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.idea/.gitignore vendored
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# 默认忽略的文件
/shelf/
/workspace.xml

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Signature: 8a477f597d28d172789f06886806bc55
# This file is a cache directory tag created by pytest.
# For information about cache directory tags, see:
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# pytest cache directory #
This directory contains data from the pytest's cache plugin,
which provides the `--lf` and `--ff` options, as well as the `cache` fixture.
**Do not** commit this to version control.
See [the docs](https://docs.pytest.org/en/stable/how-to/cache.html) for more information.

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[
"tubiao.py::test"
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[]

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.venv/Lib/site-packages/Faker-24.7.1.dist-info/INSTALLER
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pip

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.venv/Lib/site-packages/Faker-24.7.1.dist-info/LICENSE.txt
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Copyright (c) 2012 Daniele Faraglia
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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.venv/Lib/site-packages/Faker-24.7.1.dist-info/METADATA
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Metadata-Version: 2.1
Name: Faker
Version: 24.7.1
Summary: Faker is a Python package that generates fake data for you.
Home-page: https://github.com/joke2k/faker
Author: joke2k
Author-email: joke2k@gmail.com
License: MIT License
Project-URL: Bug Tracker, https://github.com/joke2k/faker/issues
Project-URL: Changes, https://github.com/joke2k/faker/blob/master/CHANGELOG.md
Project-URL: Documentation, http://faker.rtfd.org/
Project-URL: Source Code, https://github.com/joke2k/faker
Keywords: faker fixtures data test mock generator
Platform: any
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Console
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Software Development :: Testing
Classifier: Topic :: Utilities
Classifier: License :: OSI Approved :: MIT License
Requires-Python: >=3.8
License-File: LICENSE.txt
Requires-Dist: python-dateutil (>=2.4)
Requires-Dist: typing-extensions (>=3.10.0.1) ; python_version <= "3.8"
*Faker* is a Python package that generates fake data for you. Whether
you need to bootstrap your database, create good-looking XML documents,
fill-in your persistence to stress test it, or anonymize data taken from
a production service, Faker is for you.
Faker is heavily inspired by `PHP Faker`_, `Perl Faker`_, and by `Ruby Faker`_.
----
::
_|_|_|_| _|
_| _|_|_| _| _| _|_| _| _|_|
_|_|_| _| _| _|_| _|_|_|_| _|_|
_| _| _| _| _| _| _|
_| _|_|_| _| _| _|_|_| _|
|pypi| |build| |coverage| |license|
----
Compatibility
-------------
Starting from version ``4.0.0``, ``Faker`` dropped support for Python 2 and from version ``5.0.0``
only supports Python 3.7 and above. If you still need Python 2 compatibility, please install version ``3.0.1`` in the
meantime, and please consider updating your codebase to support Python 3 so you can enjoy the
latest features ``Faker`` has to offer. Please see the `extended docs`_ for more details, especially
if you are upgrading from version ``2.0.4`` and below as there might be breaking changes.
This package was also previously called ``fake-factory`` which was already deprecated by the end
of 2016, and much has changed since then, so please ensure that your project and its dependencies
do not depend on the old package.
Basic Usage
-----------
Install with pip:
.. code:: bash
pip install Faker
Use ``faker.Faker()`` to create and initialize a faker
generator, which can generate data by accessing properties named after
the type of data you want.
.. code:: python
