docs.
Docs are updated rigorously. If you find any problems in the docs, or think
they should be clarified in any way, please take 30 seconds to fill out a
ticket here: https://code.djangoproject.com/newticket
To get more help:
* Join the ``#django`` channel on irc.freenode.net. Lots of helpful people hang out
there. Read the archives at https://botbot.me/freenode/django/.
* Join the django-users mailing list, or read the archives, at
https://groups.google.com/group/django-users.
To contribute to Django:
* Check out https://docs.djangoproject.com/en/dev/internals/contributing/ for
information about getting involved.
To run Django's test suite:
* Follow the instructions in the "Unit tests" section of
``docs/internals/contributing/writing-code/unit-tests.txt``, published online at
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/#running-the-unit-tests

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Generator: bdist_wheel (0.30.0)
Root-Is-Purelib: true
Tag: py3-none-any

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[console_scripts]
django-admin = django.core.management:execute_from_command_line

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django

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Astroid
=======
.. image:: https://travis-ci.org/PyCQA/astroid.svg?branch=master
:target: https://travis-ci.org/PyCQA/astroid
.. image:: https://ci.appveyor.com/api/projects/status/co3u42kunguhbh6l/branch/master?svg=true
:alt: AppVeyor Build Status
:target: https://ci.appveyor.com/project/PCManticore/astroid
.. image:: https://coveralls.io/repos/github/PyCQA/astroid/badge.svg?branch=master
:target: https://coveralls.io/github/PyCQA/astroid?branch=master
.. image:: https://readthedocs.org/projects/astroid/badge/?version=latest
:target: http://astroid.readthedocs.io/en/latest/?badge=latest
:alt: Documentation Status
What's this?
------------
The aim of this module is to provide a common base representation of
python source code for projects such as pychecker, pyreverse,
pylint... Well, actually the development of this library is essentially
governed by pylint's needs. It used to be called logilab-astng.
It provides a compatible representation which comes from the `_ast`
module. It rebuilds the tree generated by the builtin _ast module by
recursively walking down the AST and building an extended ast. The new
node classes have additional methods and attributes for different
usages. They include some support for static inference and local name
scopes. Furthermore, astroid builds partial trees by inspecting living
objects.
Installation
------------
Extract the tarball, jump into the created directory and run::
python setup.py install
For installation options, see::
python setup.py install --help
If you have any questions, please mail the code-quality@python.org
mailing list for support. See
http://mail.python.org/mailman/listinfo/code-quality for subscription
information and archives. You may find older archives at
http://lists.logilab.org/mailman/listinfo/python-projects .
Python Versions
---------------
astroid is compatible with Python 2.7 as well as 3.4 and later. astroid uses
the same code base for both Python versions, using six.
Test
----
Tests are in the 'test' subdirectory. To launch the whole tests suite
at once, you can use unittest discover::
python -m unittest discover -p "unittest*.py"

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pip

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Metadata-Version: 2.0
Name: astroid
Version: 1.6.5
Summary: A abstract syntax tree for Python with inference support.
Home-page: https://github.com/PyCQA/astroid
Author: Python Code Quality Authority
Author-email: code-quality@python.org
License: LGPL
Platform: UNKNOWN
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Software Development :: Quality Assurance
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 :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
Requires-Dist: lazy-object-proxy
Requires-Dist: six
Requires-Dist: wrapt
Requires-Dist: enum34 (>=1.1.3); python_version<"3.4"
Requires-Dist: singledispatch; python_version<"3.4"
Requires-Dist: backports.functools-lru-cache; python_version<"3.4"
Astroid
=======
.. image:: https://travis-ci.org/PyCQA/astroid.svg?branch=master
:target: https://travis-ci.org/PyCQA/astroid
.. image:: https://ci.appveyor.com/api/projects/status/co3u42kunguhbh6l/branch/master?svg=true
:alt: AppVeyor Build Status
:target: https://ci.appveyor.com/project/PCManticore/astroid
.. image:: https://coveralls.io/repos/github/PyCQA/astroid/badge.svg?branch=master
:target: https://coveralls.io/github/PyCQA/astroid?branch=master
.. image:: https://readthedocs.org/projects/astroid/badge/?version=latest
:target: http://astroid.readthedocs.io/en/latest/?badge=latest
:alt: Documentation Status
What's this?
------------
The aim of this module is to provide a common base representation of
python source code for projects such as pychecker, pyreverse,
pylint... Well, actually the development of this library is essentially
governed by pylint's needs. It used to be called logilab-astng.
It provides a compatible representation which comes from the `_ast`
module. It rebuilds the tree generated by the builtin _ast module by
recursively walking down the AST and building an extended ast. The new
node classes have additional methods and attributes for different
usages. They include some support for static inference and local name
scopes. Furthermore, astroid builds partial trees by inspecting living
objects.
Installation
------------
Extract the tarball, jump into the created directory and run::
python setup.py install
For installation options, see::
python setup.py install --help
If you have any questions, please mail the code-quality@python.org
mailing list for support. See
http://mail.python.org/mailman/listinfo/code-quality for subscription
information and archives. You may find older archives at
http://lists.logilab.org/mailman/listinfo/python-projects .
Python Versions
---------------
astroid is compatible with Python 2.7 as well as 3.4 and later. astroid uses
the same code base for both Python versions, using six.
Test
----
Tests are in the 'test' subdirectory. To launch the whole tests suite
at once, you can use unittest discover::
python -m unittest discover -p "unittest*.py"

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Wheel-Version: 1.0
Generator: bdist_wheel (0.30.0)
Root-Is-Purelib: true
Tag: py2-none-any
Tag: py3-none-any

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{"classifiers": ["Topic :: Software Development :: Libraries :: Python Modules", "Topic :: Software Development :: Quality Assurance", "Programming Language :: Python", "Programming Language :: Python :: 2", "Programming Language :: Python :: 2.7", "Programming Language :: Python :: 3", "Programming Language :: Python :: 3.4", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Programming Language :: Python :: Implementation :: CPython", "Programming Language :: Python :: Implementation :: PyPy"], "extensions": {"python.details": {"contacts": [{"email": "code-quality@python.org", "name": "Python Code Quality Authority", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst"}, "project_urls": {"Home": "https://github.com/PyCQA/astroid"}}}, "extras": [], "generator": "bdist_wheel (0.30.0)", "license": "LGPL", "metadata_version": "2.0", "name": "astroid", "requires_python": ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*", "run_requires": [{"requires": ["lazy-object-proxy", "six", "wrapt"]}, {"environment": "python_version<\"3.4\"", "requires": ["backports.functools-lru-cache", "enum34 (>=1.1.3)", "singledispatch"]}], "summary": "A abstract syntax tree for Python with inference support.", "version": "1.6.5"}

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astroid

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# Copyright (c) 2006-2013, 2015 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014 Google, Inc.
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Python Abstract Syntax Tree New Generation
The aim of this module is to provide a common base representation of
python source code for projects such as pychecker, pyreverse,
pylint... Well, actually the development of this library is essentially
governed by pylint's needs.
It extends class defined in the python's _ast module with some
additional methods and attributes. Instance attributes are added by a
builder object, which can either generate extended ast (let's call
them astroid ;) by visiting an existent ast tree or by inspecting living
object. Methods are added by monkey patching ast classes.
Main modules are:
* nodes and scoped_nodes for more information about methods and
attributes added to different node classes
* the manager contains a high level object to get astroid trees from
source files and living objects. It maintains a cache of previously
constructed tree for quick access
* builder contains the class responsible to build astroid trees
"""
import os
import sys
import re
from operator import attrgetter
import enum
_Context = enum.Enum('Context', 'Load Store Del')
Load = _Context.Load
Store = _Context.Store
Del = _Context.Del
del _Context
from .__pkginfo__ import version as __version__
# WARNING: internal imports order matters !
# pylint: disable=redefined-builtin, wildcard-import
# make all exception classes accessible from astroid package
from astroid.exceptions import *
# make all node classes accessible from astroid package
from astroid.nodes import *
# trigger extra monkey-patching
from astroid import inference
# more stuff available
from astroid import raw_building
from astroid.bases import BaseInstance, Instance, BoundMethod, UnboundMethod
from astroid.node_classes import are_exclusive, unpack_infer
from astroid.scoped_nodes import builtin_lookup
from astroid.builder import parse, extract_node
from astroid.util import Uninferable, YES
# make a manager instance (borg) accessible from astroid package
from astroid.manager import AstroidManager
MANAGER = AstroidManager()
del AstroidManager
# transform utilities (filters and decorator)
class AsStringRegexpPredicate(object):
"""ClassDef to be used as predicate that may be given to `register_transform`
First argument is a regular expression that will be searched against the `as_string`
representation of the node onto which it's applied.
If specified, the second argument is an `attrgetter` expression that will be
applied on the node first to get the actual node on which `as_string` should
be called.
WARNING: This can be fairly slow, as it has to convert every AST node back
to Python code; you should consider examining the AST directly instead.
"""
def __init__(self, regexp, expression=None):
self.regexp = re.compile(regexp)
self.expression = expression
def __call__(self, node):
if self.expression is not None:
node = attrgetter(self.expression)(node)
# pylint: disable=no-member; github.com/pycqa/astroid/126
return self.regexp.search(node.as_string())
def inference_tip(infer_function, raise_on_overwrite=False):
"""Given an instance specific inference function, return a function to be
given to MANAGER.register_transform to set this inference function.
:param bool raise_on_overwrite: Raise an `InferenceOverwriteError`
if the inference tip will overwrite another. Used for debugging
Typical usage
.. sourcecode:: python
MANAGER.register_transform(Call, inference_tip(infer_named_tuple),
predicate)
.. Note::
Using an inference tip will override
any previously set inference tip for the given
node. Use a predicate in the transform to prevent
excess overwrites.
"""
def transform(node, infer_function=infer_function):
if (raise_on_overwrite
and node._explicit_inference is not None
and node._explicit_inference is not infer_function):
raise InferenceOverwriteError(
"Inference already set to {existing_inference}. "
"Trying to overwrite with {new_inference} for {node}"
.format(existing_inference=infer_function,
new_inference=node._explicit_inference,
node=node))
node._explicit_inference = infer_function
return node
return transform
def register_module_extender(manager, module_name, get_extension_mod):
def transform(node):
extension_module = get_extension_mod()
for name, objs in extension_module.locals.items():
node.locals[name] = objs
for obj in objs:
if obj.parent is extension_module:
obj.parent = node
manager.register_transform(Module, transform, lambda n: n.name == module_name)
# load brain plugins
BRAIN_MODULES_DIR = os.path.join(os.path.dirname(__file__), 'brain')
if BRAIN_MODULES_DIR not in sys.path:
# add it to the end of the list so user path take precedence
sys.path.append(BRAIN_MODULES_DIR)
# load modules in this directory
for module in os.listdir(BRAIN_MODULES_DIR):
if module.endswith('.py'):
__import__(module[:-3])

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# Copyright (c) 2006-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014 Google, Inc.
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""astroid packaging information"""
from sys import version_info as py_version
from pkg_resources import parse_version
from setuptools import __version__ as setuptools_version
distname = 'astroid'
modname = 'astroid'
version = '1.6.5'
numversion = tuple(map(int, version.split('.')))
extras_require = {}
install_requires = ['lazy_object_proxy', 'six', 'wrapt']
def has_environment_marker_range_operators_support():
"""Code extracted from 'pytest/setup.py'
https://github.com/pytest-dev/pytest/blob/7538680c/setup.py#L31
The first known release to support environment marker with range operators
it is 17.1, see: https://setuptools.readthedocs.io/en/latest/history.html#id113
"""
return parse_version(setuptools_version) >= parse_version('17.1')
if has_environment_marker_range_operators_support():
extras_require[':python_version<"3.4"'] = ['enum34>=1.1.3',
'singledispatch',
'backports.functools_lru_cache']
else:
if py_version < (3, 4):
install_requires.extend(['enum34',
'singledispatch',
'backports.functools_lru_cache'])
# pylint: disable=redefined-builtin; why license is a builtin anyway?
license = 'LGPL'
author = 'Python Code Quality Authority'
author_email = 'code-quality@python.org'
mailinglist = "mailto://%s" % author_email
web = 'https://github.com/PyCQA/astroid'
description = "A abstract syntax tree for Python with inference support."
classifiers = ["Topic :: Software Development :: Libraries :: Python Modules",
"Topic :: Software Development :: Quality Assurance",
"Programming Language :: Python",
"Programming Language :: Python :: 2",
"Programming Language :: Python :: 2.7",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3.4",
"Programming Language :: Python :: 3.5",
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: Implementation :: CPython",
"Programming Language :: Python :: Implementation :: PyPy",
]

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# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import six
from astroid import bases
from astroid import context as contextmod
from astroid import exceptions
from astroid import nodes
from astroid import util
class CallSite(object):
"""Class for understanding arguments passed into a call site
It needs a call context, which contains the arguments and the
keyword arguments that were passed into a given call site.
In order to infer what an argument represents, call
:meth:`infer_argument` with the corresponding function node
and the argument name.
"""
def __init__(self, callcontext):
args = callcontext.args
keywords = callcontext.keywords
self.duplicated_keywords = set()
self._unpacked_args = self._unpack_args(args)
self._unpacked_kwargs = self._unpack_keywords(keywords)
self.positional_arguments = [
arg for arg in self._unpacked_args
if arg is not util.Uninferable
]
self.keyword_arguments = {
key: value for key, value in self._unpacked_kwargs.items()
if value is not util.Uninferable
}
@classmethod
def from_call(cls, call_node):
"""Get a CallSite object from the given Call node."""
callcontext = contextmod.CallContext(call_node.args,
call_node.keywords)
return cls(callcontext)
def has_invalid_arguments(self):
"""Check if in the current CallSite were passed *invalid* arguments
This can mean multiple things. For instance, if an unpacking
of an invalid object was passed, then this method will return True.
Other cases can be when the arguments can't be inferred by astroid,
for example, by passing objects which aren't known statically.
"""
return len(self.positional_arguments) != len(self._unpacked_args)
def has_invalid_keywords(self):
"""Check if in the current CallSite were passed *invalid* keyword arguments
For instance, unpacking a dictionary with integer keys is invalid
(**{1:2}), because the keys must be strings, which will make this
method to return True. Other cases where this might return True if
objects which can't be inferred were passed.
"""
return len(self.keyword_arguments) != len(self._unpacked_kwargs)
def _unpack_keywords(self, keywords):
values = {}
context = contextmod.InferenceContext()
for name, value in keywords:
if name is None:
# Then it's an unpacking operation (**)
try:
inferred = next(value.infer(context=context))
except exceptions.InferenceError:
values[name] = util.Uninferable
continue
if not isinstance(inferred, nodes.Dict):
# Not something we can work with.
values[name] = util.Uninferable
continue
for dict_key, dict_value in inferred.items:
try:
dict_key = next(dict_key.infer(context=context))
except exceptions.InferenceError:
values[name] = util.Uninferable
continue
if not isinstance(dict_key, nodes.Const):
values[name] = util.Uninferable
continue
if not isinstance(dict_key.value, six.string_types):
values[name] = util.Uninferable
continue
if dict_key.value in values:
# The name is already in the dictionary
values[dict_key.value] = util.Uninferable
self.duplicated_keywords.add(dict_key.value)
continue
values[dict_key.value] = dict_value
else:
values[name] = value
return values
@staticmethod
def _unpack_args(args):
values = []
context = contextmod.InferenceContext()
for arg in args:
if isinstance(arg, nodes.Starred):
try:
inferred = next(arg.value.infer(context=context))
except exceptions.InferenceError:
values.append(util.Uninferable)
continue
if inferred is util.Uninferable:
values.append(util.Uninferable)
continue
if not hasattr(inferred, 'elts'):
values.append(util.Uninferable)
continue
values.extend(inferred.elts)
else:
values.append(arg)
return values
def infer_argument(self, funcnode, name, context):
"""infer a function argument value according to the call context
Arguments:
funcnode: The function being called.
name: The name of the argument whose value is being inferred.
context: TODO
"""
if name in self.duplicated_keywords:
raise exceptions.InferenceError('The arguments passed to {func!r} '
' have duplicate keywords.',
call_site=self, func=funcnode,
arg=name, context=context)
# Look into the keywords first, maybe it's already there.
try:
return self.keyword_arguments[name].infer(context)
except KeyError:
pass
# Too many arguments given and no variable arguments.
if len(self.positional_arguments) > len(funcnode.args.args):
if not funcnode.args.vararg:
raise exceptions.InferenceError('Too many positional arguments '
'passed to {func!r} that does '
'not have *args.',
call_site=self, func=funcnode,
arg=name, context=context)
positional = self.positional_arguments[:len(funcnode.args.args)]
vararg = self.positional_arguments[len(funcnode.args.args):]
argindex = funcnode.args.find_argname(name)[0]
kwonlyargs = set(arg.name for arg in funcnode.args.kwonlyargs)
kwargs = {
key: value for key, value in self.keyword_arguments.items()
if key not in kwonlyargs
}
# If there are too few positionals compared to
# what the function expects to receive, check to see
# if the missing positional arguments were passed
# as keyword arguments and if so, place them into the
# positional args list.
if len(positional) < len(funcnode.args.args):
for func_arg in funcnode.args.args:
if func_arg.name in kwargs:
arg = kwargs.pop(func_arg.name)
positional.append(arg)
if argindex is not None:
# 2. first argument of instance/class method
if argindex == 0 and funcnode.type in ('method', 'classmethod'):
if context.boundnode is not None:
boundnode = context.boundnode
else:
# XXX can do better ?
boundnode = funcnode.parent.frame()
if isinstance(boundnode, nodes.ClassDef):
# Verify that we're accessing a method
# of the metaclass through a class, as in
# `cls.metaclass_method`. In this case, the
# first argument is always the class.
method_scope = funcnode.parent.scope()
if method_scope is boundnode.metaclass():
return iter((boundnode, ))
if funcnode.type == 'method':
if not isinstance(boundnode, bases.Instance):
boundnode = bases.Instance(boundnode)
return iter((boundnode,))
if funcnode.type == 'classmethod':
return iter((boundnode,))
# if we have a method, extract one position
# from the index, so we'll take in account
# the extra parameter represented by `self` or `cls`
if funcnode.type in ('method', 'classmethod'):
argindex -= 1
# 2. search arg index
try:
return self.positional_arguments[argindex].infer(context)
except IndexError:
pass
if funcnode.args.kwarg == name:
# It wants all the keywords that were passed into
# the call site.
if self.has_invalid_keywords():
raise exceptions.InferenceError(
"Inference failed to find values for all keyword arguments "
"to {func!r}: {unpacked_kwargs!r} doesn't correspond to "
"{keyword_arguments!r}.",
keyword_arguments=self.keyword_arguments,
unpacked_kwargs=self._unpacked_kwargs,
call_site=self, func=funcnode, arg=name, context=context)
kwarg = nodes.Dict(lineno=funcnode.args.lineno,
col_offset=funcnode.args.col_offset,
parent=funcnode.args)
kwarg.postinit([(nodes.const_factory(key), value)
for key, value in kwargs.items()])
return iter((kwarg, ))
elif funcnode.args.vararg == name:
# It wants all the args that were passed into
# the call site.
if self.has_invalid_arguments():
raise exceptions.InferenceError(
"Inference failed to find values for all positional "
"arguments to {func!r}: {unpacked_args!r} doesn't "
"correspond to {positional_arguments!r}.",
positional_arguments=self.positional_arguments,
unpacked_args=self._unpacked_args,
call_site=self, func=funcnode, arg=name, context=context)
args = nodes.Tuple(lineno=funcnode.args.lineno,
col_offset=funcnode.args.col_offset,
parent=funcnode.args)
args.postinit(vararg)
return iter((args, ))
# Check if it's a default parameter.
try:
return funcnode.args.default_value(name).infer(context)
except exceptions.NoDefault:
pass
raise exceptions.InferenceError('No value found for argument {name} to '
'{func!r}', call_site=self,
func=funcnode, arg=name, context=context)

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# Copyright (c) 2009-2011, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2013-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2013-2014 Google, Inc.
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""This module renders Astroid nodes as string:
* :func:`to_code` function return equivalent (hopefully valid) python string
* :func:`dump` function return an internal representation of nodes found
in the tree, useful for debugging or understanding the tree structure
"""
import sys
import six
# pylint: disable=unused-argument
class AsStringVisitor(object):
"""Visitor to render an Astroid node as a valid python code string"""
def __init__(self, indent):
self.indent = indent
def __call__(self, node):
"""Makes this visitor behave as a simple function"""
return node.accept(self)
def _stmt_list(self, stmts):
"""return a list of nodes to string"""
stmts = '\n'.join([nstr for nstr in [n.accept(self) for n in stmts] if nstr])
return self.indent + stmts.replace('\n', '\n'+self.indent)
## visit_<node> methods ###########################################
def visit_arguments(self, node):
"""return an astroid.Function node as string"""
return node.format_args()
def visit_assignattr(self, node):
"""return an astroid.AssAttr node as string"""
return self.visit_attribute(node)
def visit_assert(self, node):
"""return an astroid.Assert node as string"""
if node.fail:
return 'assert %s, %s' % (node.test.accept(self),
node.fail.accept(self))
return 'assert %s' % node.test.accept(self)
def visit_assignname(self, node):
"""return an astroid.AssName node as string"""
return node.name
def visit_assign(self, node):
"""return an astroid.Assign node as string"""
lhs = ' = '.join([n.accept(self) for n in node.targets])
return '%s = %s' % (lhs, node.value.accept(self))
def visit_augassign(self, node):
"""return an astroid.AugAssign node as string"""
return '%s %s %s' % (node.target.accept(self), node.op, node.value.accept(self))
def visit_annassign(self, node):
"""Return an astroid.AugAssign node as string"""
target = node.target.accept(self)
annotation = node.annotation.accept(self)
if node.value is None:
return '%s: %s' % (target, annotation)
return '%s: %s = %s' % (target, annotation, node.value.accept(self))
def visit_repr(self, node):
"""return an astroid.Repr node as string"""
return '`%s`' % node.value.accept(self)
def visit_binop(self, node):
"""return an astroid.BinOp node as string"""
return '(%s) %s (%s)' % (node.left.accept(self), node.op, node.right.accept(self))
def visit_boolop(self, node):
"""return an astroid.BoolOp node as string"""
return (' %s ' % node.op).join(['(%s)' % n.accept(self)
for n in node.values])
def visit_break(self, node):
"""return an astroid.Break node as string"""
return 'break'
def visit_call(self, node):
"""return an astroid.Call node as string"""
expr_str = node.func.accept(self)
args = [arg.accept(self) for arg in node.args]
if node.keywords:
keywords = [kwarg.accept(self) for kwarg in node.keywords]
else:
keywords = []
args.extend(keywords)
return '%s(%s)' % (expr_str, ', '.join(args))
def visit_classdef(self, node):
"""return an astroid.ClassDef node as string"""
decorate = node.decorators.accept(self) if node.decorators else ''
bases = ', '.join([n.accept(self) for n in node.bases])
if sys.version_info[0] == 2:
bases = '(%s)' % bases if bases else ''
else:
metaclass = node.metaclass()
if metaclass and not node.has_metaclass_hack():
if bases:
bases = '(%s, metaclass=%s)' % (bases, metaclass.name)
else:
bases = '(metaclass=%s)' % metaclass.name
else:
bases = '(%s)' % bases if bases else ''
docs = '\n%s"""%s"""' % (self.indent, node.doc) if node.doc else ''
return '\n\n%sclass %s%s:%s\n%s\n' % (decorate, node.name, bases, docs,
self._stmt_list(node.body))
def visit_compare(self, node):
"""return an astroid.Compare node as string"""
rhs_str = ' '.join(['%s %s' % (op, expr.accept(self))
for op, expr in node.ops])
return '%s %s' % (node.left.accept(self), rhs_str)
def visit_comprehension(self, node):
"""return an astroid.Comprehension node as string"""
ifs = ''.join([' if %s' % n.accept(self) for n in node.ifs])
return 'for %s in %s%s' % (node.target.accept(self),
node.iter.accept(self), ifs)
def visit_const(self, node):
"""return an astroid.Const node as string"""
return repr(node.value)
def visit_continue(self, node):
"""return an astroid.Continue node as string"""
return 'continue'
def visit_delete(self, node): # XXX check if correct
"""return an astroid.Delete node as string"""
return 'del %s' % ', '.join([child.accept(self)
for child in node.targets])
def visit_delattr(self, node):
"""return an astroid.DelAttr node as string"""
return self.visit_attribute(node)
def visit_delname(self, node):
"""return an astroid.DelName node as string"""
return node.name
def visit_decorators(self, node):
"""return an astroid.Decorators node as string"""
return '@%s\n' % '\n@'.join([item.accept(self) for item in node.nodes])
def visit_dict(self, node):
"""return an astroid.Dict node as string"""
return '{%s}' % ', '.join(self._visit_dict(node))
def _visit_dict(self, node):
for key, value in node.items:
key = key.accept(self)
value = value.accept(self)
if key == '**':
# It can only be a DictUnpack node.
yield key + value
else:
yield '%s: %s' % (key, value)
def visit_dictunpack(self, node):
return '**'
def visit_dictcomp(self, node):
"""return an astroid.DictComp node as string"""
return '{%s: %s %s}' % (node.key.accept(self), node.value.accept(self),
' '.join([n.accept(self) for n in node.generators]))
def visit_expr(self, node):
"""return an astroid.Discard node as string"""
return node.value.accept(self)
def visit_emptynode(self, node):
"""dummy method for visiting an Empty node"""
return ''
def visit_excepthandler(self, node):
if node.type:
if node.name:
excs = 'except %s, %s' % (node.type.accept(self),
node.name.accept(self))
else:
excs = 'except %s' % node.type.accept(self)
else:
excs = 'except'
return '%s:\n%s' % (excs, self._stmt_list(node.body))
def visit_ellipsis(self, node):
"""return an astroid.Ellipsis node as string"""
return '...'
def visit_empty(self, node):
"""return an Empty node as string"""
return ''
def visit_exec(self, node):
"""return an astroid.Exec node as string"""
if node.locals:
return 'exec %s in %s, %s' % (node.expr.accept(self),
node.locals.accept(self),
node.globals.accept(self))
if node.globals:
return 'exec %s in %s' % (node.expr.accept(self),
node.globals.accept(self))
return 'exec %s' % node.expr.accept(self)
def visit_extslice(self, node):
"""return an astroid.ExtSlice node as string"""
return ','.join([dim.accept(self) for dim in node.dims])
def visit_for(self, node):
"""return an astroid.For node as string"""
fors = 'for %s in %s:\n%s' % (node.target.accept(self),
node.iter.accept(self),
self._stmt_list(node.body))
if node.orelse:
fors = '%s\nelse:\n%s' % (fors, self._stmt_list(node.orelse))
return fors
def visit_importfrom(self, node):
"""return an astroid.ImportFrom node as string"""
return 'from %s import %s' % ('.' * (node.level or 0) + node.modname,
_import_string(node.names))
def visit_functiondef(self, node):
"""return an astroid.Function node as string"""
decorate = node.decorators.accept(self) if node.decorators else ''
docs = '\n%s"""%s"""' % (self.indent, node.doc) if node.doc else ''
return_annotation = ''
if six.PY3 and node.returns:
return_annotation = '->' + node.returns.as_string()
trailer = return_annotation + ":"
else:
trailer = ":"
def_format = "\n%sdef %s(%s)%s%s\n%s"
return def_format % (decorate, node.name,
node.args.accept(self),
trailer, docs,
self._stmt_list(node.body))
def visit_generatorexp(self, node):
"""return an astroid.GeneratorExp node as string"""
return '(%s %s)' % (node.elt.accept(self),
' '.join([n.accept(self) for n in node.generators]))
def visit_attribute(self, node):
"""return an astroid.Getattr node as string"""
return '%s.%s' % (node.expr.accept(self), node.attrname)
def visit_global(self, node):
"""return an astroid.Global node as string"""
return 'global %s' % ', '.join(node.names)
def visit_if(self, node):
"""return an astroid.If node as string"""
ifs = ['if %s:\n%s' % (node.test.accept(self), self._stmt_list(node.body))]
if node.orelse:# XXX use elif ???
ifs.append('else:\n%s' % self._stmt_list(node.orelse))
return '\n'.join(ifs)
def visit_ifexp(self, node):
"""return an astroid.IfExp node as string"""
return '%s if %s else %s' % (node.body.accept(self),
node.test.accept(self),
node.orelse.accept(self))
def visit_import(self, node):
"""return an astroid.Import node as string"""
return 'import %s' % _import_string(node.names)
def visit_keyword(self, node):
"""return an astroid.Keyword node as string"""
if node.arg is None:
return '**%s' % node.value.accept(self)
return '%s=%s' % (node.arg, node.value.accept(self))
def visit_lambda(self, node):
"""return an astroid.Lambda node as string"""
return 'lambda %s: %s' % (node.args.accept(self),
node.body.accept(self))
def visit_list(self, node):
"""return an astroid.List node as string"""
return '[%s]' % ', '.join([child.accept(self) for child in node.elts])
def visit_listcomp(self, node):
"""return an astroid.ListComp node as string"""
return '[%s %s]' % (node.elt.accept(self),
' '.join([n.accept(self) for n in node.generators]))
def visit_module(self, node):
"""return an astroid.Module node as string"""
docs = '"""%s"""\n\n' % node.doc if node.doc else ''
return docs + '\n'.join([n.accept(self) for n in node.body]) + '\n\n'
def visit_name(self, node):
"""return an astroid.Name node as string"""
return node.name
def visit_pass(self, node):
"""return an astroid.Pass node as string"""
return 'pass'
def visit_print(self, node):
"""return an astroid.Print node as string"""
nodes = ', '.join([n.accept(self) for n in node.values])
if not node.nl:
nodes = '%s,' % nodes
if node.dest:
return 'print >> %s, %s' % (node.dest.accept(self), nodes)
return 'print %s' % nodes
def visit_raise(self, node):
"""return an astroid.Raise node as string"""
if node.exc:
if node.inst:
if node.tback:
return 'raise %s, %s, %s' % (node.exc.accept(self),
node.inst.accept(self),
node.tback.accept(self))
return 'raise %s, %s' % (node.exc.accept(self),
node.inst.accept(self))
return 'raise %s' % node.exc.accept(self)
return 'raise'
def visit_return(self, node):
"""return an astroid.Return node as string"""
if node.value:
return 'return %s' % node.value.accept(self)
return 'return'
def visit_index(self, node):
"""return a astroid.Index node as string"""
return node.value.accept(self)
def visit_set(self, node):
"""return an astroid.Set node as string"""
return '{%s}' % ', '.join([child.accept(self) for child in node.elts])
def visit_setcomp(self, node):
"""return an astroid.SetComp node as string"""
return '{%s %s}' % (node.elt.accept(self),
' '.join([n.accept(self) for n in node.generators]))
def visit_slice(self, node):
"""return a astroid.Slice node as string"""
lower = node.lower.accept(self) if node.lower else ''
upper = node.upper.accept(self) if node.upper else''
step = node.step.accept(self) if node.step else ''
if step:
return '%s:%s:%s' % (lower, upper, step)
return '%s:%s' % (lower, upper)
def visit_subscript(self, node):
"""return an astroid.Subscript node as string"""
return '%s[%s]' % (node.value.accept(self), node.slice.accept(self))
def visit_tryexcept(self, node):
"""return an astroid.TryExcept node as string"""
trys = ['try:\n%s' % self._stmt_list(node.body)]
for handler in node.handlers:
trys.append(handler.accept(self))
if node.orelse:
trys.append('else:\n%s' % self._stmt_list(node.orelse))
return '\n'.join(trys)
def visit_tryfinally(self, node):
"""return an astroid.TryFinally node as string"""
return 'try:\n%s\nfinally:\n%s' % (self._stmt_list(node.body),
self._stmt_list(node.finalbody))
def visit_tuple(self, node):
"""return an astroid.Tuple node as string"""
if len(node.elts) == 1:
return '(%s, )' % node.elts[0].accept(self)
return '(%s)' % ', '.join([child.accept(self) for child in node.elts])
def visit_unaryop(self, node):
"""return an astroid.UnaryOp node as string"""
if node.op == 'not':
operator = 'not '
else:
operator = node.op
return '%s%s' % (operator, node.operand.accept(self))
def visit_while(self, node):
"""return an astroid.While node as string"""
whiles = 'while %s:\n%s' % (node.test.accept(self),
self._stmt_list(node.body))
if node.orelse:
whiles = '%s\nelse:\n%s' % (whiles, self._stmt_list(node.orelse))
return whiles
def visit_with(self, node): # 'with' without 'as' is possible
"""return an astroid.With node as string"""
items = ', '.join(('(%s)' % expr.accept(self)) +
(vars and ' as (%s)' % (vars.accept(self)) or '')
for expr, vars in node.items)
return 'with %s:\n%s' % (items, self._stmt_list(node.body))
def visit_yield(self, node):
"""yield an ast.Yield node as string"""
yi_val = (" " + node.value.accept(self)) if node.value else ""
expr = 'yield' + yi_val
if node.parent.is_statement:
return expr
return "(%s)" % (expr,)
def visit_starred(self, node):
"""return Starred node as string"""
return "*" + node.value.accept(self)
# These aren't for real AST nodes, but for inference objects.
def visit_frozenset(self, node):
return node.parent.accept(self)
def visit_super(self, node):
return node.parent.accept(self)
def visit_uninferable(self, node):
return str(node)
class AsStringVisitor3(AsStringVisitor):
"""AsStringVisitor3 overwrites some AsStringVisitor methods"""
def visit_excepthandler(self, node):
if node.type:
if node.name:
excs = 'except %s as %s' % (node.type.accept(self),
node.name.accept(self))
else:
excs = 'except %s' % node.type.accept(self)
else:
excs = 'except'
return '%s:\n%s' % (excs, self._stmt_list(node.body))
def visit_nonlocal(self, node):
"""return an astroid.Nonlocal node as string"""
return 'nonlocal %s' % ', '.join(node.names)
def visit_raise(self, node):
"""return an astroid.Raise node as string"""
if node.exc:
if node.cause:
return 'raise %s from %s' % (node.exc.accept(self),
node.cause.accept(self))
return 'raise %s' % node.exc.accept(self)
return 'raise'
def visit_yieldfrom(self, node):
""" Return an astroid.YieldFrom node as string. """
yi_val = (" " + node.value.accept(self)) if node.value else ""
expr = 'yield from' + yi_val
if node.parent.is_statement:
return expr
return "(%s)" % (expr,)
def visit_asyncfunctiondef(self, node):
function = super(AsStringVisitor3, self).visit_functiondef(node)
return 'async ' + function.strip()
def visit_await(self, node):
return 'await %s' % node.value.accept(self)
def visit_asyncwith(self, node):
return 'async %s' % self.visit_with(node)
def visit_asyncfor(self, node):
return 'async %s' % self.visit_for(node)
def visit_joinedstr(self, node):
# Special treatment for constants,
# as we want to join literals not reprs
string = ''.join(
value.value if type(value).__name__ == 'Const'
else value.accept(self)
for value in node.values
)
return "f'%s'" % string
def visit_formattedvalue(self, node):
return '{%s}' % node.value.accept(self)
def visit_comprehension(self, node):
"""return an astroid.Comprehension node as string"""
return '%s%s' % ('async ' if node.is_async else '',
super(AsStringVisitor3, self).visit_comprehension(node))
def _import_string(names):
"""return a list of (name, asname) formatted as a string"""
_names = []
for name, asname in names:
if asname is not None:
_names.append('%s as %s' % (name, asname))
else:
_names.append(name)
return ', '.join(_names)
if sys.version_info >= (3, 0):
AsStringVisitor = AsStringVisitor3
# This sets the default indent to 4 spaces.
to_code = AsStringVisitor(' ')

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Small AST optimizations."""
import _ast
from astroid import nodes
__all__ = ('ASTPeepholeOptimizer', )
try:
_TYPES = (_ast.Str, _ast.Bytes)
except AttributeError:
_TYPES = (_ast.Str, )
class ASTPeepholeOptimizer(object):
"""Class for applying small optimizations to generate new AST."""
def optimize_binop(self, node, parent=None):
"""Optimize BinOps with string Const nodes on the lhs.
This fixes an infinite recursion crash, where multiple
strings are joined using the addition operator. With a
sufficient number of such strings, astroid will fail
with a maximum recursion limit exceeded. The
function will return a Const node with all the strings
already joined.
Return ``None`` if no AST node can be obtained
through optimization.
"""
ast_nodes = []
current = node
while isinstance(current, _ast.BinOp):
# lhs must be a BinOp with the addition operand.
if not isinstance(current.left, _ast.BinOp):
return None
if (not isinstance(current.left.op, _ast.Add)
or not isinstance(current.op, _ast.Add)):
return None
# rhs must a str / bytes.
if not isinstance(current.right, _TYPES):
return None
ast_nodes.append(current.right.s)
current = current.left
if (isinstance(current, _ast.BinOp)
and isinstance(current.left, _TYPES)
and isinstance(current.right, _TYPES)):
# Stop early if we are at the last BinOp in
# the operation
ast_nodes.append(current.right.s)
ast_nodes.append(current.left.s)
break
if not ast_nodes:
return None
# If we have inconsistent types, bail out.
known = type(ast_nodes[0])
if any(not isinstance(element, known)
for element in ast_nodes[1:]):
return None
value = known().join(reversed(ast_nodes))
newnode = nodes.Const(value, node.lineno, node.col_offset, parent)
return newnode