from faker import Faker
fake = Faker()
fake.name()
# 'Lucy Cechtelar'
fake.address()
# '426 Jordy Lodge
# Cartwrightshire, SC 88120-6700'
fake.text()
# 'Sint velit eveniet. Rerum atque repellat voluptatem quia rerum. Numquam excepturi
# beatae sint laudantium consequatur. Magni occaecati itaque sint et sit tempore. Nesciunt
# amet quidem. Iusto deleniti cum autem ad quia aperiam.
# A consectetur quos aliquam. In iste aliquid et aut similique suscipit. Consequatur qui
# quaerat iste minus hic expedita. Consequuntur error magni et laboriosam. Aut aspernatur
# voluptatem sit aliquam. Dolores voluptatum est.
# Aut molestias et maxime. Fugit autem facilis quos vero. Eius quibusdam possimus est.
# Ea quaerat et quisquam. Deleniti sunt quam. Adipisci consequatur id in occaecati.
# Et sint et. Ut ducimus quod nemo ab voluptatum.'
Each call to method ``fake.name()`` yields a different (random) result.
This is because faker forwards ``faker.Generator.method_name()`` calls
to ``faker.Generator.format(method_name)``.
.. code:: python
for _ in range(10):
print(fake.name())
# 'Adaline Reichel'
# 'Dr. Santa Prosacco DVM'
# 'Noemy Vandervort V'
# 'Lexi O'Conner'
# 'Gracie Weber'
# 'Roscoe Johns'
# 'Emmett Lebsack'
# 'Keegan Thiel'
# 'Wellington Koelpin II'
# 'Ms. Karley Kiehn V'
Pytest fixtures
---------------
``Faker`` also has its own ``pytest`` plugin which provides a ``faker`` fixture you can use in your
tests. Please check out the `pytest fixture docs` to learn more.
Providers
---------
Each of the generator properties (like ``name``, ``address``, and
``lorem``) are called "fake". A faker generator has many of them,
packaged in "providers".
.. code:: python
from faker import Faker
from faker.providers import internet
fake = Faker()
fake.add_provider(internet)
print(fake.ipv4_private())
Check the `extended docs`_ for a list of `bundled providers`_ and a list of
`community providers`_.
Localization
------------
``faker.Faker`` can take a locale as an argument, to return localized
data. If no localized provider is found, the factory falls back to the
default LCID string for US english, ie: ``en_US``.
.. code:: python
from faker import Faker
fake = Faker('it_IT')
for _ in range(10):
print(fake.name())
# 'Elda Palumbo'
# 'Pacifico Giordano'
# 'Sig. Avide Guerra'
# 'Yago Amato'
# 'Eustachio Messina'
# 'Dott. Violante Lombardo'
# 'Sig. Alighieri Monti'
# 'Costanzo Costa'
# 'Nazzareno Barbieri'
# 'Max Coppola'
``faker.Faker`` also supports multiple locales. New in v3.0.0.
.. code:: python
from faker import Faker
fake = Faker(['it_IT', 'en_US', 'ja_JP'])
for _ in range(10):
print(fake.name())
# 鈴木 陽一
# Leslie Moreno
# Emma Williams
# 渡辺 裕美子
# Marcantonio Galuppi
# Martha Davis
# Kristen Turner
# 中津川 春香
# Ashley Castillo
# 山田 桃子
You can check available Faker locales in the source code, under the
providers package. The localization of Faker is an ongoing process, for
which we need your help. Please don't hesitate to create a localized
provider for your own locale and submit a Pull Request (PR).
Optimizations
-------------
The Faker constructor takes a performance-related argument called
``use_weighting``. It specifies whether to attempt to have the frequency
of values match real-world frequencies (e.g. the English name Gary would
be much more frequent than the name Lorimer). If ``use_weighting`` is ``False``,
then all items have an equal chance of being selected, and the selection
process is much faster. The default is ``True``.
Command line usage
------------------
When installed, you can invoke faker from the command-line:
.. code:: console
faker [-h] [--version] [-o output]
[-l {bg_BG,cs_CZ,...,zh_CN,zh_TW}]
[-r REPEAT] [-s SEP]
[-i {package.containing.custom_provider otherpkg.containing.custom_provider}]
[fake] [fake argument [fake argument ...]]
Where:
- ``faker``: is the script when installed in your environment, in