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# Copyright (c) 2009-2011, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2014 Google, Inc.
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""This module contains base classes and functions for the nodes and some
inference utils.
"""
import collections
import sys
import six
from astroid import context as contextmod
from astroid import exceptions
from astroid import util
objectmodel = util.lazy_import('interpreter.objectmodel')
BUILTINS = six.moves.builtins.__name__
manager = util.lazy_import('manager')
MANAGER = manager.AstroidManager()
if sys.version_info >= (3, 0):
BUILTINS = 'builtins'
BOOL_SPECIAL_METHOD = '__bool__'
else:
BUILTINS = '__builtin__'
BOOL_SPECIAL_METHOD = '__nonzero__'
PROPERTIES = {BUILTINS + '.property', 'abc.abstractproperty'}
# List of possible property names. We use this list in order
# to see if a method is a property or not. This should be
# pretty reliable and fast, the alternative being to check each
# decorator to see if its a real property-like descriptor, which
# can be too complicated.
# Also, these aren't qualified, because each project can
# define them, we shouldn't expect to know every possible
# property-like decorator!
# TODO(cpopa): just implement descriptors already.
POSSIBLE_PROPERTIES = {"cached_property", "cachedproperty",
"lazyproperty", "lazy_property", "reify",
"lazyattribute", "lazy_attribute",
"LazyProperty", "lazy"}
def _is_property(meth):
if PROPERTIES.intersection(meth.decoratornames()):
return True
stripped = {name.split(".")[-1] for name in meth.decoratornames()
if name is not util.Uninferable}
return any(name in stripped for name in POSSIBLE_PROPERTIES)
class Proxy(object):
"""a simple proxy object"""
_proxied = None # proxied object may be set by class or by instance
def __init__(self, proxied=None):
if proxied is not None:
self._proxied = proxied
def __getattr__(self, name):
if name == '_proxied':
return getattr(self.__class__, '_proxied')
if name in self.__dict__:
return self.__dict__[name]
return getattr(self._proxied, name)
def infer(self, context=None):
yield self
def _infer_stmts(stmts, context, frame=None):
"""Return an iterator on statements inferred by each statement in *stmts*."""
stmt = None
inferred = False
if context is not None:
name = context.lookupname
context = context.clone()
else:
name = None
context = contextmod.InferenceContext()
for stmt in stmts:
if stmt is util.Uninferable:
yield stmt
inferred = True
continue
context.lookupname = stmt._infer_name(frame, name)
try:
for inferred in stmt.infer(context=context):
yield inferred
inferred = True
except exceptions.NameInferenceError:
continue
except exceptions.InferenceError:
yield util.Uninferable
inferred = True
if not inferred:
raise exceptions.InferenceError(
'Inference failed for all members of {stmts!r}.',
stmts=stmts, frame=frame, context=context)
def _infer_method_result_truth(instance, method_name, context):
# Get the method from the instance and try to infer
# its return's truth value.
meth = next(instance.igetattr(method_name, context=context), None)
if meth and hasattr(meth, 'infer_call_result'):
if not meth.callable():
return util.Uninferable
for value in meth.infer_call_result(instance, context=context):
if value is util.Uninferable:
return value
inferred = next(value.infer(context=context))
return inferred.bool_value()
return util.Uninferable
class BaseInstance(Proxy):
"""An instance base class, which provides lookup methods for potential instances."""
special_attributes = None
def display_type(self):
return 'Instance of'
def getattr(self, name, context=None, lookupclass=True):
try:
values = self._proxied.instance_attr(name, context)
except exceptions.AttributeInferenceError:
if self.special_attributes and name in self.special_attributes:
return [self.special_attributes.lookup(name)]
if lookupclass:
# Class attributes not available through the instance
# unless they are explicitly defined.
return self._proxied.getattr(name, context,
class_context=False)
util.reraise(exceptions.AttributeInferenceError(target=self,
attribute=name,
context=context))
# since we've no context information, return matching class members as
# well
if lookupclass:
try:
return values + self._proxied.getattr(name, context,
class_context=False)
except exceptions.AttributeInferenceError:
pass
return values
def igetattr(self, name, context=None):
"""inferred getattr"""
if not context:
context = contextmod.InferenceContext()
try:
# avoid recursively inferring the same attr on the same class
if context.push((self._proxied, name)):
return
# XXX frame should be self._proxied, or not ?
get_attr = self.getattr(name, context, lookupclass=False)
for stmt in _infer_stmts(self._wrap_attr(get_attr, context),
context, frame=self):
yield stmt
except exceptions.AttributeInferenceError as error:
try:
# fallback to class.igetattr since it has some logic to handle
# descriptors
# But only if the _proxied is the Class.
if self._proxied.__class__.__name__ != 'ClassDef':
util.reraise(exceptions.InferenceError(**vars(error)))
attrs = self._proxied.igetattr(name, context, class_context=False)
for stmt in self._wrap_attr(attrs, context):
yield stmt
except exceptions.AttributeInferenceError as error:
util.reraise(exceptions.InferenceError(**vars(error)))
def _wrap_attr(self, attrs, context=None):
"""wrap bound methods of attrs in a InstanceMethod proxies"""
for attr in attrs:
if isinstance(attr, UnboundMethod):
if _is_property(attr):
for inferred in attr.infer_call_result(self, context):
yield inferred
else:
yield BoundMethod(attr, self)
elif hasattr(attr, 'name') and attr.name == '<lambda>':
# This is a lambda function defined at class level,
# since its scope is the underlying _proxied class.
# Unfortunately, we can't do an isinstance check here,
# because of the circular dependency between astroid.bases
# and astroid.scoped_nodes.
if attr.statement().scope() == self._proxied:
if attr.args.args and attr.args.args[0].name == 'self':
yield BoundMethod(attr, self)
continue
yield attr
else:
yield attr
def infer_call_result(self, caller, context=None):
"""infer what a class instance is returning when called"""
inferred = False
for node in self._proxied.igetattr('__call__', context):
if node is util.Uninferable or not node.callable():
continue
for res in node.infer_call_result(caller, context):
inferred = True
yield res
if not inferred:
raise exceptions.InferenceError(node=self, caller=caller,
context=context)
class Instance(BaseInstance):
"""A special node representing a class instance."""
# pylint: disable=unnecessary-lambda
special_attributes = util.lazy_descriptor(lambda: objectmodel.InstanceModel())
def __repr__(self):
return '<Instance of %s.%s at 0x%s>' % (self._proxied.root().name,
self._proxied.name,
id(self))
def __str__(self):
return 'Instance of %s.%s' % (self._proxied.root().name,
self._proxied.name)
def callable(self):
try:
self._proxied.getattr('__call__', class_context=False)
return True
except exceptions.AttributeInferenceError:
return False
def pytype(self):
return self._proxied.qname()
def display_type(self):
return 'Instance of'
def bool_value(self):
"""Infer the truth value for an Instance
The truth value of an instance is determined by these conditions:
* if it implements __bool__ on Python 3 or __nonzero__
on Python 2, then its bool value will be determined by
calling this special method and checking its result.
* when this method is not defined, __len__() is called, if it
is defined, and the object is considered true if its result is
nonzero. If a class defines neither __len__() nor __bool__(),
all its instances are considered true.
"""
context = contextmod.InferenceContext()
context.callcontext = contextmod.CallContext(args=[])
context.boundnode = self
try:
result = _infer_method_result_truth(self, BOOL_SPECIAL_METHOD, context)
except (exceptions.InferenceError, exceptions.AttributeInferenceError):
# Fallback to __len__.
try:
result = _infer_method_result_truth(self, '__len__', context)
except (exceptions.AttributeInferenceError, exceptions.InferenceError):
return True
return result
# TODO(cpopa): this is set in inference.py
# The circular dependency hell goes deeper and deeper.
def getitem(self, index, context=None):
pass
class UnboundMethod(Proxy):
"""a special node representing a method not bound to an instance"""
# pylint: disable=unnecessary-lambda
special_attributes = util.lazy_descriptor(lambda: objectmodel.UnboundMethodModel())
def __repr__(self):
frame = self._proxied.parent.frame()
return '<%s %s of %s at 0x%s' % (self.__class__.__name__,
self._proxied.name,
frame.qname(), id(self))
def is_bound(self):
return False
def getattr(self, name, context=None):
if name in self.special_attributes:
return [self.special_attributes.lookup(name)]
return self._proxied.getattr(name, context)
def igetattr(self, name, context=None):
if name in self.special_attributes:
return iter((self.special_attributes.lookup(name), ))
return self._proxied.igetattr(name, context)
def infer_call_result(self, caller, context):
# If we're unbound method __new__ of builtin object, the result is an
# instance of the class given as first argument.
if (self._proxied.name == '__new__' and
self._proxied.parent.frame().qname() == '%s.object' % BUILTINS):
infer = caller.args[0].infer() if caller.args else []
return (Instance(x) if x is not util.Uninferable else x for x in infer)
return self._proxied.infer_call_result(caller, context)
def bool_value(self):
return True
class BoundMethod(UnboundMethod):
"""a special node representing a method bound to an instance"""
# pylint: disable=unnecessary-lambda
special_attributes = util.lazy_descriptor(lambda: objectmodel.BoundMethodModel())
def __init__(self, proxy, bound):
UnboundMethod.__init__(self, proxy)
self.bound = bound
def is_bound(self):
return True
def _infer_type_new_call(self, caller, context):
"""Try to infer what type.__new__(mcs, name, bases, attrs) returns.
In order for such call to be valid, the metaclass needs to be
a subtype of ``type``, the name needs to be a string, the bases
needs to be a tuple of classes and the attributes a dictionary
of strings to values.
"""
from astroid import node_classes
# Verify the metaclass
mcs = next(caller.args[0].infer(context=context))
if mcs.__class__.__name__ != 'ClassDef':
# Not a valid first argument.
return None
if not mcs.is_subtype_of("%s.type" % BUILTINS):
# Not a valid metaclass.
return None
# Verify the name
name = next(caller.args[1].infer(context=context))
if name.__class__.__name__ != 'Const':
# Not a valid name, needs to be a const.
return None
if not isinstance(name.value, str):
# Needs to be a string.
return None
# Verify the bases
bases = next(caller.args[2].infer(context=context))
if bases.__class__.__name__ != 'Tuple':
# Needs to be a tuple.
return None
inferred_bases = [next(elt.infer(context=context))
for elt in bases.elts]
if any(base.__class__.__name__ != 'ClassDef'
for base in inferred_bases):
# All the bases needs to be Classes
return None
# Verify the attributes.
attrs = next(caller.args[3].infer(context=context))
if attrs.__class__.__name__ != 'Dict':
# Needs to be a dictionary.
return None
cls_locals = collections.defaultdict(list)
for key, value in attrs.items:
key = next(key.infer(context=context))
value = next(value.infer(context=context))
if key.__class__.__name__ != 'Const':
# Something invalid as an attribute.
return None
if not isinstance(key.value, str):
# Not a proper attribute.
return None
cls_locals[key.value].append(value)
# Build the class from now.
cls = mcs.__class__(name=name.value, lineno=caller.lineno,
col_offset=caller.col_offset,
parent=caller)
empty = node_classes.Pass()
cls.postinit(bases=bases.elts, body=[empty], decorators=[],
newstyle=True, metaclass=mcs, keywords=[])
cls.locals = cls_locals
return cls
def infer_call_result(self, caller, context=None):
if context is None:
context = contextmod.InferenceContext()
context = context.clone()
context.boundnode = self.bound
if (self.bound.__class__.__name__ == 'ClassDef'
and self.bound.name == 'type'
and self.name == '__new__'
and len(caller.args) == 4
# TODO(cpopa): this check shouldn't be needed.
and self._proxied.parent.frame().qname() == '%s.object' % BUILTINS):
# Check if we have an ``type.__new__(mcs, name, bases, attrs)`` call.
new_cls = self._infer_type_new_call(caller, context)
if new_cls:
return iter((new_cls, ))
return super(BoundMethod, self).infer_call_result(caller, context)
def bool_value(self):
return True
class Generator(BaseInstance):
"""a special node representing a generator.
Proxied class is set once for all in raw_building.
"""
# pylint: disable=unnecessary-lambda
special_attributes = util.lazy_descriptor(lambda: objectmodel.GeneratorModel())
# pylint: disable=super-init-not-called
def __init__(self, parent=None):
self.parent = parent
def callable(self):
return False
def pytype(self):
return '%s.generator' % BUILTINS
def display_type(self):
return 'Generator'
def bool_value(self):
return True
def __repr__(self):
return '<Generator(%s) l.%s at 0x%s>' % (self._proxied.name, self.lineno, id(self))
def __str__(self):
return 'Generator(%s)' % (self._proxied.name)

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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""
Astroid hook for the attrs library
Without this hook pylint reports unsupported-assignment-operation
for atrrs classes
"""
import astroid
from astroid import MANAGER
ATTR_IB = 'attr.ib'
def is_decorated_with_attrs(
node, decorator_names=('attr.s', 'attr.attrs', 'attr.attributes')):
"""Return True if a decorated node has
an attr decorator applied."""
if not node.decorators:
return False
for decorator_attribute in node.decorators.nodes:
if decorator_attribute.as_string() in decorator_names:
return True
return False
def attr_attributes_transform(node):
"""Given that the ClassNode has an attr decorator,
rewrite class attributes as instance attributes
"""
# Astroid can't infer this attribute properly
# Prevents https://github.com/PyCQA/pylint/issues/1884
node.locals["__attrs_attrs__"] = [astroid.Unknown(parent=node.body)]
for cdefbodynode in node.body:
if not isinstance(cdefbodynode, astroid.Assign):
continue
if isinstance(cdefbodynode.value, astroid.Call):
if cdefbodynode.value.func.as_string() != ATTR_IB:
continue
else:
continue
for target in cdefbodynode.targets:
rhs_node = astroid.Unknown(
lineno=cdefbodynode.lineno,
col_offset=cdefbodynode.col_offset,
parent=cdefbodynode
)
node.locals[target.name] = [rhs_node]
MANAGER.register_transform(
astroid.Class,
attr_attributes_transform,
is_decorated_with_attrs)

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# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for various builtins."""
from functools import partial
import sys
from textwrap import dedent
import six
from astroid import (MANAGER, UseInferenceDefault, AttributeInferenceError,
inference_tip, InferenceError, NameInferenceError)
from astroid import arguments
from astroid.builder import AstroidBuilder
from astroid import helpers
from astroid import nodes
from astroid import objects
from astroid import scoped_nodes
from astroid import util
OBJECT_DUNDER_NEW = 'object.__new__'
def _extend_str(class_node, rvalue):
"""function to extend builtin str/unicode class"""
# TODO(cpopa): this approach will make astroid to believe
# that some arguments can be passed by keyword, but
# unfortunately, strings and bytes don't accept keyword arguments.
code = dedent('''
class whatever(object):
def join(self, iterable):
return {rvalue}
def replace(self, old, new, count=None):
return {rvalue}
def format(self, *args, **kwargs):
return {rvalue}
def encode(self, encoding='ascii', errors=None):
return ''
def decode(self, encoding='ascii', errors=None):
return u''
def capitalize(self):
return {rvalue}
def title(self):
return {rvalue}
def lower(self):
return {rvalue}
def upper(self):
return {rvalue}
def swapcase(self):
return {rvalue}
def index(self, sub, start=None, end=None):
return 0
def find(self, sub, start=None, end=None):
return 0
def count(self, sub, start=None, end=None):
return 0
def strip(self, chars=None):
return {rvalue}
def lstrip(self, chars=None):
return {rvalue}
def rstrip(self, chars=None):
return {rvalue}
def rjust(self, width, fillchar=None):
return {rvalue}
def center(self, width, fillchar=None):
return {rvalue}
def ljust(self, width, fillchar=None):
return {rvalue}
''')
code = code.format(rvalue=rvalue)
fake = AstroidBuilder(MANAGER).string_build(code)['whatever']
for method in fake.mymethods():
class_node.locals[method.name] = [method]
method.parent = class_node
def extend_builtins(class_transforms):
from astroid.bases import BUILTINS
builtin_ast = MANAGER.astroid_cache[BUILTINS]
for class_name, transform in class_transforms.items():
transform(builtin_ast[class_name])
if sys.version_info > (3, 0):
extend_builtins({'bytes': partial(_extend_str, rvalue="b''"),
'str': partial(_extend_str, rvalue="''")})
else:
extend_builtins({'str': partial(_extend_str, rvalue="''"),
'unicode': partial(_extend_str, rvalue="u''")})
def register_builtin_transform(transform, builtin_name):
"""Register a new transform function for the given *builtin_name*.
The transform function must accept two parameters, a node and
an optional context.
"""
def _transform_wrapper(node, context=None):
result = transform(node, context=context)
if result:
if not result.parent:
# Let the transformation function determine
# the parent for its result. Otherwise,
# we set it to be the node we transformed from.
result.parent = node
result.lineno = node.lineno
result.col_offset = node.col_offset
return iter([result])
MANAGER.register_transform(nodes.Call,
inference_tip(_transform_wrapper),
lambda n: (isinstance(n.func, nodes.Name) and
n.func.name == builtin_name))
def _generic_inference(node, context, node_type, transform):
args = node.args
if not args:
return node_type()
if len(node.args) > 1:
raise UseInferenceDefault()
arg, = args
transformed = transform(arg)
if not transformed:
try:
inferred = next(arg.infer(context=context))
except (InferenceError, StopIteration):
raise UseInferenceDefault()
if inferred is util.Uninferable:
raise UseInferenceDefault()
transformed = transform(inferred)
if not transformed or transformed is util.Uninferable:
raise UseInferenceDefault()
return transformed
def _generic_transform(arg, klass, iterables, build_elts):
if isinstance(arg, klass):
return arg
elif isinstance(arg, iterables):
if not all(isinstance(elt, nodes.Const)
for elt in arg.elts):
# TODO(cpopa): Don't support heterogenous elements.
# Not yet, though.
raise UseInferenceDefault()
elts = [elt.value for elt in arg.elts]
elif isinstance(arg, nodes.Dict):
if not all(isinstance(elt[0], nodes.Const)
for elt in arg.items):
raise UseInferenceDefault()
elts = [item[0].value for item in arg.items]
elif (isinstance(arg, nodes.Const) and
isinstance(arg.value, (six.string_types, six.binary_type))):
elts = arg.value
else:
return
return klass.from_constants(elts=build_elts(elts))
def _infer_builtin(node, context,
klass=None, iterables=None,
build_elts=None):
transform_func = partial(
_generic_transform,
klass=klass,
iterables=iterables,
build_elts=build_elts)
return _generic_inference(node, context, klass, transform_func)
# pylint: disable=invalid-name
infer_tuple = partial(
_infer_builtin,
klass=nodes.Tuple,
iterables=(nodes.List, nodes.Set, objects.FrozenSet,
objects.DictItems, objects.DictKeys,
objects.DictValues),
build_elts=tuple)
infer_list = partial(
_infer_builtin,
klass=nodes.List,
iterables=(nodes.Tuple, nodes.Set, objects.FrozenSet,
objects.DictItems, objects.DictKeys,
objects.DictValues),
build_elts=list)
infer_set = partial(
_infer_builtin,
klass=nodes.Set,
iterables=(nodes.List, nodes.Tuple, objects.FrozenSet,
objects.DictKeys),
build_elts=set)
infer_frozenset = partial(
_infer_builtin,
klass=objects.FrozenSet,
iterables=(nodes.List, nodes.Tuple, nodes.Set, objects.FrozenSet,
objects.DictKeys),
build_elts=frozenset)
def _get_elts(arg, context):
is_iterable = lambda n: isinstance(n,
(nodes.List, nodes.Tuple, nodes.Set))
try:
inferred = next(arg.infer(context))
except (InferenceError, NameInferenceError):
raise UseInferenceDefault()
if isinstance(inferred, nodes.Dict):
items = inferred.items
elif is_iterable(inferred):
items = []
for elt in inferred.elts:
# If an item is not a pair of two items,
# then fallback to the default inference.
# Also, take in consideration only hashable items,
# tuples and consts. We are choosing Names as well.
if not is_iterable(elt):
raise UseInferenceDefault()
if len(elt.elts) != 2:
raise UseInferenceDefault()
if not isinstance(elt.elts[0],
(nodes.Tuple, nodes.Const, nodes.Name)):
raise UseInferenceDefault()
items.append(tuple(elt.elts))
else:
raise UseInferenceDefault()
return items
def infer_dict(node, context=None):
"""Try to infer a dict call to a Dict node.
The function treats the following cases:
* dict()
* dict(mapping)
* dict(iterable)
* dict(iterable, **kwargs)
* dict(mapping, **kwargs)
* dict(**kwargs)
If a case can't be inferred, we'll fallback to default inference.
"""
call = arguments.CallSite.from_call(node)
if call.has_invalid_arguments() or call.has_invalid_keywords():
raise UseInferenceDefault
args = call.positional_arguments
kwargs = list(call.keyword_arguments.items())
if not args and not kwargs:
# dict()
return nodes.Dict()
elif kwargs and not args:
# dict(a=1, b=2, c=4)
items = [(nodes.Const(key), value) for key, value in kwargs]
elif len(args) == 1 and kwargs:
# dict(some_iterable, b=2, c=4)
elts = _get_elts(args[0], context)
keys = [(nodes.Const(key), value) for key, value in kwargs]
items = elts + keys
elif len(args) == 1:
items = _get_elts(args[0], context)
else:
raise UseInferenceDefault()
value = nodes.Dict(col_offset=node.col_offset,
lineno=node.lineno,
parent=node.parent)
value.postinit(items)
return value
def infer_super(node, context=None):
"""Understand super calls.
There are some restrictions for what can be understood:
* unbounded super (one argument form) is not understood.
* if the super call is not inside a function (classmethod or method),
then the default inference will be used.
* if the super arguments can't be inferred, the default inference
will be used.
"""
if len(node.args) == 1:
# Ignore unbounded super.
raise UseInferenceDefault
scope = node.scope()
if not isinstance(scope, nodes.FunctionDef):
# Ignore non-method uses of super.
raise UseInferenceDefault
if scope.type not in ('classmethod', 'method'):
# Not interested in staticmethods.
raise UseInferenceDefault
cls = scoped_nodes.get_wrapping_class(scope)
if not len(node.args):
mro_pointer = cls
# In we are in a classmethod, the interpreter will fill
# automatically the class as the second argument, not an instance.
if scope.type == 'classmethod':
mro_type = cls
else:
mro_type = cls.instantiate_class()
else:
# TODO(cpopa): support flow control (multiple inference values).
try:
mro_pointer = next(node.args[0].infer(context=context))
except InferenceError:
raise UseInferenceDefault
try:
mro_type = next(node.args[1].infer(context=context))
except InferenceError:
raise UseInferenceDefault
if mro_pointer is util.Uninferable or mro_type is util.Uninferable:
# No way we could understand this.
raise UseInferenceDefault
super_obj = objects.Super(mro_pointer=mro_pointer,
mro_type=mro_type,
self_class=cls,
scope=scope)
super_obj.parent = node
return super_obj
def _infer_getattr_args(node, context):
if len(node.args) not in (2, 3):
# Not a valid getattr call.
raise UseInferenceDefault
try:
# TODO(cpopa): follow all the values of the first argument?
obj = next(node.args[0].infer(context=context))
attr = next(node.args[1].infer(context=context))
except InferenceError:
raise UseInferenceDefault
if obj is util.Uninferable or attr is util.Uninferable:
# If one of the arguments is something we can't infer,
# then also make the result of the getattr call something
# which is unknown.
return util.Uninferable, util.Uninferable
is_string = (isinstance(attr, nodes.Const) and
isinstance(attr.value, six.string_types))
if not is_string:
raise UseInferenceDefault
return obj, attr.value
def infer_getattr(node, context=None):
"""Understand getattr calls
If one of the arguments is an Uninferable object, then the
result will be an Uninferable object. Otherwise, the normal attribute
lookup will be done.
"""
obj, attr = _infer_getattr_args(node, context)
if obj is util.Uninferable or attr is util.Uninferable or not hasattr(obj, 'igetattr'):
return util.Uninferable
try:
return next(obj.igetattr(attr, context=context))
except (StopIteration, InferenceError, AttributeInferenceError):
if len(node.args) == 3:
# Try to infer the default and return it instead.
try:
return next(node.args[2].infer(context=context))
except InferenceError:
raise UseInferenceDefault
raise UseInferenceDefault
def infer_hasattr(node, context=None):
"""Understand hasattr calls
This always guarantees three possible outcomes for calling
hasattr: Const(False) when we are sure that the object
doesn't have the intended attribute, Const(True) when
we know that the object has the attribute and Uninferable
when we are unsure of the outcome of the function call.
"""
try:
obj, attr = _infer_getattr_args(node, context)
if obj is util.Uninferable or attr is util.Uninferable or not hasattr(obj, 'getattr'):
return util.Uninferable
obj.getattr(attr, context=context)
except UseInferenceDefault:
# Can't infer something from this function call.
return util.Uninferable
except AttributeInferenceError:
# Doesn't have it.
return nodes.Const(False)
return nodes.Const(True)
def infer_callable(node, context=None):
"""Understand callable calls
This follows Python's semantics, where an object
is callable if it provides an attribute __call__,
even though that attribute is something which can't be
called.
"""
if len(node.args) != 1:
# Invalid callable call.
raise UseInferenceDefault
argument = node.args[0]
try:
inferred = next(argument.infer(context=context))
except InferenceError:
return util.Uninferable
if inferred is util.Uninferable:
return util.Uninferable
return nodes.Const(inferred.callable())
def infer_bool(node, context=None):
"""Understand bool calls."""
if len(node.args) > 1:
# Invalid bool call.
raise UseInferenceDefault
if not node.args:
return nodes.Const(False)
argument = node.args[0]
try:
inferred = next(argument.infer(context=context))
except InferenceError:
return util.Uninferable
if inferred is util.Uninferable:
return util.Uninferable
bool_value = inferred.bool_value()
if bool_value is util.Uninferable:
return util.Uninferable
return nodes.Const(bool_value)
def infer_type(node, context=None):
"""Understand the one-argument form of *type*."""
if len(node.args) != 1:
raise UseInferenceDefault
return helpers.object_type(node.args[0], context)
def infer_slice(node, context=None):
"""Understand `slice` calls."""
args = node.args
if not 0 < len(args) <= 3:
raise UseInferenceDefault
args = list(map(helpers.safe_infer, args))
for arg in args:
if not arg or arg is util.Uninferable:
raise UseInferenceDefault
if not isinstance(arg, nodes.Const):
raise UseInferenceDefault
if not isinstance(arg.value, (type(None), int)):
raise UseInferenceDefault
if len(args) < 3:
# Make sure we have 3 arguments.
args.extend([None] * (3 - len(args)))
slice_node = nodes.Slice(lineno=node.lineno,
col_offset=node.col_offset,
parent=node.parent)
slice_node.postinit(*args)
return slice_node
def _infer_object__new__decorator(node, context=None):
# Instantiate class immediately
# since that's what @object.__new__ does
return iter((node.instantiate_class(),))
def _infer_object__new__decorator_check(node):
"""Predicate before inference_tip
Check if the given ClassDef has a @object.__new__ decorator
"""
if not node.decorators:
return False
for decorator in node.decorators.nodes:
if isinstance(decorator, nodes.Attribute):
if decorator.as_string() == OBJECT_DUNDER_NEW:
return True
return False
# Builtins inference
register_builtin_transform(infer_bool, 'bool')
register_builtin_transform(infer_super, 'super')
register_builtin_transform(infer_callable, 'callable')
register_builtin_transform(infer_getattr, 'getattr')
register_builtin_transform(infer_hasattr, 'hasattr')
register_builtin_transform(infer_tuple, 'tuple')
register_builtin_transform(infer_set, 'set')
register_builtin_transform(infer_list, 'list')
register_builtin_transform(infer_dict, 'dict')
register_builtin_transform(infer_frozenset, 'frozenset')
register_builtin_transform(infer_type, 'type')
register_builtin_transform(infer_slice, 'slice')
# Infer object.__new__ calls
MANAGER.register_transform(
nodes.ClassDef,
inference_tip(_infer_object__new__decorator),
_infer_object__new__decorator_check
)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import sys
import astroid
PY35 = sys.version_info >= (3, 5)
def _collections_transform():
return astroid.parse('''
class defaultdict(dict):
default_factory = None
def __missing__(self, key): pass
def __getitem__(self, key): return default_factory
''' + _deque_mock() + '''
class OrderedDict(dict):
def __reversed__(self): return self[::-1]
''')
def _deque_mock():
base_deque_class = '''
class deque(object):
maxlen = 0
def __init__(self, iterable=None, maxlen=None):
self.iterable = iterable
def append(self, x): pass
def appendleft(self, x): pass
def clear(self): pass
def count(self, x): return 0
def extend(self, iterable): pass
def extendleft(self, iterable): pass
def pop(self): pass
def popleft(self): pass
def remove(self, value): pass
def reverse(self): pass
def rotate(self, n=1): pass
def __iter__(self): return self
def __reversed__(self): return self.iterable[::-1]
def __getitem__(self, index): pass
def __setitem__(self, index, value): pass
def __delitem__(self, index): pass
def __bool__(self): return bool(self.iterable)
def __nonzero__(self): return bool(self.iterable)
def __contains__(self, o): return o in self.iterable
def __len__(self): return len(self.iterable)
def __copy__(self): return deque(self.iterable)'''
if PY35:
base_deque_class += '''
def copy(self): return deque(self.iterable)
def index(self, x, start=0, end=0): return 0
def insert(self, x, i): pass
def __add__(self, other): pass
def __iadd__(self, other): pass
def __mul__(self, other): pass
def __imul__(self, other): pass
def __rmul__(self, other): pass'''
return base_deque_class
astroid.register_module_extender(astroid.MANAGER, 'collections', _collections_transform)

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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import astroid
def _curses_transform():
return astroid.parse('''
A_ALTCHARSET = 1
A_BLINK = 1
A_BOLD = 1
A_DIM = 1
A_INVIS = 1
A_ITALIC = 1
A_NORMAL = 1
A_PROTECT = 1
A_REVERSE = 1
A_STANDOUT = 1
A_UNDERLINE = 1
A_HORIZONTAL = 1
A_LEFT = 1
A_LOW = 1
A_RIGHT = 1
A_TOP = 1
A_VERTICAL = 1
A_CHARTEXT = 1
A_ATTRIBUTES = 1
A_CHARTEXT = 1
A_COLOR = 1
KEY_MIN = 1
KEY_BREAK = 1
KEY_DOWN = 1
KEY_UP = 1
KEY_LEFT = 1
KEY_RIGHT = 1
KEY_HOME = 1
KEY_BACKSPACE = 1
KEY_F0 = 1
KEY_Fn = 1
KEY_DL = 1
KEY_IL = 1
KEY_DC = 1
KEY_IC = 1
KEY_EIC = 1
KEY_CLEAR = 1
KEY_EOS = 1
KEY_EOL = 1
KEY_SF = 1
KEY_SR = 1
KEY_NPAGE = 1
KEY_PPAGE = 1
KEY_STAB = 1
KEY_CTAB = 1
KEY_CATAB = 1
KEY_ENTER = 1
KEY_SRESET = 1
KEY_RESET = 1
KEY_PRINT = 1
KEY_LL = 1
KEY_A1 = 1
KEY_A3 = 1
KEY_B2 = 1
KEY_C1 = 1
KEY_C3 = 1
KEY_BTAB = 1
KEY_BEG = 1
KEY_CANCEL = 1
KEY_CLOSE = 1
KEY_COMMAND = 1
KEY_COPY = 1
KEY_CREATE = 1
KEY_END = 1
KEY_EXIT = 1
KEY_FIND = 1
KEY_HELP = 1
KEY_MARK = 1
KEY_MESSAGE = 1
KEY_MOVE = 1
KEY_NEXT = 1
KEY_OPEN = 1
KEY_OPTIONS = 1
KEY_PREVIOUS = 1
KEY_REDO = 1
KEY_REFERENCE = 1
KEY_REFRESH = 1
KEY_REPLACE = 1
KEY_RESTART = 1
KEY_RESUME = 1
KEY_SAVE = 1
KEY_SBEG = 1
KEY_SCANCEL = 1
KEY_SCOMMAND = 1
KEY_SCOPY = 1
KEY_SCREATE = 1
KEY_SDC = 1
KEY_SDL = 1
KEY_SELECT = 1
KEY_SEND = 1
KEY_SEOL = 1
KEY_SEXIT = 1
KEY_SFIND = 1
KEY_SHELP = 1
KEY_SHOME = 1
KEY_SIC = 1
KEY_SLEFT = 1
KEY_SMESSAGE = 1
KEY_SMOVE = 1
KEY_SNEXT = 1
KEY_SOPTIONS = 1
KEY_SPREVIOUS = 1
KEY_SPRINT = 1
KEY_SREDO = 1
KEY_SREPLACE = 1
KEY_SRIGHT = 1
KEY_SRSUME = 1
KEY_SSAVE = 1
KEY_SSUSPEND = 1
KEY_SUNDO = 1
KEY_SUSPEND = 1
KEY_UNDO = 1
KEY_MOUSE = 1
KEY_RESIZE = 1
KEY_MAX = 1
ACS_BBSS = 1
ACS_BLOCK = 1
ACS_BOARD = 1
ACS_BSBS = 1
ACS_BSSB = 1
ACS_BSSS = 1
ACS_BTEE = 1
ACS_BULLET = 1
ACS_CKBOARD = 1
ACS_DARROW = 1
ACS_DEGREE = 1
ACS_DIAMOND = 1
ACS_GEQUAL = 1
ACS_HLINE = 1
ACS_LANTERN = 1
ACS_LARROW = 1
ACS_LEQUAL = 1
ACS_LLCORNER = 1
ACS_LRCORNER = 1
ACS_LTEE = 1
ACS_NEQUAL = 1
ACS_PI = 1
ACS_PLMINUS = 1
ACS_PLUS = 1
ACS_RARROW = 1
ACS_RTEE = 1
ACS_S1 = 1
ACS_S3 = 1
ACS_S7 = 1
ACS_S9 = 1
ACS_SBBS = 1
ACS_SBSB = 1
ACS_SBSS = 1
ACS_SSBB = 1
ACS_SSBS = 1
ACS_SSSB = 1
ACS_SSSS = 1
ACS_STERLING = 1
ACS_TTEE = 1
ACS_UARROW = 1
ACS_ULCORNER = 1
ACS_URCORNER = 1
ACS_VLINE = 1
COLOR_BLACK = 1
COLOR_BLUE = 1
COLOR_CYAN = 1
COLOR_GREEN = 1
COLOR_MAGENTA = 1
COLOR_RED = 1
COLOR_WHITE = 1
COLOR_YELLOW = 1
''')
astroid.register_module_extender(astroid.MANAGER, 'curses', _curses_transform)

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for dateutil"""
import textwrap
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
def dateutil_transform():
return AstroidBuilder(MANAGER).string_build(textwrap.dedent('''
import datetime
def parse(timestr, parserinfo=None, **kwargs):
return datetime.datetime()
'''))
register_module_extender(MANAGER, 'dateutil.parser', dateutil_transform)

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# Copyright (c) 2017 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import sys
import astroid
def _clone_node_with_lineno(node, parent, lineno):
cls = node.__class__
other_fields = node._other_fields
_astroid_fields = node._astroid_fields
init_params = {
'lineno': lineno,
'col_offset': node.col_offset,
'parent': parent
}
postinit_params = {
param: getattr(node, param)
for param in _astroid_fields
}
if other_fields:
init_params.update({
param: getattr(node, param)
for param in other_fields
})
new_node = cls(**init_params)
if hasattr(node, 'postinit') and _astroid_fields:
new_node.postinit(**postinit_params)
return new_node
def _transform_formatted_value(node):
if node.value and node.value.lineno == 1:
if node.lineno != node.value.lineno:
new_node = astroid.FormattedValue(
lineno=node.lineno,
col_offset=node.col_offset,
parent=node.parent
)
new_value = _clone_node_with_lineno(
node=node.value,
lineno=node.lineno,
parent=new_node
)
new_node.postinit(value=new_value,
format_spec=node.format_spec)
return new_node
if sys.version_info[:2] >= (3, 6):
# TODO: this fix tries to *patch* http://bugs.python.org/issue29051
# The problem is that FormattedValue.value, which is a Name node,
# has wrong line numbers, usually 1. This creates problems for pylint,
# which expects correct line numbers for things such as message control.
astroid.MANAGER.register_transform(
astroid.FormattedValue,
_transform_formatted_value)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
"""Astroid hooks for understanding functools library module."""
import astroid
from astroid import BoundMethod
from astroid import extract_node
from astroid import helpers
from astroid.interpreter import objectmodel
from astroid import MANAGER
LRU_CACHE = 'functools.lru_cache'
class LruWrappedModel(objectmodel.FunctionModel):
"""Special attribute model for functions decorated with functools.lru_cache.
The said decorators patches at decoration time some functions onto
the decorated function.
"""
@property
def py__wrapped__(self):
return self._instance
@property
def pycache_info(self):
cache_info = extract_node('''
from functools import _CacheInfo
_CacheInfo(0, 0, 0, 0)
''')
class CacheInfoBoundMethod(BoundMethod):
def infer_call_result(self, caller, context=None):
yield helpers.safe_infer(cache_info)
return CacheInfoBoundMethod(proxy=self._instance, bound=self._instance)
@property
def pycache_clear(self):
node = extract_node('''def cache_clear(self): pass''')
return BoundMethod(proxy=node, bound=self._instance.parent.scope())
def _transform_lru_cache(node, context=None):
# TODO: this is not ideal, since the node should be immutable,
# but due to https://github.com/PyCQA/astroid/issues/354,
# there's not much we can do now.
# Replacing the node would work partially, because,
# in pylint, the old node would still be available, leading
# to spurious false positives.
node.special_attributes = LruWrappedModel()(node)
return
def _looks_like_lru_cache(node):
"""Check if the given function node is decorated with lru_cache."""
if not node.decorators:
return False
for decorator in node.decorators.nodes:
if not isinstance(decorator, astroid.Call):
continue
func = helpers.safe_infer(decorator.func)
if func in (None, astroid.Uninferable):
continue
if isinstance(func, astroid.FunctionDef) and func.qname() == LRU_CACHE:
return True
return False
MANAGER.register_transform(astroid.FunctionDef, _transform_lru_cache,
_looks_like_lru_cache)

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for the Python 2 GObject introspection bindings.
Helps with understanding everything imported from 'gi.repository'
"""
import inspect
import itertools
import sys
import re
import warnings
from astroid import MANAGER, AstroidBuildingError, nodes
from astroid.builder import AstroidBuilder
_inspected_modules = {}
_identifier_re = r'^[A-Za-z_]\w*$'
def _gi_build_stub(parent):
"""
Inspect the passed module recursively and build stubs for functions,
classes, etc.
"""
classes = {}
functions = {}
constants = {}
methods = {}
for name in dir(parent):
if name.startswith("__"):
continue
# Check if this is a valid name in python
if not re.match(_identifier_re, name):
continue
try:
obj = getattr(parent, name)
except:
continue
if inspect.isclass(obj):
classes[name] = obj
elif (inspect.isfunction(obj) or
inspect.isbuiltin(obj)):
functions[name] = obj
elif (inspect.ismethod(obj) or
inspect.ismethoddescriptor(obj)):
methods[name] = obj
elif (str(obj).startswith("<flags") or
str(obj).startswith("<enum ") or
str(obj).startswith("<GType ") or
inspect.isdatadescriptor(obj)):
constants[name] = 0
elif isinstance(obj, (int, str)):
constants[name] = obj
elif callable(obj):
# Fall back to a function for anything callable
functions[name] = obj
else:
# Assume everything else is some manner of constant
constants[name] = 0
ret = ""
if constants:
ret += "# %s constants\n\n" % parent.__name__
for name in sorted(constants):
if name[0].isdigit():
# GDK has some busted constant names like
# Gdk.EventType.2BUTTON_PRESS
continue
val = constants[name]
strval = str(val)
if isinstance(val, str):
strval = '"%s"' % str(val).replace("\\", "\\\\")
ret += "%s = %s\n" % (name, strval)
if ret:
ret += "\n\n"
if functions:
ret += "# %s functions\n\n" % parent.__name__
for name in sorted(functions):
ret += "def %s(*args, **kwargs):\n" % name
ret += " pass\n"
if ret:
ret += "\n\n"
if methods:
ret += "# %s methods\n\n" % parent.__name__
for name in sorted(methods):
ret += "def %s(self, *args, **kwargs):\n" % name
ret += " pass\n"
if ret:
ret += "\n\n"
if classes:
ret += "# %s classes\n\n" % parent.__name__
for name in sorted(classes):
ret += "class %s(object):\n" % name
classret = _gi_build_stub(classes[name])
if not classret:
classret = "pass\n"
for line in classret.splitlines():
ret += " " + line + "\n"
ret += "\n"
return ret
def _import_gi_module(modname):
# we only consider gi.repository submodules
if not modname.startswith('gi.repository.'):
raise AstroidBuildingError(modname=modname)
# build astroid representation unless we already tried so
if modname not in _inspected_modules:
modnames = [modname]
optional_modnames = []
# GLib and GObject may have some special case handling
# in pygobject that we need to cope with. However at
# least as of pygobject3-3.13.91 the _glib module doesn't
# exist anymore, so if treat these modules as optional.
if modname == 'gi.repository.GLib':
optional_modnames.append('gi._glib')
elif modname == 'gi.repository.GObject':
optional_modnames.append('gi._gobject')
try:
modcode = ''
for m in itertools.chain(modnames, optional_modnames):
try:
with warnings.catch_warnings():
# Just inspecting the code can raise gi deprecation
# warnings, so ignore them.
try:
from gi import PyGIDeprecationWarning, PyGIWarning
warnings.simplefilter("ignore", PyGIDeprecationWarning)
warnings.simplefilter("ignore", PyGIWarning)
except Exception:
pass
__import__(m)
modcode += _gi_build_stub(sys.modules[m])
except ImportError:
if m not in optional_modnames:
raise
except ImportError:
astng = _inspected_modules[modname] = None
else:
astng = AstroidBuilder(MANAGER).string_build(modcode, modname)
_inspected_modules[modname] = astng
else:
astng = _inspected_modules[modname]
if astng is None:
raise AstroidBuildingError(modname=modname)
return astng
def _looks_like_require_version(node):
# Return whether this looks like a call to gi.require_version(<name>, <version>)
# Only accept function calls with two constant arguments
if len(node.args) != 2:
return False
if not all(isinstance(arg, nodes.Const) for arg in node.args):
return False
func = node.func
if isinstance(func, nodes.Attribute):
if func.attrname != 'require_version':
return False
if isinstance(func.expr, nodes.Name) and func.expr.name == 'gi':
return True
return False
if isinstance(func, nodes.Name):
return func.name == 'require_version'
return False
def _register_require_version(node):
# Load the gi.require_version locally
try:
import gi
gi.require_version(node.args[0].value, node.args[1].value)
except Exception:
pass
return node
MANAGER.register_failed_import_hook(_import_gi_module)
MANAGER.register_transform(nodes.Call, _register_require_version, _looks_like_require_version)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import six
import astroid
def _hashlib_transform():
template = '''
class %(name)s(object):
def __init__(self, value=''): pass
def digest(self):
return %(digest)s
def copy(self):
return self
def update(self, value): pass
def hexdigest(self):
return ''
@property
def name(self):
return %(name)r
@property
def block_size(self):
return 1
@property
def digest_size(self):
return 1
'''
algorithms = ('md5', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512')
classes = "".join(
template % {'name': hashfunc, 'digest': 'b""' if six.PY3 else '""'}
for hashfunc in algorithms)
return astroid.parse(classes)
astroid.register_module_extender(astroid.MANAGER, 'hashlib', _hashlib_transform)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
'''Astroid brain hints for some of the _io C objects.'''
import astroid
BUFFERED = {'BufferedWriter', 'BufferedReader'}
TextIOWrapper = 'TextIOWrapper'
FileIO = 'FileIO'
BufferedWriter = 'BufferedWriter'
def _generic_io_transform(node, name, cls):
'''Transform the given name, by adding the given *class* as a member of the node.'''
io_module = astroid.MANAGER.ast_from_module_name('_io')
attribute_object = io_module[cls]
instance = attribute_object.instantiate_class()
node.locals[name] = [instance]
def _transform_text_io_wrapper(node):
# This is not always correct, since it can vary with the type of the descriptor,
# being stdout, stderr or stdin. But we cannot get access to the name of the
# stream, which is why we are using the BufferedWriter class as a default
# value
return _generic_io_transform(node, name='buffer', cls=BufferedWriter)
def _transform_buffered(node):
return _generic_io_transform(node, name='raw', cls=FileIO)
astroid.MANAGER.register_transform(astroid.ClassDef,
_transform_buffered,
lambda node: node.name in BUFFERED)
astroid.MANAGER.register_transform(astroid.ClassDef,
_transform_text_io_wrapper,
lambda node: node.name == TextIOWrapper)

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
def mechanize_transform():
return AstroidBuilder(MANAGER).string_build('''
class Browser(object):
def open(self, url, data=None, timeout=None):
return None
def open_novisit(self, url, data=None, timeout=None):
return None
def open_local_file(self, filename):
return None
''')
register_module_extender(MANAGER, 'mechanize', mechanize_transform)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import sys
import astroid
from astroid import exceptions
PY34 = sys.version_info >= (3, 4)
def _multiprocessing_transform():
module = astroid.parse('''
from multiprocessing.managers import SyncManager
def Manager():
return SyncManager()
''')
if not PY34:
return module
# On Python 3.4, multiprocessing uses a getattr lookup inside contexts,
# in order to get the attributes they need. Since it's extremely
# dynamic, we use this approach to fake it.
node = astroid.parse('''
from multiprocessing.context import DefaultContext, BaseContext
default = DefaultContext()
base = BaseContext()
''')
try:
context = next(node['default'].infer())
base = next(node['base'].infer())
except exceptions.InferenceError:
return module
for node in (context, base):
for key, value in node.locals.items():
if key.startswith("_"):
continue
value = value[0]
if isinstance(value, astroid.FunctionDef):
# We need to rebound this, since otherwise
# it will have an extra argument (self).
value = astroid.BoundMethod(value, node)
module[key] = value
return module
def _multiprocessing_managers_transform():
return astroid.parse('''
import array
import threading
import multiprocessing.pool as pool
import six
class Namespace(object):
pass
class Value(object):
def __init__(self, typecode, value, lock=True):
self._typecode = typecode
self._value = value
def get(self):
return self._value
def set(self, value):
self._value = value
def __repr__(self):
return '%s(%r, %r)'%(type(self).__name__, self._typecode, self._value)
value = property(get, set)
def Array(typecode, sequence, lock=True):
return array.array(typecode, sequence)
class SyncManager(object):
Queue = JoinableQueue = six.moves.queue.Queue
Event = threading.Event
RLock = threading.RLock
BoundedSemaphore = threading.BoundedSemaphore
Condition = threading.Condition
Barrier = threading.Barrier
Pool = pool.Pool
list = list
dict = dict
Value = Value
Array = Array
Namespace = Namespace
__enter__ = lambda self: self
__exit__ = lambda *args: args
def start(self, initializer=None, initargs=None):
pass
def shutdown(self):
pass
''')
astroid.register_module_extender(astroid.MANAGER, 'multiprocessing.managers',
_multiprocessing_managers_transform)
astroid.register_module_extender(astroid.MANAGER, 'multiprocessing',
_multiprocessing_transform)