development you could use ``python -m faker`` instead
- ``-h``, ``--help``: shows a help message
- ``--version``: shows the program's version number
- ``-o FILENAME``: redirects the output to the specified filename
- ``-l {bg_BG,cs_CZ,...,zh_CN,zh_TW}``: allows use of a localized
provider
- ``-r REPEAT``: will generate a specified number of outputs
- ``-s SEP``: will generate the specified separator after each
generated output
- ``-i {my.custom_provider other.custom_provider}`` list of additional custom
providers to use. Note that is the import path of the package containing
your Provider class, not the custom Provider class itself.
- ``fake``: is the name of the fake to generate an output for, such as
``name``, ``address``, or ``text``
- ``[fake argument ...]``: optional arguments to pass to the fake (e.g. the
profile fake takes an optional list of comma separated field names as the
first argument)
Examples:
.. code:: console
$ faker address
968 Bahringer Garden Apt. 722
Kristinaland, NJ 09890
$ faker -l de_DE address
Samira-Niemeier-Allee 56
94812 Biedenkopf
$ faker profile ssn,birthdate
{'ssn': '628-10-1085', 'birthdate': '2008-03-29'}
$ faker -r=3 -s=";" name
Willam Kertzmann;
Josiah Maggio;
Gayla Schmitt;
How to create a Provider
------------------------
.. code:: python
from faker import Faker
fake = Faker()
# first, import a similar Provider or use the default one
from faker.providers import BaseProvider
# create new provider class
class MyProvider(BaseProvider):
def foo(self) -> str:
return 'bar'
# then add new provider to faker instance
fake.add_provider(MyProvider)
# now you can use:
fake.foo()
# 'bar'
How to create a Dynamic Provider
--------------------------------
Dynamic providers can read elements from an external source.
.. code:: python
from faker import Faker
from faker.providers import DynamicProvider
medical_professions_provider = DynamicProvider(
provider_name="medical_profession",
elements=["dr.", "doctor", "nurse", "surgeon", "clerk"],
)
fake = Faker()
# then add new provider to faker instance
fake.add_provider(medical_professions_provider)
# now you can use:
fake.medical_profession()
# 'dr.'
How to customize the Lorem Provider
-----------------------------------
You can provide your own sets of words if you don't want to use the
default lorem ipsum one. The following example shows how to do it with a list of words picked from `cakeipsum <http://www.cupcakeipsum.com/>`__ :
.. code:: python
from faker import Faker
fake = Faker()
my_word_list = [
'danish','cheesecake','sugar',
'Lollipop','wafer','Gummies',
'sesame','Jelly','beans',
'pie','bar','Ice','oat' ]
fake.sentence()
# 'Expedita at beatae voluptatibus nulla omnis.'
fake.sentence(ext_word_list=my_word_list)
# 'Oat beans oat Lollipop bar cheesecake.'
How to use with Factory Boy
---------------------------
`Factory Boy` already ships with integration with ``Faker``. Simply use the
``factory.Faker`` method of ``factory_boy``:
.. code:: python
import factory
from myapp.models import Book
class BookFactory(factory.Factory):
class Meta:
model = Book
title = factory.Faker('sentence', nb_words=4)
author_name = factory.Faker('name')
Accessing the `random` instance
-------------------------------
The ``.random`` property on the generator returns the instance of
``random.Random`` used to generate the values:
.. code:: python
from faker import Faker
fake = Faker()
fake.random
fake.random.getstate()
By default all generators share the same instance of ``random.Random``, which
can be accessed with ``from faker.generator import random``. Using this may
be useful for plugins that want to affect all faker instances.
Unique values
-------------
Through use of the ``.unique`` property on the generator, you can guarantee
that any generated values are unique for this specific instance.
.. code:: python
from faker import Faker
fake = Faker()
names = [fake.unique.first_name() for i in range(500)]