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# Copyright (c) 2012-2015 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for the Python standard library."""
import functools
import sys
import keyword
from textwrap import dedent
from astroid import (
MANAGER, UseInferenceDefault, inference_tip,
InferenceError)
from astroid import arguments
from astroid import exceptions
from astroid import nodes
from astroid.builder import AstroidBuilder, extract_node
from astroid import util
def _infer_first(node, context):
if node is util.Uninferable:
raise UseInferenceDefault
try:
value = next(node.infer(context=context))
if value is util.Uninferable:
raise UseInferenceDefault()
else:
return value
except StopIteration:
raise InferenceError()
def _find_func_form_arguments(node, context):
def _extract_namedtuple_arg_or_keyword(position, key_name=None):
if len(args) > position:
return _infer_first(args[position], context)
if key_name and key_name in found_keywords:
return _infer_first(found_keywords[key_name], context)
args = node.args
keywords = node.keywords
found_keywords = {
keyword.arg: keyword.value for keyword in keywords
} if keywords else {}
name = _extract_namedtuple_arg_or_keyword(
position=0,
key_name='typename'
)
names = _extract_namedtuple_arg_or_keyword(
position=1,
key_name='field_names'
)
if name and names:
return name.value, names
raise UseInferenceDefault()
def infer_func_form(node, base_type, context=None, enum=False):
"""Specific inference function for namedtuple or Python 3 enum. """
# node is a Call node, class name as first argument and generated class
# attributes as second argument
# namedtuple or enums list of attributes can be a list of strings or a
# whitespace-separate string
try:
name, names = _find_func_form_arguments(node, context)
try:
attributes = names.value.replace(',', ' ').split()
except AttributeError:
if not enum:
attributes = [_infer_first(const, context).value
for const in names.elts]
else:
# Enums supports either iterator of (name, value) pairs
# or mappings.
# TODO: support only list, tuples and mappings.
if hasattr(names, 'items') and isinstance(names.items, list):
attributes = [_infer_first(const[0], context).value
for const in names.items
if isinstance(const[0], nodes.Const)]
elif hasattr(names, 'elts'):
# Enums can support either ["a", "b", "c"]
# or [("a", 1), ("b", 2), ...], but they can't
# be mixed.
if all(isinstance(const, nodes.Tuple)
for const in names.elts):
attributes = [_infer_first(const.elts[0], context).value
for const in names.elts
if isinstance(const, nodes.Tuple)]
else:
attributes = [_infer_first(const, context).value
for const in names.elts]
else:
raise AttributeError
if not attributes:
raise AttributeError
except (AttributeError, exceptions.InferenceError):
raise UseInferenceDefault()
# If we can't infer the name of the class, don't crash, up to this point
# we know it is a namedtuple anyway.
name = name or 'Uninferable'
# we want to return a Class node instance with proper attributes set
class_node = nodes.ClassDef(name, 'docstring')
class_node.parent = node.parent
# set base class=tuple
class_node.bases.append(base_type)
# XXX add __init__(*attributes) method
for attr in attributes:
fake_node = nodes.EmptyNode()
fake_node.parent = class_node
fake_node.attrname = attr
class_node.instance_attrs[attr] = [fake_node]
return class_node, name, attributes
def _looks_like(node, name):
func = node.func
if isinstance(func, nodes.Attribute):
return func.attrname == name
if isinstance(func, nodes.Name):
return func.name == name
return False
_looks_like_namedtuple = functools.partial(_looks_like, name='namedtuple')
_looks_like_enum = functools.partial(_looks_like, name='Enum')
def infer_named_tuple(node, context=None):
"""Specific inference function for namedtuple Call node"""
class_node, name, attributes = infer_func_form(node, nodes.Tuple._proxied,
context=context)
call_site = arguments.CallSite.from_call(node)
func = next(extract_node('import collections; collections.namedtuple').infer())
try:
rename = next(call_site.infer_argument(func, 'rename', context)).bool_value()
except InferenceError:
rename = False
if rename:
attributes = _get_renamed_namedtuple_atributes(attributes)
replace_args = ', '.join(
'{arg}=None'.format(arg=arg)
for arg in attributes
)
field_def = (" {name} = property(lambda self: self[{index:d}], "
"doc='Alias for field number {index:d}')")
field_defs = '\n'.join(field_def.format(name=name, index=index)
for index, name in enumerate(attributes))
fake = AstroidBuilder(MANAGER).string_build('''
class %(name)s(tuple):
__slots__ = ()
_fields = %(fields)r
def _asdict(self):
return self.__dict__
@classmethod
def _make(cls, iterable, new=tuple.__new__, len=len):
return new(cls, iterable)
def _replace(self, %(replace_args)s):
return self
def __getnewargs__(self):
return tuple(self)
%(field_defs)s
''' % {'name': name,
'fields': attributes,
'field_defs': field_defs,
'replace_args': replace_args})
class_node.locals['_asdict'] = fake.body[0].locals['_asdict']
class_node.locals['_make'] = fake.body[0].locals['_make']
class_node.locals['_replace'] = fake.body[0].locals['_replace']
class_node.locals['_fields'] = fake.body[0].locals['_fields']
for attr in attributes:
class_node.locals[attr] = fake.body[0].locals[attr]
# we use UseInferenceDefault, we can't be a generator so return an iterator
return iter([class_node])
def _get_renamed_namedtuple_atributes(field_names):
names = list(field_names)
seen = set()
for i, name in enumerate(field_names):
if (not all(c.isalnum() or c == '_' for c in name) or keyword.iskeyword(name)
or not name or name[0].isdigit() or name.startswith('_') or name in seen):
names[i] = '_%d' % i
seen.add(name)
return tuple(names)
def infer_enum(node, context=None):
""" Specific inference function for enum Call node. """
enum_meta = extract_node('''
class EnumMeta(object):
'docstring'
def __call__(self, node):
class EnumAttribute(object):
name = ''
value = 0
return EnumAttribute()
def __iter__(self):
class EnumAttribute(object):
name = ''
value = 0
return [EnumAttribute()]
def __next__(self):
return next(iter(self))
def __getitem__(self, attr):
class Value(object):
@property
def name(self):
return ''
@property
def value(self):
return attr
return Value()
__members__ = ['']
''')
class_node = infer_func_form(node, enum_meta,
context=context, enum=True)[0]
return iter([class_node.instantiate_class()])
def infer_enum_class(node):
""" Specific inference for enums. """
names = set(('Enum', 'IntEnum', 'enum.Enum', 'enum.IntEnum'))
for basename in node.basenames:
# TODO: doesn't handle subclasses yet. This implementation
# is a hack to support enums.
if basename not in names:
continue
if node.root().name == 'enum':
# Skip if the class is directly from enum module.
break
for local, values in node.locals.items():
if any(not isinstance(value, nodes.AssignName)
for value in values):
continue
stmt = values[0].statement()
if isinstance(stmt, nodes.Assign):
if isinstance(stmt.targets[0], nodes.Tuple):
targets = stmt.targets[0].itered()
else:
targets = stmt.targets
elif isinstance(stmt, nodes.AnnAssign):
targets = [stmt.target]
new_targets = []
for target in targets:
# Replace all the assignments with our mocked class.
classdef = dedent('''
class %(name)s(%(types)s):
@property
def value(self):
# Not the best return.
return None
@property
def name(self):
return %(name)r
''' % {'name': target.name, 'types': ', '.join(node.basenames)})
fake = AstroidBuilder(MANAGER).string_build(classdef)[target.name]
fake.parent = target.parent
for method in node.mymethods():
fake.locals[method.name] = [method]
new_targets.append(fake.instantiate_class())
node.locals[local] = new_targets
break
return node
MANAGER.register_transform(nodes.Call, inference_tip(infer_named_tuple),
_looks_like_namedtuple)
MANAGER.register_transform(nodes.Call, inference_tip(infer_enum),
_looks_like_enum)
MANAGER.register_transform(nodes.ClassDef, infer_enum_class)

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Hooks for nose library."""
import re
import textwrap
import astroid
import astroid.builder
_BUILDER = astroid.builder.AstroidBuilder(astroid.MANAGER)
def _pep8(name, caps=re.compile('([A-Z])')):
return caps.sub(lambda m: '_' + m.groups()[0].lower(), name)
def _nose_tools_functions():
"""Get an iterator of names and bound methods."""
module = _BUILDER.string_build(textwrap.dedent('''
import unittest
class Test(unittest.TestCase):
pass
a = Test()
'''))
try:
case = next(module['a'].infer())
except astroid.InferenceError:
return
for method in case.methods():
if method.name.startswith('assert') and '_' not in method.name:
pep8_name = _pep8(method.name)
yield pep8_name, astroid.BoundMethod(method, case)
if method.name == 'assertEqual':
# nose also exports assert_equals.
yield 'assert_equals', astroid.BoundMethod(method, case)
def _nose_tools_transform(node):
for method_name, method in _nose_tools_functions():
node.locals[method_name] = [method]
def _nose_tools_trivial_transform():
"""Custom transform for the nose.tools module."""
stub = _BUILDER.string_build('''__all__ = []''')
all_entries = ['ok_', 'eq_']
for pep8_name, method in _nose_tools_functions():
all_entries.append(pep8_name)
stub[pep8_name] = method
# Update the __all__ variable, since nose.tools
# does this manually with .append.
all_assign = stub['__all__'].parent
all_object = astroid.List(all_entries)
all_object.parent = all_assign
all_assign.value = all_object
return stub
astroid.register_module_extender(astroid.MANAGER, 'nose.tools.trivial',
_nose_tools_trivial_transform)
astroid.MANAGER.register_transform(astroid.Module, _nose_tools_transform,
lambda n: n.name == 'nose.tools')

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for numpy."""
import astroid
def numpy_random_mtrand_transform():
return astroid.parse('''
def beta(a, b, size=None): pass
def binomial(n, p, size=None): pass
def bytes(length): pass
def chisquare(df, size=None): pass
def choice(a, size=None, replace=True, p=None): pass
def dirichlet(alpha, size=None): pass
def exponential(scale=1.0, size=None): pass
def f(dfnum, dfden, size=None): pass
def gamma(shape, scale=1.0, size=None): pass
def geometric(p, size=None): pass
def get_state(): pass
def gumbel(loc=0.0, scale=1.0, size=None): pass
def hypergeometric(ngood, nbad, nsample, size=None): pass
def laplace(loc=0.0, scale=1.0, size=None): pass
def logistic(loc=0.0, scale=1.0, size=None): pass
def lognormal(mean=0.0, sigma=1.0, size=None): pass
def logseries(p, size=None): pass
def multinomial(n, pvals, size=None): pass
def multivariate_normal(mean, cov, size=None): pass
def negative_binomial(n, p, size=None): pass
def noncentral_chisquare(df, nonc, size=None): pass
def noncentral_f(dfnum, dfden, nonc, size=None): pass
def normal(loc=0.0, scale=1.0, size=None): pass
def pareto(a, size=None): pass
def permutation(x): pass
def poisson(lam=1.0, size=None): pass
def power(a, size=None): pass
def rand(*args): pass
def randint(low, high=None, size=None, dtype='l'): pass
def randn(*args): pass
def random_integers(low, high=None, size=None): pass
def random_sample(size=None): pass
def rayleigh(scale=1.0, size=None): pass
def seed(seed=None): pass
def set_state(state): pass
def shuffle(x): pass
def standard_cauchy(size=None): pass
def standard_exponential(size=None): pass
def standard_gamma(shape, size=None): pass
def standard_normal(size=None): pass
def standard_t(df, size=None): pass
def triangular(left, mode, right, size=None): pass
def uniform(low=0.0, high=1.0, size=None): pass
def vonmises(mu, kappa, size=None): pass
def wald(mean, scale, size=None): pass
def weibull(a, size=None): pass
def zipf(a, size=None): pass
''')
def numpy_core_umath_transform():
ufunc_optional_keyword_arguments = ("""out=None, where=True, casting='same_kind', order='K', """
"""dtype=None, subok=True""")
return astroid.parse('''
# Constants
e = 2.718281828459045
euler_gamma = 0.5772156649015329
# No arg functions
def geterrobj(): pass
# One arg functions
def seterrobj(errobj): pass
# One arg functions with optional kwargs
def arccos(x, {opt_args:s}): pass
def arccosh(x, {opt_args:s}): pass
def arcsin(x, {opt_args:s}): pass
def arcsinh(x, {opt_args:s}): pass
def arctan(x, {opt_args:s}): pass
def arctanh(x, {opt_args:s}): pass
def cbrt(x, {opt_args:s}): pass
def conj(x, {opt_args:s}): pass
def conjugate(x, {opt_args:s}): pass
def cosh(x, {opt_args:s}): pass
def deg2rad(x, {opt_args:s}): pass
def degrees(x, {opt_args:s}): pass
def exp2(x, {opt_args:s}): pass
def expm1(x, {opt_args:s}): pass
def fabs(x, {opt_args:s}): pass
def frexp(x, {opt_args:s}): pass
def isfinite(x, {opt_args:s}): pass
def isinf(x, {opt_args:s}): pass
def log(x, {opt_args:s}): pass
def log1p(x, {opt_args:s}): pass
def log2(x, {opt_args:s}): pass
def logical_not(x, {opt_args:s}): pass
def modf(x, {opt_args:s}): pass
def negative(x, {opt_args:s}): pass
def rad2deg(x, {opt_args:s}): pass
def radians(x, {opt_args:s}): pass
def reciprocal(x, {opt_args:s}): pass
def rint(x, {opt_args:s}): pass
def sign(x, {opt_args:s}): pass
def signbit(x, {opt_args:s}): pass
def sinh(x, {opt_args:s}): pass
def spacing(x, {opt_args:s}): pass
def square(x, {opt_args:s}): pass
def tan(x, {opt_args:s}): pass
def tanh(x, {opt_args:s}): pass
def trunc(x, {opt_args:s}): pass
# Two args functions with optional kwargs
def bitwise_and(x1, x2, {opt_args:s}): pass
def bitwise_or(x1, x2, {opt_args:s}): pass
def bitwise_xor(x1, x2, {opt_args:s}): pass
def copysign(x1, x2, {opt_args:s}): pass
def divide(x1, x2, {opt_args:s}): pass
def equal(x1, x2, {opt_args:s}): pass
def float_power(x1, x2, {opt_args:s}): pass
def floor_divide(x1, x2, {opt_args:s}): pass
def fmax(x1, x2, {opt_args:s}): pass
def fmin(x1, x2, {opt_args:s}): pass
def fmod(x1, x2, {opt_args:s}): pass
def greater(x1, x2, {opt_args:s}): pass
def hypot(x1, x2, {opt_args:s}): pass
def ldexp(x1, x2, {opt_args:s}): pass
def left_shift(x1, x2, {opt_args:s}): pass
def less(x1, x2, {opt_args:s}): pass
def logaddexp(x1, x2, {opt_args:s}): pass
def logaddexp2(x1, x2, {opt_args:s}): pass
def logical_and(x1, x2, {opt_args:s}): pass
def logical_or(x1, x2, {opt_args:s}): pass
def logical_xor(x1, x2, {opt_args:s}): pass
def maximum(x1, x2, {opt_args:s}): pass
def minimum(x1, x2, {opt_args:s}): pass
def nextafter(x1, x2, {opt_args:s}): pass
def not_equal(x1, x2, {opt_args:s}): pass
def power(x1, x2, {opt_args:s}): pass
def remainder(x1, x2, {opt_args:s}): pass
def right_shift(x1, x2, {opt_args:s}): pass
def subtract(x1, x2, {opt_args:s}): pass
def true_divide(x1, x2, {opt_args:s}): pass
'''.format(opt_args=ufunc_optional_keyword_arguments))
def numpy_core_numerictypes_transform():
return astroid.parse('''
# different types defined in numerictypes.py
uint16 = type('uint16')
uint32 = type('uint32')
uint64 = type('uint64')
int128 = type('int128')
uint128 = type('uint128')
float16 = type('float16')
float32 = type('float32')
float64 = type('float64')
float80 = type('float80')
float96 = type('float96')
float128 = type('float128')
float256 = type('float256')
complex32 = type('complex32')
complex64 = type('complex64')
complex128 = type('complex128')
complex160 = type('complex160')
complex192 = type('complex192')
complex256 = type('complex256')
complex512 = type('complex512')
timedelta64 = type('timedelta64')
datetime64 = type('datetime64')
unicode_ = type('unicode_')
string_ = type('string_')
object_ = type('object_')
''')
def numpy_funcs():
return astroid.parse('''
import builtins
def sum(a, axis=None, dtype=None, out=None, keepdims=None):
return builtins.sum(a)
''')
astroid.register_module_extender(astroid.MANAGER, 'numpy.core.umath', numpy_core_umath_transform)
astroid.register_module_extender(astroid.MANAGER, 'numpy.random.mtrand',
numpy_random_mtrand_transform)
astroid.register_module_extender(astroid.MANAGER, 'numpy.core.numerictypes',
numpy_core_numerictypes_transform)
astroid.register_module_extender(astroid.MANAGER, 'numpy', numpy_funcs)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import astroid
from astroid import parse
from astroid import inference_tip
from astroid import register_module_extender
from astroid import MANAGER
def pkg_resources_transform():
return parse('''
def require(*requirements):
return pkg_resources.working_set.require(*requirements)
def run_script(requires, script_name):
return pkg_resources.working_set.run_script(requires, script_name)
def iter_entry_points(group, name=None):
return pkg_resources.working_set.iter_entry_points(group, name)
def resource_exists(package_or_requirement, resource_name):
return get_provider(package_or_requirement).has_resource(resource_name)
def resource_isdir(package_or_requirement, resource_name):
return get_provider(package_or_requirement).resource_isdir(
resource_name)
def resource_filename(package_or_requirement, resource_name):
return get_provider(package_or_requirement).get_resource_filename(
self, resource_name)
def resource_stream(package_or_requirement, resource_name):
return get_provider(package_or_requirement).get_resource_stream(
self, resource_name)
def resource_string(package_or_requirement, resource_name):
return get_provider(package_or_requirement).get_resource_string(
self, resource_name)
def resource_listdir(package_or_requirement, resource_name):
return get_provider(package_or_requirement).resource_listdir(
resource_name)
def extraction_error():
pass
def get_cache_path(archive_name, names=()):
extract_path = self.extraction_path or get_default_cache()
target_path = os.path.join(extract_path, archive_name+'-tmp', *names)
return target_path
def postprocess(tempname, filename):
pass
def set_extraction_path(path):
pass
def cleanup_resources(force=False):
pass
def get_distribution(dist):
return Distribution(dist)
''')
register_module_extender(MANAGER, 'pkg_resources', pkg_resources_transform)

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# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for pytest."""
from __future__ import absolute_import
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
def pytest_transform():
return AstroidBuilder(MANAGER).string_build('''
try:
import _pytest.mark
import _pytest.recwarn
import _pytest.runner
import _pytest.python
import _pytest.skipping
import _pytest.assertion
except ImportError:
pass
else:
deprecated_call = _pytest.recwarn.deprecated_call
warns = _pytest.recwarn.warns
exit = _pytest.runner.exit
fail = _pytest.runner.fail
skip = _pytest.runner.skip
importorskip = _pytest.runner.importorskip
xfail = _pytest.skipping.xfail
mark = _pytest.mark.MarkGenerator()
raises = _pytest.python.raises
# New in pytest 3.0
try:
approx = _pytest.python.approx
register_assert_rewrite = _pytest.assertion.register_assert_rewrite
except AttributeError:
pass
# Moved in pytest 3.0
try:
import _pytest.freeze_support
freeze_includes = _pytest.freeze_support.freeze_includes
except ImportError:
try:
import _pytest.genscript
freeze_includes = _pytest.genscript.freeze_includes
except ImportError:
pass
try:
import _pytest.debugging
set_trace = _pytest.debugging.pytestPDB().set_trace
except ImportError:
try:
import _pytest.pdb
set_trace = _pytest.pdb.pytestPDB().set_trace
except ImportError:
pass
try:
import _pytest.fixtures
fixture = _pytest.fixtures.fixture
yield_fixture = _pytest.fixtures.yield_fixture
except ImportError:
try:
import _pytest.python
fixture = _pytest.python.fixture
yield_fixture = _pytest.python.yield_fixture
except ImportError:
pass
''')
register_module_extender(MANAGER, 'pytest', pytest_transform)
register_module_extender(MANAGER, 'py.test', pytest_transform)

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# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for the PyQT library."""
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
from astroid import nodes
from astroid import parse
def _looks_like_signal(node, signal_name='pyqtSignal'):
if '__class__' in node.instance_attrs:
try:
cls = node.instance_attrs['__class__'][0]
return cls.name == signal_name
except AttributeError:
# return False if the cls does not have a name attribute
pass
return False
def transform_pyqt_signal(node):
module = parse('''
class pyqtSignal(object):
def connect(self, slot, type=None, no_receiver_check=False):
pass
def disconnect(self, slot):
pass
def emit(self, *args):
pass
''')
signal_cls = module['pyqtSignal']
node.instance_attrs['emit'] = signal_cls['emit']
node.instance_attrs['disconnect'] = signal_cls['disconnect']
node.instance_attrs['connect'] = signal_cls['connect']
def pyqt4_qtcore_transform():
return AstroidBuilder(MANAGER).string_build('''
def SIGNAL(signal_name): pass
class QObject(object):
def emit(self, signal): pass
''')
register_module_extender(MANAGER, 'PyQt4.QtCore', pyqt4_qtcore_transform)
MANAGER.register_transform(nodes.FunctionDef, transform_pyqt_signal,
_looks_like_signal)

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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import random
import astroid
from astroid import helpers
from astroid import MANAGER
ACCEPTED_ITERABLES_FOR_SAMPLE = (
astroid.List,
astroid.Set,
astroid.Tuple,
)
def _clone_node_with_lineno(node, parent, lineno):
cls = node.__class__
other_fields = node._other_fields
_astroid_fields = node._astroid_fields
init_params = {
'lineno': lineno,
'col_offset': node.col_offset,
'parent': parent
}
postinit_params = {
param: getattr(node, param)
for param in _astroid_fields
}
if other_fields:
init_params.update({
param: getattr(node, param)
for param in other_fields
})
new_node = cls(**init_params)
if hasattr(node, 'postinit') and _astroid_fields:
new_node.postinit(**postinit_params)
return new_node
def infer_random_sample(node, context=None):
if len(node.args) != 2:
raise astroid.UseInferenceDefault
length = node.args[1]
if not isinstance(length, astroid.Const):
raise astroid.UseInferenceDefault
if not isinstance(length.value, int):
raise astroid.UseInferenceDefault
inferred_sequence = helpers.safe_infer(node.args[0], context=context)
if inferred_sequence in (None, astroid.Uninferable):
raise astroid.UseInferenceDefault
# TODO: might need to support more cases
if not isinstance(inferred_sequence, ACCEPTED_ITERABLES_FOR_SAMPLE):
raise astroid.UseInferenceDefault
if length.value > len(inferred_sequence.elts):
# In this case, this will raise a ValueError
raise astroid.UseInferenceDefault
try:
elts = random.sample(inferred_sequence.elts, length.value)
except ValueError:
raise astroid.UseInferenceDefault
new_node = astroid.List(
lineno=node.lineno,
col_offset=node.col_offset,
parent=node.scope(),
)
new_elts = [
_clone_node_with_lineno(
elt,
parent=new_node,
lineno=new_node.lineno
)
for elt in elts
]
new_node.postinit(new_elts)
return iter((new_node, ))
def _looks_like_random_sample(node):
func = node.func
if isinstance(func, astroid.Attribute):
return func.attrname == 'sample'
if isinstance(func, astroid.Name):
return func.name == 'sample'
return False
MANAGER.register_transform(
astroid.Call,
astroid.inference_tip(infer_random_sample),
_looks_like_random_sample,
)

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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import sys
import astroid
PY36 = sys.version_info >= (3, 6)
if PY36:
# Since Python 3.6 there is the RegexFlag enum
# where every entry will be exposed via updating globals()
def _re_transform():
return astroid.parse('''
import sre_compile
ASCII = sre_compile.SRE_FLAG_ASCII
IGNORECASE = sre_compile.SRE_FLAG_IGNORECASE
LOCALE = sre_compile.SRE_FLAG_LOCALE
UNICODE = sre_compile.SRE_FLAG_UNICODE
MULTILINE = sre_compile.SRE_FLAG_MULTILINE
DOTALL = sre_compile.SRE_FLAG_DOTALL
VERBOSE = sre_compile.SRE_FLAG_VERBOSE
A = ASCII
I = IGNORECASE
L = LOCALE
U = UNICODE
M = MULTILINE
S = DOTALL
X = VERBOSE
TEMPLATE = sre_compile.SRE_FLAG_TEMPLATE
T = TEMPLATE
DEBUG = sre_compile.SRE_FLAG_DEBUG
''')
astroid.register_module_extender(astroid.MANAGER, 're', _re_transform)

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# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for six module."""
import sys
from textwrap import dedent
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
from astroid.exceptions import AstroidBuildingError, InferenceError, AttributeInferenceError
from astroid import nodes
SIX_ADD_METACLASS = 'six.add_metaclass'
def _indent(text, prefix, predicate=None):
"""Adds 'prefix' to the beginning of selected lines in 'text'.
If 'predicate' is provided, 'prefix' will only be added to the lines
where 'predicate(line)' is True. If 'predicate' is not provided,
it will default to adding 'prefix' to all non-empty lines that do not
consist solely of whitespace characters.
"""
if predicate is None:
predicate = lambda line: line.strip()
def prefixed_lines():
for line in text.splitlines(True):
yield prefix + line if predicate(line) else line
return ''.join(prefixed_lines())
if sys.version_info[0] == 2:
_IMPORTS_2 = """
import BaseHTTPServer
import CGIHTTPServer
import SimpleHTTPServer
from StringIO import StringIO
from cStringIO import StringIO as cStringIO
from UserDict import UserDict
from UserList import UserList
from UserString import UserString
import __builtin__ as builtins
import thread as _thread
import dummy_thread as _dummy_thread
import ConfigParser as configparser
import copy_reg as copyreg
from itertools import (imap as map,
ifilter as filter,
ifilterfalse as filterfalse,
izip_longest as zip_longest,
izip as zip)
import htmlentitydefs as html_entities
import HTMLParser as html_parser
import httplib as http_client
import cookielib as http_cookiejar
import Cookie as http_cookies
import Queue as queue
import repr as reprlib
from pipes import quote as shlex_quote
import SocketServer as socketserver
import SimpleXMLRPCServer as xmlrpc_server
import xmlrpclib as xmlrpc_client
import _winreg as winreg
import robotparser as urllib_robotparser
import Tkinter as tkinter
import tkFileDialog as tkinter_tkfiledialog
input = raw_input
intern = intern
range = xrange
xrange = xrange
reduce = reduce
reload_module = reload
class UrllibParse(object):
def __init__(self):
import urlparse as _urlparse
import urllib as _urllib
self.ParseResult = _urlparse.ParseResult
self.SplitResult = _urlparse.SplitResult
self.parse_qs = _urlparse.parse_qs
self.parse_qsl = _urlparse.parse_qsl
self.urldefrag = _urlparse.urldefrag
self.urljoin = _urlparse.urljoin
self.urlparse = _urlparse.urlparse
self.urlsplit = _urlparse.urlsplit
self.urlunparse = _urlparse.urlunparse
self.urlunsplit = _urlparse.urlunsplit
self.quote = _urllib.quote
self.quote_plus = _urllib.quote_plus
self.unquote = _urllib.unquote
self.unquote_plus = _urllib.unquote_plus
self.urlencode = _urllib.urlencode
self.splitquery = _urllib.splitquery
self.splittag = _urllib.splittag
self.splituser = _urllib.splituser
self.uses_fragment = _urlparse.uses_fragment
self.uses_netloc = _urlparse.uses_netloc
self.uses_params = _urlparse.uses_params
self.uses_query = _urlparse.uses_query
self.uses_relative = _urlparse.uses_relative
class UrllibError(object):
import urllib2 as _urllib2
import urllib as _urllib
URLError = _urllib2.URLError
HTTPError = _urllib2.HTTPError
ContentTooShortError = _urllib.ContentTooShortError
class DummyModule(object):
pass
class UrllibRequest(object):
def __init__(self):
import urlparse as _urlparse
import urllib2 as _urllib2
import urllib as _urllib
self.urlopen = _urllib2.urlopen
self.install_opener = _urllib2.install_opener
self.build_opener = _urllib2.build_opener
self.pathname2url = _urllib.pathname2url
self.url2pathname = _urllib.url2pathname
self.getproxies = _urllib.getproxies
self.Request = _urllib2.Request
self.OpenerDirector = _urllib2.OpenerDirector
self.HTTPDefaultErrorHandler = _urllib2.HTTPDefaultErrorHandler
self.HTTPRedirectHandler = _urllib2.HTTPRedirectHandler
self.HTTPCookieProcessor = _urllib2.HTTPCookieProcessor
self.ProxyHandler = _urllib2.ProxyHandler
self.BaseHandler = _urllib2.BaseHandler
self.HTTPPasswordMgr = _urllib2.HTTPPasswordMgr
self.HTTPPasswordMgrWithDefaultRealm = _urllib2.HTTPPasswordMgrWithDefaultRealm
self.AbstractBasicAuthHandler = _urllib2.AbstractBasicAuthHandler
self.HTTPBasicAuthHandler = _urllib2.HTTPBasicAuthHandler
self.ProxyBasicAuthHandler = _urllib2.ProxyBasicAuthHandler
self.AbstractDigestAuthHandler = _urllib2.AbstractDigestAuthHandler
self.HTTPDigestAuthHandler = _urllib2.HTTPDigestAuthHandler
self.ProxyDigestAuthHandler = _urllib2.ProxyDigestAuthHandler
self.HTTPHandler = _urllib2.HTTPHandler
self.HTTPSHandler = _urllib2.HTTPSHandler
self.FileHandler = _urllib2.FileHandler
self.FTPHandler = _urllib2.FTPHandler
self.CacheFTPHandler = _urllib2.CacheFTPHandler
self.UnknownHandler = _urllib2.UnknownHandler
self.HTTPErrorProcessor = _urllib2.HTTPErrorProcessor
self.urlretrieve = _urllib.urlretrieve
self.urlcleanup = _urllib.urlcleanup
self.proxy_bypass = _urllib.proxy_bypass
urllib_parse = UrllibParse()
urllib_error = UrllibError()
urllib = DummyModule()
urllib.request = UrllibRequest()
urllib.parse = UrllibParse()
urllib.error = UrllibError()
"""
else:
_IMPORTS_3 = """
import _io
cStringIO = _io.StringIO
filter = filter
from itertools import filterfalse
input = input
from sys import intern
map = map
range = range
from imp import reload as reload_module
from functools import reduce
from shlex import quote as shlex_quote
from io import StringIO
from collections import UserDict, UserList, UserString
xrange = range
zip = zip
from itertools import zip_longest
import builtins
import configparser
import copyreg
import _dummy_thread
import http.cookiejar as http_cookiejar
import http.cookies as http_cookies
import html.entities as html_entities
import html.parser as html_parser
import http.client as http_client
import http.server as http_server
BaseHTTPServer = CGIHTTPServer = SimpleHTTPServer = http.server
import pickle as cPickle
import queue
import reprlib
import socketserver
import _thread
import winreg
import xmlrpc.server as xmlrpc_server
import xmlrpc.client as xmlrpc_client
import urllib.robotparser as urllib_robotparser
import email.mime.multipart as email_mime_multipart
import email.mime.nonmultipart as email_mime_nonmultipart
import email.mime.text as email_mime_text
import email.mime.base as email_mime_base
import urllib.parse as urllib_parse
import urllib.error as urllib_error
import tkinter
import tkinter.dialog as tkinter_dialog
import tkinter.filedialog as tkinter_filedialog
import tkinter.scrolledtext as tkinter_scrolledtext
import tkinter.simpledialog as tkinder_simpledialog
import tkinter.tix as tkinter_tix
import tkinter.ttk as tkinter_ttk
import tkinter.constants as tkinter_constants
import tkinter.dnd as tkinter_dnd
import tkinter.colorchooser as tkinter_colorchooser
import tkinter.commondialog as tkinter_commondialog
import tkinter.filedialog as tkinter_tkfiledialog
import tkinter.font as tkinter_font
import tkinter.messagebox as tkinter_messagebox
import urllib
import urllib.request as urllib_request
import urllib.robotparser as urllib_robotparser
import urllib.parse as urllib_parse
import urllib.error as urllib_error
"""
if sys.version_info[0] == 2:
_IMPORTS = dedent(_IMPORTS_2)
else:
_IMPORTS = dedent(_IMPORTS_3)
def six_moves_transform():
code = dedent('''
class Moves(object):
{}
moves = Moves()
''').format(_indent(_IMPORTS, " "))
module = AstroidBuilder(MANAGER).string_build(code)
module.name = 'six.moves'
return module
def _six_fail_hook(modname):
"""Fix six.moves imports due to the dynamic nature of this
class.
Construct a psuedo-module which contains all the nessecary imports
for six
:param modname: Name of failed module
:type modname: str
:return: An astroid module
:rtype: nodes.Module
"""
attribute_of = (modname != "six.moves" and
modname.startswith("six.moves"))
if modname != 'six.moves' and not attribute_of:
raise AstroidBuildingError(modname=modname)
module = AstroidBuilder(MANAGER).string_build(_IMPORTS)
module.name = 'six.moves'
if attribute_of:
# Facilitate import of submodules in Moves
start_index = len(module.name)
attribute = modname[start_index:].lstrip(".").replace(".", "_")
try:
import_attr = module.getattr(attribute)[0]
except AttributeInferenceError:
raise AstroidBuildingError(modname=modname)
if isinstance(import_attr, nodes.Import):
submodule = MANAGER.ast_from_module_name(import_attr.names[0][0])
return submodule
# Let dummy submodule imports pass through
# This will cause an Uninferable result, which is okay
return module
def transform_six_add_metaclass(node):
"""Check if the given class node is decorated with *six.add_metaclass*
If so, inject its argument as the metaclass of the underlying class.
"""
if not node.decorators:
return
for decorator in node.decorators.nodes:
if not isinstance(decorator, nodes.Call):
continue
try:
func = next(decorator.func.infer())
except InferenceError:
continue
if func.qname() == SIX_ADD_METACLASS and decorator.args:
metaclass = decorator.args[0]
node._metaclass = metaclass
return node
register_module_extender(MANAGER, 'six', six_moves_transform)
register_module_extender(MANAGER, 'requests.packages.urllib3.packages.six',
six_moves_transform)
MANAGER.register_failed_import_hook(_six_fail_hook)
MANAGER.register_transform(nodes.ClassDef, transform_six_add_metaclass)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for the ssl library."""
from astroid import MANAGER, register_module_extender
from astroid.builder import AstroidBuilder
from astroid import nodes
from astroid import parse
def ssl_transform():
return parse('''
from _ssl import OPENSSL_VERSION_NUMBER, OPENSSL_VERSION_INFO, OPENSSL_VERSION
from _ssl import _SSLContext, MemoryBIO
from _ssl import (
SSLError, SSLZeroReturnError, SSLWantReadError, SSLWantWriteError,
SSLSyscallError, SSLEOFError,
)
from _ssl import CERT_NONE, CERT_OPTIONAL, CERT_REQUIRED
from _ssl import txt2obj as _txt2obj, nid2obj as _nid2obj
from _ssl import RAND_status, RAND_add, RAND_bytes, RAND_pseudo_bytes
try:
from _ssl import RAND_egd
except ImportError:
# LibreSSL does not provide RAND_egd
pass
from _ssl import (OP_ALL, OP_CIPHER_SERVER_PREFERENCE,
OP_NO_COMPRESSION, OP_NO_SSLv2, OP_NO_SSLv3,
OP_NO_TLSv1, OP_NO_TLSv1_1, OP_NO_TLSv1_2,
OP_SINGLE_DH_USE, OP_SINGLE_ECDH_USE)
from _ssl import (ALERT_DESCRIPTION_ACCESS_DENIED, ALERT_DESCRIPTION_BAD_CERTIFICATE,
ALERT_DESCRIPTION_BAD_CERTIFICATE_HASH_VALUE,
ALERT_DESCRIPTION_BAD_CERTIFICATE_STATUS_RESPONSE,
ALERT_DESCRIPTION_BAD_RECORD_MAC,
ALERT_DESCRIPTION_CERTIFICATE_EXPIRED,
ALERT_DESCRIPTION_CERTIFICATE_REVOKED,
ALERT_DESCRIPTION_CERTIFICATE_UNKNOWN,
ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE,
ALERT_DESCRIPTION_CLOSE_NOTIFY, ALERT_DESCRIPTION_DECODE_ERROR,
ALERT_DESCRIPTION_DECOMPRESSION_FAILURE,
ALERT_DESCRIPTION_DECRYPT_ERROR,
ALERT_DESCRIPTION_HANDSHAKE_FAILURE,
ALERT_DESCRIPTION_ILLEGAL_PARAMETER,
ALERT_DESCRIPTION_INSUFFICIENT_SECURITY,
ALERT_DESCRIPTION_INTERNAL_ERROR,
ALERT_DESCRIPTION_NO_RENEGOTIATION,
ALERT_DESCRIPTION_PROTOCOL_VERSION,
ALERT_DESCRIPTION_RECORD_OVERFLOW,
ALERT_DESCRIPTION_UNEXPECTED_MESSAGE,
ALERT_DESCRIPTION_UNKNOWN_CA,
ALERT_DESCRIPTION_UNKNOWN_PSK_IDENTITY,
ALERT_DESCRIPTION_UNRECOGNIZED_NAME,
ALERT_DESCRIPTION_UNSUPPORTED_CERTIFICATE,
ALERT_DESCRIPTION_UNSUPPORTED_EXTENSION,
ALERT_DESCRIPTION_USER_CANCELLED)
from _ssl import (SSL_ERROR_EOF, SSL_ERROR_INVALID_ERROR_CODE, SSL_ERROR_SSL,
SSL_ERROR_SYSCALL, SSL_ERROR_WANT_CONNECT, SSL_ERROR_WANT_READ,
SSL_ERROR_WANT_WRITE, SSL_ERROR_WANT_X509_LOOKUP, SSL_ERROR_ZERO_RETURN)
from _ssl import VERIFY_CRL_CHECK_CHAIN, VERIFY_CRL_CHECK_LEAF, VERIFY_DEFAULT, VERIFY_X509_STRICT
from _ssl import HAS_SNI, HAS_ECDH, HAS_NPN, HAS_ALPN
from _ssl import _OPENSSL_API_VERSION
from _ssl import PROTOCOL_SSLv23, PROTOCOL_TLSv1, PROTOCOL_TLSv1_1, PROTOCOL_TLSv1_2
''')
register_module_extender(MANAGER, 'ssl', ssl_transform)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import sys
import textwrap
import six
import astroid
PY34 = sys.version_info >= (3, 4)
PY36 = sys.version_info >= (3, 6)
def _subprocess_transform():
if six.PY3:
communicate = (bytes('string', 'ascii'), bytes('string', 'ascii'))
communicate_signature = 'def communicate(self, input=None, timeout=None)'
if PY36:
init = """
def __init__(self, args, bufsize=0, executable=None,
stdin=None, stdout=None, stderr=None,
preexec_fn=None, close_fds=False, shell=False,
cwd=None, env=None, universal_newlines=False,
startupinfo=None, creationflags=0, restore_signals=True,
start_new_session=False, pass_fds=(), *,
encoding=None, errors=None):
pass
"""
else:
init = """
def __init__(self, args, bufsize=0, executable=None,
stdin=None, stdout=None, stderr=None,
preexec_fn=None, close_fds=False, shell=False,
cwd=None, env=None, universal_newlines=False,
startupinfo=None, creationflags=0, restore_signals=True,
start_new_session=False, pass_fds=()):
pass
"""
else:
communicate = ('string', 'string')
communicate_signature = 'def communicate(self, input=None)'
init = """
def __init__(self, args, bufsize=0, executable=None,
stdin=None, stdout=None, stderr=None,
preexec_fn=None, close_fds=False, shell=False,
cwd=None, env=None, universal_newlines=False,
startupinfo=None, creationflags=0):
pass
"""
if PY34:
wait_signature = 'def wait(self, timeout=None)'
else:
wait_signature = 'def wait(self)'
if six.PY3:
ctx_manager = '''
def __enter__(self): return self
def __exit__(self, *args): pass
'''
else:
ctx_manager = ''
code = textwrap.dedent('''
class Popen(object):
returncode = pid = 0
stdin = stdout = stderr = file()
%(communicate_signature)s:
return %(communicate)r
%(wait_signature)s:
return self.returncode
def poll(self):
return self.returncode
def send_signal(self, signal):
pass
def terminate(self):
pass
def kill(self):
pass
%(ctx_manager)s
''' % {'communicate': communicate,
'communicate_signature': communicate_signature,
'wait_signature': wait_signature,
'ctx_manager': ctx_manager})
init_lines = textwrap.dedent(init).splitlines()
indented_init = '\n'.join([' ' * 4 + line for line in init_lines])
code += indented_init
return astroid.parse(code)
astroid.register_module_extender(astroid.MANAGER, 'subprocess', _subprocess_transform)

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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
import astroid
def _thread_transform():
return astroid.parse('''
class lock(object):
def acquire(self, blocking=True):
pass
def release(self):
pass
def __enter__(self):
return True
def __exit__(self, *args):
pass
def Lock():
return lock()
''')
astroid.register_module_extender(astroid.MANAGER, 'threading', _thread_transform)

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# Copyright (c) 2016 David Euresti <david@dropbox.com>
"""Astroid hooks for typing.py support."""
import textwrap
from astroid import (
MANAGER, UseInferenceDefault, extract_node, inference_tip,
nodes, InferenceError)
from astroid.nodes import List, Tuple
TYPING_NAMEDTUPLE_BASENAMES = {
'NamedTuple',
'typing.NamedTuple'
}
def infer_typing_namedtuple(node, context=None):
"""Infer a typing.NamedTuple(...) call."""
# This is essentially a namedtuple with different arguments
# so we extract the args and infer a named tuple.
try:
func = next(node.func.infer())
except InferenceError:
raise UseInferenceDefault
if func.qname() != 'typing.NamedTuple':
raise UseInferenceDefault
if len(node.args) != 2:
raise UseInferenceDefault
if not isinstance(node.args[1], (List, Tuple)):
raise UseInferenceDefault
names = []
for elt in node.args[1].elts:
if not isinstance(elt, (List, Tuple)):
raise UseInferenceDefault
if len(elt.elts) != 2:
raise UseInferenceDefault
names.append(elt.elts[0].as_string())
typename = node.args[0].as_string()
node = extract_node('namedtuple(%(typename)s, (%(fields)s,)) ' %
{'typename': typename, 'fields': ",".join(names)})
return node.infer(context=context)
def infer_typing_namedtuple_class(node, context=None):
"""Infer a subclass of typing.NamedTuple"""
# Check if it has the corresponding bases
annassigns_fields = [
annassign.target.name for annassign in node.body
if isinstance(annassign, nodes.AnnAssign)
]
code = textwrap.dedent('''
from collections import namedtuple
namedtuple({typename!r}, {fields!r})
''').format(
typename=node.name,
fields=",".join(annassigns_fields)
)
node = extract_node(code)
return node.infer(context=context)
def has_namedtuple_base(node):
"""Predicate for class inference tip
:type node: ClassDef
:rtype: bool
"""
return set(node.basenames) & TYPING_NAMEDTUPLE_BASENAMES
def looks_like_typing_namedtuple(node):
func = node.func
if isinstance(func, nodes.Attribute):
return func.attrname == 'NamedTuple'
if isinstance(func, nodes.Name):
return func.name == 'NamedTuple'
return False
MANAGER.register_transform(
nodes.Call,
inference_tip(infer_typing_namedtuple),
looks_like_typing_namedtuple
)
MANAGER.register_transform(
nodes.ClassDef,
inference_tip(infer_typing_namedtuple_class),
has_namedtuple_base
)