assert len(set(names)) == len(names)
Calling ``fake.unique.clear()`` clears the already seen values.
Note, to avoid infinite loops, after a number of attempts to find a unique
value, Faker will throw a ``UniquenessException``. Beware of the `birthday
paradox <https://en.wikipedia.org/wiki/Birthday_problem>`_, collisions
are more likely than you'd think.
.. code:: python
from faker import Faker
fake = Faker()
for i in range(3):
# Raises a UniquenessException
fake.unique.boolean()
In addition, only hashable arguments and return values can be used
with ``.unique``.
Seeding the Generator
---------------------
When using Faker for unit testing, you will often want to generate the same
data set. For convenience, the generator also provides a ``seed()`` method,
which seeds the shared random number generator. A Seed produces the same result
when the same methods with the same version of faker are called.
.. code:: python
from faker import Faker
fake = Faker()
Faker.seed(4321)
print(fake.name())
# 'Margaret Boehm'
Each generator can also be switched to use its own instance of ``random.Random``,
separated from the shared one, by using the ``seed_instance()`` method, which acts
the same way. For example:
.. code:: python
from faker import Faker
fake = Faker()
fake.seed_instance(4321)
print(fake.name())
# 'Margaret Boehm'
Please note that as we keep updating datasets, results are not guaranteed to be
consistent across patch versions. If you hardcode results in your test, make sure
you pinned the version of ``Faker`` down to the patch number.
If you are using ``pytest``, you can seed the ``faker`` fixture by defining a ``faker_seed``
fixture. Please check out the `pytest fixture docs` to learn more.
Tests
-----
Run tests:
.. code:: bash
$ tox
Write documentation for the providers of the default locale:
.. code:: bash
$ python -m faker > docs.txt
Write documentation for the providers of a specific locale:
.. code:: bash
$ python -m faker --lang=de_DE > docs_de.txt
Contribute
----------
Please see `CONTRIBUTING`_.
License
-------
Faker is released under the MIT License. See the bundled `LICENSE`_ file
for details.
Credits
-------
- `FZaninotto`_ / `PHP Faker`_
- `Distribute`_
- `Buildout`_
- `modern-package-template`_
.. _FZaninotto: https://github.com/fzaninotto
.. _PHP Faker: https://github.com/fzaninotto/Faker
.. _Perl Faker: http://search.cpan.org/~jasonk/Data-Faker-0.07/
.. _Ruby Faker: https://github.com/stympy/faker
.. _Distribute: https://pypi.org/project/distribute/
.. _Buildout: http://www.buildout.org/
.. _modern-package-template: https://pypi.org/project/modern-package-template/
.. _extended docs: https://faker.readthedocs.io/en/stable/
.. _bundled providers: https://faker.readthedocs.io/en/stable/providers.html
.. _community providers: https://faker.readthedocs.io/en/stable/communityproviders.html
.. _pytest fixture docs: https://faker.readthedocs.io/en/master/pytest-fixtures.html
.. _LICENSE: https://github.com/joke2k/faker/blob/master/LICENSE.txt
.. _CONTRIBUTING: https://github.com/joke2k/faker/blob/master/CONTRIBUTING.rst
.. _Factory Boy: https://github.com/FactoryBoy/factory_boy
.. |pypi| image:: https://img.shields.io/pypi/v/Faker.svg?style=flat-square&label=version
:target: https://pypi.org/project/Faker/
:alt: Latest version released on PyPI
.. |coverage| image:: https://img.shields.io/coveralls/joke2k/faker/master.svg?style=flat-square
:target: https://coveralls.io/r/joke2k/faker?branch=master
:alt: Test coverage
.. |build| image:: https://github.com/joke2k/faker/actions/workflows/ci.yml/badge.svg
:target: https://github.com/joke2k/faker/actions/workflows/ci.yml
:alt: Build status of the master branch
.. |license| image:: https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square
:target: https://raw.githubusercontent.com/joke2k/faker/master/LICENSE.txt
:alt: Package license