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# Copyright (c) 2017 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Astroid hooks for the UUID module."""
from astroid import MANAGER
from astroid import nodes
def _patch_uuid_class(node):
# The .int member is patched using __dict__
node.locals['int'] = [nodes.Const(0, parent=node)]
MANAGER.register_transform(
nodes.ClassDef,
_patch_uuid_class,
lambda node: node.qname() == 'uuid.UUID'
)

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# Copyright (c) 2006-2011, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014-2015 Google, Inc.
# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""The AstroidBuilder makes astroid from living object and / or from _ast
The builder is not thread safe and can't be used to parse different sources
at the same time.
"""
import re
import os
import sys
import textwrap
import _ast
from astroid import bases
from astroid import exceptions
from astroid import manager
from astroid import modutils
from astroid import raw_building
from astroid import rebuilder
from astroid import nodes
from astroid import util
# The name of the transient function that is used to
# wrap expressions to be extracted when calling
# extract_node.
_TRANSIENT_FUNCTION = '__'
# The comment used to select a statement to be extracted
# when calling extract_node.
_STATEMENT_SELECTOR = '#@'
def _parse(string):
return compile(string, "<string>", 'exec', _ast.PyCF_ONLY_AST)
if sys.version_info >= (3, 0):
from tokenize import detect_encoding
def open_source_file(filename):
with open(filename, 'rb') as byte_stream:
encoding = detect_encoding(byte_stream.readline)[0]
stream = open(filename, 'r', newline=None, encoding=encoding)
data = stream.read()
return stream, encoding, data
else:
_ENCODING_RGX = re.compile(r"\s*#+.*coding[:=]\s*([-\w.]+)")
def _guess_encoding(string):
"""get encoding from a python file as string or return None if not found"""
# check for UTF-8 byte-order mark
if string.startswith('\xef\xbb\xbf'):
return 'UTF-8'
for line in string.split('\n', 2)[:2]:
# check for encoding declaration
match = _ENCODING_RGX.match(line)
if match is not None:
return match.group(1)
return None
def open_source_file(filename):
"""get data for parsing a file"""
stream = open(filename, 'U')
data = stream.read()
encoding = _guess_encoding(data)
return stream, encoding, data
MANAGER = manager.AstroidManager()
def _can_assign_attr(node, attrname):
try:
slots = node.slots()
except NotImplementedError:
pass
else:
if slots and attrname not in set(slot.value for slot in slots):
return False
return True
class AstroidBuilder(raw_building.InspectBuilder):
"""Class for building an astroid tree from source code or from a live module.
The param *manager* specifies the manager class which should be used.
If no manager is given, then the default one will be used. The
param *apply_transforms* determines if the transforms should be
applied after the tree was built from source or from a live object,
by default being True.
"""
# pylint: disable=redefined-outer-name
def __init__(self, manager=None, apply_transforms=True):
super(AstroidBuilder, self).__init__()
self._manager = manager or MANAGER
self._apply_transforms = apply_transforms
def module_build(self, module, modname=None):
"""Build an astroid from a living module instance."""
node = None
path = getattr(module, '__file__', None)
if path is not None:
path_, ext = os.path.splitext(modutils._path_from_filename(path))
if ext in ('.py', '.pyc', '.pyo') and os.path.exists(path_ + '.py'):
node = self.file_build(path_ + '.py', modname)
if node is None:
# this is a built-in module
# get a partial representation by introspection
node = self.inspect_build(module, modname=modname, path=path)
if self._apply_transforms:
# We have to handle transformation by ourselves since the
# rebuilder isn't called for builtin nodes
node = self._manager.visit_transforms(node)
return node
def file_build(self, path, modname=None):
"""Build astroid from a source code file (i.e. from an ast)
*path* is expected to be a python source file
"""
try:
stream, encoding, data = open_source_file(path)
except IOError as exc:
util.reraise(exceptions.AstroidBuildingError(
'Unable to load file {path}:\n{error}',
modname=modname, path=path, error=exc))
except (SyntaxError, LookupError) as exc:
util.reraise(exceptions.AstroidSyntaxError(
'Python 3 encoding specification error or unknown encoding:\n'
'{error}', modname=modname, path=path, error=exc))
except UnicodeError: # wrong encoding
# detect_encoding returns utf-8 if no encoding specified
util.reraise(exceptions.AstroidBuildingError(
'Wrong or no encoding specified for {filename}.',
filename=path))
with stream:
# get module name if necessary
if modname is None:
try:
modname = '.'.join(modutils.modpath_from_file(path))
except ImportError:
modname = os.path.splitext(os.path.basename(path))[0]
# build astroid representation
module = self._data_build(data, modname, path)
return self._post_build(module, encoding)
def string_build(self, data, modname='', path=None):
"""Build astroid from source code string."""
module = self._data_build(data, modname, path)
module.file_bytes = data.encode('utf-8')
return self._post_build(module, 'utf-8')
def _post_build(self, module, encoding):
"""Handles encoding and delayed nodes after a module has been built"""
module.file_encoding = encoding
self._manager.cache_module(module)
# post tree building steps after we stored the module in the cache:
for from_node in module._import_from_nodes:
if from_node.modname == '__future__':
for symbol, _ in from_node.names:
module.future_imports.add(symbol)
self.add_from_names_to_locals(from_node)
# handle delayed assattr nodes
for delayed in module._delayed_assattr:
self.delayed_assattr(delayed)
# Visit the transforms
if self._apply_transforms:
module = self._manager.visit_transforms(module)
return module
def _data_build(self, data, modname, path):
"""Build tree node from data and add some informations"""
try:
node = _parse(data + '\n')
except (TypeError, ValueError, SyntaxError) as exc:
util.reraise(exceptions.AstroidSyntaxError(
'Parsing Python code failed:\n{error}',
source=data, modname=modname, path=path, error=exc))
if path is not None:
node_file = os.path.abspath(path)
else:
node_file = '<?>'
if modname.endswith('.__init__'):
modname = modname[:-9]
package = True
else:
package = path is not None and os.path.splitext(os.path.basename(path))[0] == '__init__'
builder = rebuilder.TreeRebuilder(self._manager)
module = builder.visit_module(node, modname, node_file, package)
module._import_from_nodes = builder._import_from_nodes
module._delayed_assattr = builder._delayed_assattr
return module
def add_from_names_to_locals(self, node):
"""Store imported names to the locals
Resort the locals if coming from a delayed node
"""
_key_func = lambda node: node.fromlineno
def sort_locals(my_list):
my_list.sort(key=_key_func)
for (name, asname) in node.names:
if name == '*':
try:
imported = node.do_import_module()
except exceptions.AstroidBuildingError:
continue
for name in imported.public_names():
node.parent.set_local(name, node)
sort_locals(node.parent.scope().locals[name])
else:
node.parent.set_local(asname or name, node)
sort_locals(node.parent.scope().locals[asname or name])
def delayed_assattr(self, node):
"""Visit a AssAttr node
This adds name to locals and handle members definition.
"""
try:
frame = node.frame()
for inferred in node.expr.infer():
if inferred is util.Uninferable:
continue
try:
if inferred.__class__ is bases.Instance:
inferred = inferred._proxied
iattrs = inferred.instance_attrs
if not _can_assign_attr(inferred, node.attrname):
continue
elif isinstance(inferred, bases.Instance):
# Const, Tuple, ... we may be wrong, may be not, but
# anyway we don't want to pollute builtin's namespace
continue
elif inferred.is_function:
iattrs = inferred.instance_attrs
else:
iattrs = inferred.locals
except AttributeError:
# XXX log error
continue
values = iattrs.setdefault(node.attrname, [])
if node in values:
continue
# get assign in __init__ first XXX useful ?
if (frame.name == '__init__' and values and
values[0].frame().name != '__init__'):
values.insert(0, node)
else:
values.append(node)
except exceptions.InferenceError:
pass
def build_namespace_package_module(name, path):
return nodes.Module(name, doc='', path=path, package=True)
def parse(code, module_name='', path=None, apply_transforms=True):
"""Parses a source string in order to obtain an astroid AST from it
:param str code: The code for the module.
:param str module_name: The name for the module, if any
:param str path: The path for the module
:param bool apply_transforms:
Apply the transforms for the give code. Use it if you
don't want the default transforms to be applied.
"""
code = textwrap.dedent(code)
builder = AstroidBuilder(manager=MANAGER,
apply_transforms=apply_transforms)
return builder.string_build(code, modname=module_name, path=path)
def _extract_expressions(node):
"""Find expressions in a call to _TRANSIENT_FUNCTION and extract them.
The function walks the AST recursively to search for expressions that
are wrapped into a call to _TRANSIENT_FUNCTION. If it finds such an
expression, it completely removes the function call node from the tree,
replacing it by the wrapped expression inside the parent.
:param node: An astroid node.
:type node: astroid.bases.NodeNG
:yields: The sequence of wrapped expressions on the modified tree
expression can be found.
"""
if (isinstance(node, nodes.Call)
and isinstance(node.func, nodes.Name)
and node.func.name == _TRANSIENT_FUNCTION):
real_expr = node.args[0]
real_expr.parent = node.parent
# Search for node in all _astng_fields (the fields checked when
# get_children is called) of its parent. Some of those fields may
# be lists or tuples, in which case the elements need to be checked.
# When we find it, replace it by real_expr, so that the AST looks
# like no call to _TRANSIENT_FUNCTION ever took place.
for name in node.parent._astroid_fields:
child = getattr(node.parent, name)
if isinstance(child, (list, tuple)):
for idx, compound_child in enumerate(child):
if compound_child is node:
child[idx] = real_expr
elif child is node:
setattr(node.parent, name, real_expr)
yield real_expr
else:
for child in node.get_children():
for result in _extract_expressions(child):
yield result
def _find_statement_by_line(node, line):
"""Extracts the statement on a specific line from an AST.
If the line number of node matches line, it will be returned;
otherwise its children are iterated and the function is called
recursively.
:param node: An astroid node.
:type node: astroid.bases.NodeNG
:param line: The line number of the statement to extract.
:type line: int
:returns: The statement on the line, or None if no statement for the line
can be found.
:rtype: astroid.bases.NodeNG or None
"""
if isinstance(node, (nodes.ClassDef, nodes.FunctionDef)):
# This is an inaccuracy in the AST: the nodes that can be
# decorated do not carry explicit information on which line
# the actual definition (class/def), but .fromline seems to
# be close enough.
node_line = node.fromlineno
else:
node_line = node.lineno
if node_line == line:
return node
for child in node.get_children():
result = _find_statement_by_line(child, line)
if result:
return result
return None
def extract_node(code, module_name=''):
"""Parses some Python code as a module and extracts a designated AST node.
Statements:
To extract one or more statement nodes, append #@ to the end of the line
Examples:
>>> def x():
>>> def y():
>>> return 1 #@
The return statement will be extracted.
>>> class X(object):
>>> def meth(self): #@
>>> pass
The function object 'meth' will be extracted.
Expressions:
To extract arbitrary expressions, surround them with the fake
function call __(...). After parsing, the surrounded expression
will be returned and the whole AST (accessible via the returned
node's parent attribute) will look like the function call was
never there in the first place.
Examples:
>>> a = __(1)
The const node will be extracted.
>>> def x(d=__(foo.bar)): pass
The node containing the default argument will be extracted.
>>> def foo(a, b):
>>> return 0 < __(len(a)) < b
The node containing the function call 'len' will be extracted.
If no statements or expressions are selected, the last toplevel
statement will be returned.
If the selected statement is a discard statement, (i.e. an expression
turned into a statement), the wrapped expression is returned instead.
For convenience, singleton lists are unpacked.
:param str code: A piece of Python code that is parsed as
a module. Will be passed through textwrap.dedent first.
:param str module_name: The name of the module.
:returns: The designated node from the parse tree, or a list of nodes.
:rtype: astroid.bases.NodeNG, or a list of nodes.
"""
def _extract(node):
if isinstance(node, nodes.Expr):
return node.value
return node
requested_lines = []
for idx, line in enumerate(code.splitlines()):
if line.strip().endswith(_STATEMENT_SELECTOR):
requested_lines.append(idx + 1)
tree = parse(code, module_name=module_name)
extracted = []
if requested_lines:
for line in requested_lines:
extracted.append(_find_statement_by_line(tree, line))
# Modifies the tree.
extracted.extend(_extract_expressions(tree))
if not extracted:
extracted.append(tree.body[-1])
extracted = [_extract(node) for node in extracted]
if len(extracted) == 1:
return extracted[0]
return extracted

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# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""Various context related utilities, including inference and call contexts."""
import contextlib
import copy
import pprint
class InferenceContext(object):
"""Provide context for inference
Store already inferred nodes to save time
Account for already visited nodes to infinite stop infinite recursion
"""
__slots__ = ('path', 'lookupname', 'callcontext', 'boundnode', 'inferred')
def __init__(self, path=None, inferred=None):
self.path = path or set()
"""Path of visited nodes and their lookupname
:type: set(tuple(NodeNG, optional(str)))"""
self.lookupname = None
self.callcontext = None
self.boundnode = None
self.inferred = inferred or {}
"""
:type: dict(seq, seq)
Inferred node contexts to their mapped results
Currently the key is (node, lookupname, callcontext, boundnode)
and the value is tuple of the inferred results
"""
def push(self, node):
"""Push node into inference path
:return: True if node is already in context path else False
:rtype: bool
Allows one to see if the given node has already
been looked at for this inference context"""
name = self.lookupname
if (node, name) in self.path:
return True
self.path.add((node, name))
return False
def clone(self):
"""Clone inference path
For example, each side of a binary operation (BinOp)
starts with the same context but diverge as each side is inferred
so the InferenceContext will need be cloned"""
# XXX copy lookupname/callcontext ?
clone = InferenceContext(copy.copy(self.path), inferred=self.inferred)
clone.callcontext = self.callcontext
clone.boundnode = self.boundnode
return clone
def cache_generator(self, key, generator):
"""Cache result of generator into dictionary
Used to cache inference results"""
results = []
for result in generator:
results.append(result)
yield result
self.inferred[key] = tuple(results)
@contextlib.contextmanager
def restore_path(self):
path = set(self.path)
yield
self.path = path
def __str__(self):
state = ('%s=%s' % (field, pprint.pformat(getattr(self, field),
width=80 - len(field)))
for field in self.__slots__)
return '%s(%s)' % (type(self).__name__, ',\n '.join(state))
class CallContext(object):
"""Holds information for a call site."""
__slots__ = ('args', 'keywords')
def __init__(self, args, keywords=None):
self.args = args
if keywords:
keywords = [(arg.arg, arg.value) for arg in keywords]
else:
keywords = []
self.keywords = keywords
def copy_context(context):
if context is not None:
return context.clone()
return InferenceContext()

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# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Copyright (c) 2015 Florian Bruhin <me@the-compiler.org>
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
""" A few useful function/method decorators."""
import functools
import wrapt
from astroid import context as contextmod
from astroid import exceptions
from astroid import util
@wrapt.decorator
def cached(func, instance, args, kwargs):
"""Simple decorator to cache result of method calls without args."""
cache = getattr(instance, '__cache', None)
if cache is None:
instance.__cache = cache = {}
try:
return cache[func]
except KeyError:
cache[func] = result = func(*args, **kwargs)
return result
class cachedproperty(object):
""" Provides a cached property equivalent to the stacking of
@cached and @property, but more efficient.
After first usage, the <property_name> becomes part of the object's
__dict__. Doing:
del obj.<property_name> empties the cache.
Idea taken from the pyramid_ framework and the mercurial_ project.
.. _pyramid: http://pypi.python.org/pypi/pyramid
.. _mercurial: http://pypi.python.org/pypi/Mercurial
"""
__slots__ = ('wrapped',)
def __init__(self, wrapped):
try:
wrapped.__name__
except AttributeError:
util.reraise(TypeError('%s must have a __name__ attribute'
% wrapped))
self.wrapped = wrapped
@property
def __doc__(self):
doc = getattr(self.wrapped, '__doc__', None)
return ('<wrapped by the cachedproperty decorator>%s'
% ('\n%s' % doc if doc else ''))
def __get__(self, inst, objtype=None):
if inst is None:
return self
val = self.wrapped(inst)
setattr(inst, self.wrapped.__name__, val)
return val
def path_wrapper(func):
"""return the given infer function wrapped to handle the path
Used to stop inference if the node has already been looked
at for a given `InferenceContext` to prevent infinite recursion
"""
# TODO: switch this to wrapt after the monkey-patching is fixed (ceridwen)
@functools.wraps(func)
def wrapped(node, context=None, _func=func, **kwargs):
"""wrapper function handling context"""
if context is None:
context = contextmod.InferenceContext()
if context.push(node):
return
yielded = set()
generator = _func(node, context, **kwargs)
try:
while True:
res = next(generator)
# unproxy only true instance, not const, tuple, dict...
if res.__class__.__name__ == 'Instance':
ares = res._proxied
else:
ares = res
if ares not in yielded:
yield res
yielded.add(ares)
except StopIteration as error:
# Explicit StopIteration to return error information, see
# comment in raise_if_nothing_inferred.
if error.args:
raise StopIteration(error.args[0])
else:
raise StopIteration
return wrapped
@wrapt.decorator
def yes_if_nothing_inferred(func, instance, args, kwargs):
inferred = False
for node in func(*args, **kwargs):
inferred = True
yield node
if not inferred:
yield util.Uninferable
@wrapt.decorator
def raise_if_nothing_inferred(func, instance, args, kwargs):
'''All generators wrapped with raise_if_nothing_inferred *must*
explicitly raise StopIteration with information to create an
appropriate structured InferenceError.
'''
# TODO: Explicitly raising StopIteration in a generator will cause
# a RuntimeError in Python >=3.7, as per
# http://legacy.python.org/dev/peps/pep-0479/ . Before 3.7 is
# released, this code will need to use one of four possible
# solutions: a decorator that restores the current behavior as
# described in
# http://legacy.python.org/dev/peps/pep-0479/#sub-proposal-decorator-to-explicitly-request-current-behaviour
# , dynamic imports or exec to generate different code for
# different versions, drop support for all Python versions <3.3,
# or refactoring to change how these decorators work. In any
# event, after dropping support for Python <3.3 this code should
# be refactored to use `yield from`.
inferred = False
try:
generator = func(*args, **kwargs)
while True:
yield next(generator)
inferred = True
except StopIteration as error:
if not inferred:
if error.args:
# pylint: disable=not-a-mapping
raise exceptions.InferenceError(**error.args[0])
else:
raise exceptions.InferenceError(
'StopIteration raised without any error information.')

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# Copyright (c) 2007, 2009-2010, 2013 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2014 Google, Inc.
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""this module contains exceptions used in the astroid library
"""
from astroid import util
class AstroidError(Exception):
"""base exception class for all astroid related exceptions
AstroidError and its subclasses are structured, intended to hold
objects representing state when the exception is thrown. Field
values are passed to the constructor as keyword-only arguments.
Each subclass has its own set of standard fields, but use your
best judgment to decide whether a specific exception instance
needs more or fewer fields for debugging. Field values may be
used to lazily generate the error message: self.message.format()
will be called with the field names and values supplied as keyword
arguments.
"""
def __init__(self, message='', **kws):
super(AstroidError, self).__init__(message)
self.message = message
for key, value in kws.items():
setattr(self, key, value)
def __str__(self):
return self.message.format(**vars(self))
class AstroidBuildingError(AstroidError):
"""exception class when we are unable to build an astroid representation
Standard attributes:
modname: Name of the module that AST construction failed for.
error: Exception raised during construction.
"""
def __init__(self, message='Failed to import module {modname}.', **kws):
super(AstroidBuildingError, self).__init__(message, **kws)
class AstroidImportError(AstroidBuildingError):
"""Exception class used when a module can't be imported by astroid."""
class TooManyLevelsError(AstroidImportError):
"""Exception class which is raised when a relative import was beyond the top-level.
Standard attributes:
level: The level which was attempted.
name: the name of the module on which the relative import was attempted.
"""
level = None
name = None
def __init__(self, message='Relative import with too many levels '
'({level}) for module {name!r}', **kws):
super(TooManyLevelsError, self).__init__(message, **kws)
class AstroidSyntaxError(AstroidBuildingError):
"""Exception class used when a module can't be parsed."""
class NoDefault(AstroidError):
"""raised by function's `default_value` method when an argument has
no default value
Standard attributes:
func: Function node.
name: Name of argument without a default.
"""
func = None
name = None
def __init__(self, message='{func!r} has no default for {name!r}.', **kws):
super(NoDefault, self).__init__(message, **kws)
class ResolveError(AstroidError):
"""Base class of astroid resolution/inference error.
ResolveError is not intended to be raised.
Standard attributes:
context: InferenceContext object.
"""
context = None
class MroError(ResolveError):
"""Error raised when there is a problem with method resolution of a class.
Standard attributes:
mros: A sequence of sequences containing ClassDef nodes.
cls: ClassDef node whose MRO resolution failed.
context: InferenceContext object.
"""
mros = ()
cls = None
def __str__(self):
mro_names = ", ".join("({})".format(", ".join(b.name for b in m))
for m in self.mros)
return self.message.format(mros=mro_names, cls=self.cls)
class DuplicateBasesError(MroError):
"""Error raised when there are duplicate bases in the same class bases."""
class InconsistentMroError(MroError):
"""Error raised when a class's MRO is inconsistent."""
class SuperError(ResolveError):
"""Error raised when there is a problem with a super call.
Standard attributes:
super_: The Super instance that raised the exception.
context: InferenceContext object.
"""
super_ = None
def __str__(self):
return self.message.format(**vars(self.super_))
class InferenceError(ResolveError):
"""raised when we are unable to infer a node
Standard attributes:
node: The node inference was called on.
context: InferenceContext object.
"""
node = None
context = None
def __init__(self, message='Inference failed for {node!r}.', **kws):
super(InferenceError, self).__init__(message, **kws)
# Why does this inherit from InferenceError rather than ResolveError?
# Changing it causes some inference tests to fail.
class NameInferenceError(InferenceError):
"""Raised when a name lookup fails, corresponds to NameError.
Standard attributes:
name: The name for which lookup failed, as a string.
scope: The node representing the scope in which the lookup occurred.
context: InferenceContext object.
"""
name = None
scope = None
def __init__(self, message='{name!r} not found in {scope!r}.', **kws):
super(NameInferenceError, self).__init__(message, **kws)
class AttributeInferenceError(ResolveError):
"""Raised when an attribute lookup fails, corresponds to AttributeError.
Standard attributes:
target: The node for which lookup failed.
attribute: The attribute for which lookup failed, as a string.
context: InferenceContext object.
"""
target = None
attribute = None
def __init__(self, message='{attribute!r} not found on {target!r}.', **kws):
super(AttributeInferenceError, self).__init__(message, **kws)
class UseInferenceDefault(Exception):
"""exception to be raised in custom inference function to indicate that it
should go back to the default behaviour
"""
class _NonDeducibleTypeHierarchy(Exception):
"""Raised when is_subtype / is_supertype can't deduce the relation between two types."""
class AstroidIndexError(AstroidError):
"""Raised when an Indexable / Mapping does not have an index / key."""
class AstroidTypeError(AstroidError):
"""Raised when a TypeError would be expected in Python code."""
class InferenceOverwriteError(AstroidError):
"""Raised when an inference tip is overwritten
Currently only used for debugging.
"""
# Backwards-compatibility aliases
OperationError = util.BadOperationMessage
UnaryOperationError = util.BadUnaryOperationMessage
BinaryOperationError = util.BadBinaryOperationMessage
SuperArgumentTypeError = SuperError
UnresolvableName = NameInferenceError
NotFoundError = AttributeInferenceError
AstroidBuildingException = AstroidBuildingError

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# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Copyright (c) 2015-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""
Various helper utilities.
"""
import six
from astroid import bases
from astroid import context as contextmod
from astroid import exceptions
from astroid import manager
from astroid import nodes
from astroid import raw_building
from astroid import scoped_nodes
from astroid import util
BUILTINS = six.moves.builtins.__name__
def _build_proxy_class(cls_name, builtins):
proxy = raw_building.build_class(cls_name)
proxy.parent = builtins
return proxy
def _function_type(function, builtins):
if isinstance(function, scoped_nodes.Lambda):
if function.root().name == BUILTINS:
cls_name = 'builtin_function_or_method'
else:
cls_name = 'function'
elif isinstance(function, bases.BoundMethod):
if six.PY2:
cls_name = 'instancemethod'
else:
cls_name = 'method'
elif isinstance(function, bases.UnboundMethod):
if six.PY2:
cls_name = 'instancemethod'
else:
cls_name = 'function'
return _build_proxy_class(cls_name, builtins)
def _object_type(node, context=None):
astroid_manager = manager.AstroidManager()
builtins = astroid_manager.astroid_cache[BUILTINS]
context = context or contextmod.InferenceContext()
for inferred in node.infer(context=context):
if isinstance(inferred, scoped_nodes.ClassDef):
if inferred.newstyle:
metaclass = inferred.metaclass()
if metaclass:
yield metaclass
continue
yield builtins.getattr('type')[0]
elif isinstance(inferred, (scoped_nodes.Lambda, bases.UnboundMethod)):
yield _function_type(inferred, builtins)
elif isinstance(inferred, scoped_nodes.Module):
yield _build_proxy_class('module', builtins)
else:
yield inferred._proxied
def object_type(node, context=None):
"""Obtain the type of the given node
This is used to implement the ``type`` builtin, which means that it's
used for inferring type calls, as well as used in a couple of other places
in the inference.
The node will be inferred first, so this function can support all
sorts of objects, as long as they support inference.
"""
try:
types = set(_object_type(node, context))
except exceptions.InferenceError:
return util.Uninferable
if len(types) > 1 or not types:
return util.Uninferable
return list(types)[0]
def safe_infer(node, context=None):
"""Return the inferred value for the given node.
Return None if inference failed or if there is some ambiguity (more than
one node has been inferred).
"""
try:
inferit = node.infer(context=context)
value = next(inferit)
except exceptions.InferenceError:
return None
try:
next(inferit)
return None # None if there is ambiguity on the inferred node
except exceptions.InferenceError:
return None# there is some kind of ambiguity
except StopIteration:
return value
def has_known_bases(klass, context=None):
"""Return true if all base classes of a class could be inferred."""
try:
return klass._all_bases_known
except AttributeError:
pass
for base in klass.bases:
result = safe_infer(base, context=context)
# TODO: check for A->B->A->B pattern in class structure too?
if (not isinstance(result, scoped_nodes.ClassDef) or
result is klass or
not has_known_bases(result, context=context)):
klass._all_bases_known = False
return False
klass._all_bases_known = True
return True
def _type_check(type1, type2):
if not all(map(has_known_bases, (type1, type2))):
raise exceptions._NonDeducibleTypeHierarchy
if not all([type1.newstyle, type2.newstyle]):
return False
try:
return type1 in type2.mro()[:-1]
except exceptions.MroError:
# The MRO is invalid.
raise exceptions._NonDeducibleTypeHierarchy
def is_subtype(type1, type2):
"""Check if *type1* is a subtype of *typ2*."""
return _type_check(type2, type1)
def is_supertype(type1, type2):
"""Check if *type2* is a supertype of *type1*."""
return _type_check(type1, type2)
def class_instance_as_index(node):
"""Get the value as an index for the given instance.
If an instance provides an __index__ method, then it can
be used in some scenarios where an integer is expected,
for instance when multiplying or subscripting a list.
"""
context = contextmod.InferenceContext()
context.callcontext = contextmod.CallContext(args=[node])
try:
for inferred in node.igetattr('__index__', context=context):
if not isinstance(inferred, bases.BoundMethod):
continue
for result in inferred.infer_call_result(node, context=context):
if (isinstance(result, nodes.Const)
and isinstance(result.value, int)):
return result
except exceptions.InferenceError:
pass
return None

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# Copyright (c) 2006-2011, 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2013-2014 Google, Inc.
# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015-2016 Cara Vinson <ceridwenv@gmail.com>
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/master/COPYING.LESSER
"""this module contains a set of functions to handle inference on astroid trees
"""
import functools
import itertools
import operator
from astroid import bases
from astroid import context as contextmod
from astroid import exceptions
from astroid import decorators
from astroid import helpers
from astroid import manager
from astroid import nodes
from astroid.interpreter import dunder_lookup
from astroid import protocols
from astroid import util
MANAGER = manager.AstroidManager()
# .infer method ###############################################################
def infer_end(self, context=None):
"""inference's end for node such as Module, ClassDef, FunctionDef,
Const...
"""
yield self
nodes.Module._infer = infer_end
nodes.ClassDef._infer = infer_end
nodes.FunctionDef._infer = infer_end
nodes.Lambda._infer = infer_end
nodes.Const._infer = infer_end
nodes.Slice._infer = infer_end
def infer_seq(self, context=None):
if not any(isinstance(e, nodes.Starred) for e in self.elts):
yield self
else:
values = _infer_seq(self, context)
new_seq = type(self)(self.lineno, self.col_offset, self.parent)
new_seq.postinit(values)
yield new_seq
def _infer_seq(node, context=None):
"""Infer all values based on _BaseContainer.elts"""
values = []
for elt in node.elts:
if isinstance(elt, nodes.Starred):
starred = helpers.safe_infer(elt.value, context)
if starred in (None, util.Uninferable):
raise exceptions.InferenceError(node=node,
context=context)
if not hasattr(starred, 'elts'):
raise exceptions.InferenceError(node=node,
context=context)
values.extend(_infer_seq(starred))
else:
values.append(elt)
return values
nodes.List._infer = infer_seq
nodes.Tuple._infer = infer_seq
nodes.Set._infer = infer_seq
def infer_map(self, context=None):
if not any(isinstance(k, nodes.DictUnpack) for k, _ in self.items):
yield self
else:
items = _infer_map(self, context)
new_seq = type(self)(self.lineno, self.col_offset, self.parent)
new_seq.postinit(list(items.items()))
yield new_seq
def _infer_map(node, context):
"""Infer all values based on Dict.items"""
values = {}
for name, value in node.items:
if isinstance(name, nodes.DictUnpack):
double_starred = helpers.safe_infer(value, context)
if double_starred in (None, util.Uninferable):
raise exceptions.InferenceError
if not isinstance(double_starred, nodes.Dict):
raise exceptions.InferenceError(node=node,
context=context)
values.update(_infer_map(double_starred, context))
else:
key = helpers.safe_infer(name, context=context)
value = helpers.safe_infer(value, context=context)
if any(elem in (None, util.Uninferable) for elem in (key, value)):
raise exceptions.InferenceError(node=node,
context=context)
values[key] = value
return values
nodes.Dict._infer = infer_map
def _higher_function_scope(node):
""" Search for the first function which encloses the given
scope. This can be used for looking up in that function's
scope, in case looking up in a lower scope for a particular
name fails.
:param node: A scope node.
:returns:
``None``, if no parent function scope was found,
otherwise an instance of :class:`astroid.scoped_nodes.Function`,
which encloses the given node.
"""
current = node
while current.parent and not isinstance(current.parent, nodes.FunctionDef):
current = current.parent
if current and current.parent:
return current.parent
return None
def infer_name(self, context=None):
"""infer a Name: use name lookup rules"""
frame, stmts = self.lookup(self.name)
if not stmts:
# Try to see if the name is enclosed in a nested function
# and use the higher (first function) scope for searching.
# TODO: should this be promoted to other nodes as well?
parent_function = _higher_function_scope(self.scope())
if parent_function:
_, stmts = parent_function.lookup(self.name)
if not stmts:
raise exceptions.NameInferenceError(name=self.name,
scope=self.scope(),
context=context)
context = context.clone()
context.lookupname = self.name
return bases._infer_stmts(stmts, context, frame)
nodes.Name._infer = decorators.path_wrapper(infer_name)
nodes.AssignName.infer_lhs = infer_name # won't work with a path wrapper
@decorators.raise_if_nothing_inferred
@decorators.path_wrapper
def infer_call(self, context=None):
"""infer a Call node by trying to guess what the function returns"""
callcontext = context.clone()
callcontext.callcontext = contextmod.CallContext(args=self.args,
keywords=self.keywords)
callcontext.boundnode = None
for callee in self.func.infer(context):
if callee is util.Uninferable:
yield callee
continue
try:
if hasattr(callee, 'infer_call_result'):
for inferred in callee.infer_call_result(self, callcontext):
yield inferred
except exceptions.InferenceError:
## XXX log error ?
continue
# Explicit StopIteration to return error information, see comment
# in raise_if_nothing_inferred.
raise StopIteration(dict(node=self, context=context))
nodes.Call._infer = infer_call
@decorators.path_wrapper
def infer_import(self, context=None, asname=True):
"""infer an Import node: return the imported module/object"""
name = context.lookupname
if name is None:
raise exceptions.InferenceError(node=self, context=context)
try:
if asname:
yield self.do_import_module(self.real_name(name))
else:
yield self.do_import_module(name)
except exceptions.AstroidBuildingError as exc:
util.reraise(exceptions.InferenceError(node=self, error=exc,
context=context))
nodes.Import._infer = infer_import
def infer_name_module(self, name):
context = contextmod.InferenceContext()
context.lookupname = name
return self.infer(context, asname=False)
nodes.Import.infer_name_module = infer_name_module
@decorators.path_wrapper
def infer_import_from(self, context=None, asname=True):
"""infer a ImportFrom node: return the imported module/object"""
name = context.lookupname
if name is None:
raise exceptions.InferenceError(node=self, context=context)
if asname:
name = self.real_name(name)
try:
module = self.do_import_module()
except exceptions.AstroidBuildingError as exc:
util.reraise(exceptions.InferenceError(node=self, error=exc,
context=context))
try:
context = contextmod.copy_context(context)
context.lookupname = name
stmts = module.getattr(name, ignore_locals=module is self.root())
return bases._infer_stmts(stmts, context)
except exceptions.AttributeInferenceError as error:
util.reraise(exceptions.InferenceError(
error.message, target=self, attribute=name, context=context))
nodes.ImportFrom._infer = infer_import_from
@decorators.raise_if_nothing_inferred
def infer_attribute(self, context=None):
"""infer an Attribute node by using getattr on the associated object"""
for owner in self.expr.infer(context):
if owner is util.Uninferable:
yield owner
continue
if context and context.boundnode:
# This handles the situation where the attribute is accessed through a subclass
# of a base class and the attribute is defined at the base class's level,
# by taking in consideration a redefinition in the subclass.
if (isinstance(owner, bases.Instance)
and isinstance(context.boundnode, bases.Instance)):
try:
if helpers.is_subtype(helpers.object_type(context.boundnode),
helpers.object_type(owner)):
owner = context.boundnode
except exceptions._NonDeducibleTypeHierarchy:
# Can't determine anything useful.
pass
try:
context.boundnode = owner
for obj in owner.igetattr(self.attrname, context):
yield obj
context.boundnode = None
except (exceptions.AttributeInferenceError, exceptions.InferenceError):
context.boundnode = None
except AttributeError:
# XXX method / function
context.boundnode = None
# Explicit StopIteration to return error information, see comment
# in raise_if_nothing_inferred.
raise StopIteration(dict(node=self, context=context))
nodes.Attribute._infer = decorators.path_wrapper(infer_attribute)
nodes.AssignAttr.infer_lhs = infer_attribute # # won't work with a path wrapper
@decorators.path_wrapper
def infer_global(self, context=None):
if context.lookupname is None:
raise exceptions.InferenceError(node=self, context=context)
try:
return bases._infer_stmts(self.root().getattr(context.lookupname),
context)
except exceptions.AttributeInferenceError as error:
util.reraise(exceptions.InferenceError(
error.message, target=self, attribute=context.lookupname,
context=context))
nodes.Global._infer = infer_global
_SUBSCRIPT_SENTINEL = object()
@decorators.raise_if_nothing_inferred
def infer_subscript(self, context=None):
"""Inference for subscripts
We're understanding if the index is a Const
or a slice, passing the result of inference
to the value's `getitem` method, which should
handle each supported index type accordingly.
"""
value = next(self.value.infer(context))
if value is util.Uninferable:
yield util.Uninferable
return
index = next(self.slice.infer(context))
if index is util.Uninferable:
yield util.Uninferable
return
# Try to deduce the index value.
index_value = _SUBSCRIPT_SENTINEL
if value.__class__ == bases.Instance:
index_value = index
else:
if index.__class__ == bases.Instance:
instance_as_index = helpers.class_instance_as_index(index)
if instance_as_index:
index_value = instance_as_index
else:
index_value = index
if index_value is _SUBSCRIPT_SENTINEL:
raise exceptions.InferenceError(node=self, context=context)
try:
assigned = value.getitem(index_value, context)
except (exceptions.AstroidTypeError,
exceptions.AstroidIndexError,
exceptions.AttributeInferenceError,
AttributeError) as exc:
util.reraise(exceptions.InferenceError(node=self, error=exc,
context=context))
# Prevent inferring if the inferred subscript
# is the same as the original subscripted object.
if self is assigned or assigned is util.Uninferable:
yield util.Uninferable
return
for inferred in assigned.infer(context):
yield inferred
# Explicit StopIteration to return error information, see comment
# in raise_if_nothing_inferred.
raise StopIteration(dict(node=self, context=context))
nodes.Subscript._infer = decorators.path_wrapper(infer_subscript)
nodes.Subscript.infer_lhs = infer_subscript
@decorators.raise_if_nothing_inferred
@decorators.path_wrapper
def _infer_boolop(self, context=None):
"""Infer a boolean operation (and / or / not).
The function will calculate the boolean operation
for all pairs generated through inference for each component
node.
"""
values = self.values
if self.op == 'or':
predicate = operator.truth
else:
predicate = operator.not_
try:
values = [value.infer(context=context) for value in values]
except exceptions.InferenceError:
yield util.Uninferable
return
for pair in itertools.product(*values):
if any(item is util.Uninferable for item in pair):
# Can't infer the final result, just yield Uninferable.
yield util.Uninferable
continue
bool_values = [item.bool_value() for item in pair]
if any(item is util.Uninferable for item in bool_values):
# Can't infer the final result, just yield Uninferable.
yield util.Uninferable
continue
# Since the boolean operations are short circuited operations,
# this code yields the first value for which the predicate is True
# and if no value respected the predicate, then the last value will
# be returned (or Uninferable if there was no last value).
# This is conforming to the semantics of `and` and `or`:
# 1 and 0 -> 1
# 0 and 1 -> 0
# 1 or 0 -> 1
# 0 or 1 -> 1
value = util.Uninferable
for value, bool_value in zip(pair, bool_values):
if predicate(bool_value):
yield value
break
else:
yield value
# Explicit StopIteration to return error information, see comment
# in raise_if_nothing_inferred.
raise StopIteration(dict(node=self, context=context))
nodes.BoolOp._infer = _infer_boolop
# UnaryOp, BinOp and AugAssign inferences
def _filter_operation_errors(self, infer_callable, context, error):
for result in infer_callable(self, context):
if isinstance(result, error):
# For the sake of .infer(), we don't care about operation
# errors, which is the job of pylint. So return something
# which shows that we can't infer the result.
yield util.Uninferable
else:
yield result
def _infer_unaryop(self, context=None):
"""Infer what an UnaryOp should return when evaluated."""
for operand in self.operand.infer(context):
try:
yield operand.infer_unary_op(self.op)
except TypeError as exc:
# The operand doesn't support this operation.
yield util.BadUnaryOperationMessage(operand, self.op, exc)
except AttributeError as exc:
meth = protocols.UNARY_OP_METHOD[self.op]
if meth is None:
# `not node`. Determine node's boolean
# value and negate its result, unless it is
# Uninferable, which will be returned as is.
bool_value = operand.bool_value()
if bool_value is not util.Uninferable:
yield nodes.const_factory(not bool_value)
else:
yield util.Uninferable
else:
if not isinstance(operand, (bases.Instance, nodes.ClassDef)):
# The operation was used on something which
# doesn't support it.
yield util.BadUnaryOperationMessage(operand, self.op, exc)
continue
try:
try:
methods = dunder_lookup.lookup(operand, meth)
except exceptions.AttributeInferenceError:
yield util.BadUnaryOperationMessage(operand, self.op, exc)
continue
meth = methods[0]
inferred = next(meth.infer(context=context))
if inferred is util.Uninferable or not inferred.callable():
continue
context = contextmod.copy_context(context)
context.callcontext = contextmod.CallContext(args=[operand])
call_results = inferred.infer_call_result(self, context=context)
result = next(call_results, None)
if result is None:
# Failed to infer, return the same type.
yield operand
else:
yield result
except exceptions.AttributeInferenceError as exc:
# The unary operation special method was not found.
yield util.BadUnaryOperationMessage(operand, self.op, exc)
except exceptions.InferenceError:
yield util.Uninferable
@decorators.raise_if_nothing_inferred
@decorators.path_wrapper
def infer_unaryop(self, context=None):
"""Infer what an UnaryOp should return when evaluated."""
for inferred in _filter_operation_errors(self, _infer_unaryop, context,
util.BadUnaryOperationMessage):
yield inferred
# Explicit StopIteration to return error information, see comment
# in raise_if_nothing_inferred.
raise StopIteration(dict(node=self, context=context))
nodes.UnaryOp._infer_unaryop = _infer_unaryop
nodes.UnaryOp._infer = infer_unaryop
def _is_not_implemented(const):
"""Check if the given const node is NotImplemented."""
return isinstance(const, nodes.Const) and const.value is NotImplemented
def _invoke_binop_inference(instance, opnode, op, other, context, method_name):
"""Invoke binary operation inference on the given instance."""
methods = dunder_lookup.lookup(instance, method_name)
method = methods[0]
inferred = next(method.infer(context=context))
if inferred is util.Uninferable:
raise exceptions.InferenceError
return instance.infer_binary_op(opnode, op, o