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Wheel-Version: 1.0
Generator: bdist_wheel (0.40.0)
Root-Is-Purelib: true
Tag: py3-none-any

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[console_scripts]
faker = faker.cli:execute_from_command_line
[pytest11]
faker = faker.contrib.pytest.plugin

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faker

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This is a dummy package designed to prevent namesquatting on PyPI. You should install `beautifulsoup4 <https://pypi.python.org/pypi/beautifulsoup4>`_ instead.

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# don't import any costly modules
import sys
import os
is_pypy = '__pypy__' in sys.builtin_module_names
def warn_distutils_present():
if 'distutils' not in sys.modules:
return
if is_pypy and sys.version_info < (3, 7):
# PyPy for 3.6 unconditionally imports distutils, so bypass the warning
# https://foss.heptapod.net/pypy/pypy/-/blob/be829135bc0d758997b3566062999ee8b23872b4/lib-python/3/site.py#L250
return
import warnings
warnings.warn(
"Distutils was imported before Setuptools, but importing Setuptools "
"also replaces the `distutils` module in `sys.modules`. This may lead "
"to undesirable behaviors or errors. To avoid these issues, avoid "
"using distutils directly, ensure that setuptools is installed in the "
"traditional way (e.g. not an editable install), and/or make sure "
"that setuptools is always imported before distutils."
)
def clear_distutils():
if 'distutils' not in sys.modules:
return
import warnings
warnings.warn("Setuptools is replacing distutils.")
mods = [
name
for name in sys.modules
if name == "distutils" or name.startswith("distutils.")
]
for name in mods:
del sys.modules[name]
def enabled():
"""
Allow selection of distutils by environment variable.
"""
which = os.environ.get('SETUPTOOLS_USE_DISTUTILS', 'local')
return which == 'local'
def ensure_local_distutils():
import importlib
clear_distutils()
# With the DistutilsMetaFinder in place,
# perform an import to cause distutils to be
# loaded from setuptools._distutils. Ref #2906.
with shim():
importlib.import_module('distutils')
# check that submodules load as expected
core = importlib.import_module('distutils.core')
assert '_distutils' in core.__file__, core.__file__
assert 'setuptools._distutils.log' not in sys.modules
def do_override():
"""
Ensure that the local copy of distutils is preferred over stdlib.
See https://github.com/pypa/setuptools/issues/417#issuecomment-392298401
for more motivation.
"""
if enabled():
warn_distutils_present()
ensure_local_distutils()
class _TrivialRe:
def __init__(self, *patterns):
self._patterns = patterns
def match(self, string):
return all(pat in string for pat in self._patterns)
class DistutilsMetaFinder:
def find_spec(self, fullname, path, target=None):
# optimization: only consider top level modules and those
# found in the CPython test suite.
if path is not None and not fullname.startswith('test.'):
return
method_name = 'spec_for_{fullname}'.format(**locals())
method = getattr(self, method_name, lambda: None)
return method()
def spec_for_distutils(self):
if self.is_cpython():
return
import importlib
import importlib.abc
import importlib.util
try:
mod = importlib.import_module('setuptools._distutils')
except Exception:
# There are a couple of cases where setuptools._distutils
# may not be present:
# - An older Setuptools without a local distutils is
# taking precedence. Ref #2957.
# - Path manipulation during sitecustomize removes
# setuptools from the path but only after the hook
# has been loaded. Ref #2980.
# In either case, fall back to stdlib behavior.
return
class DistutilsLoader(importlib.abc.Loader):
def create_module(self, spec):
mod.__name__ = 'distutils'
return mod
def exec_module(self, module):
pass
return importlib.util.spec_from_loader(
'distutils', DistutilsLoader(), origin=mod.__file__
)
@staticmethod
def is_cpython():
"""
Suppress supplying distutils for CPython (build and tests).
Ref #2965 and #3007.
"""
return os.path.isfile('pybuilddir.txt')
def spec_for_pip(self):
"""
Ensure stdlib distutils when running under pip.
See pypa/pip#8761 for rationale.
"""
if sys.version_info >= (3, 12) or self.pip_imported_during_build():
return
clear_distutils()
self.spec_for_distutils = lambda: None
@classmethod
def pip_imported_during_build(cls):
"""
Detect if pip is being imported in a build script. Ref #2355.
"""
import traceback
return any(
cls.frame_file_is_setup(frame) for frame, line in traceback.walk_stack(None)
)
@staticmethod
def frame_file_is_setup(frame):
"""
Return True if the indicated frame suggests a setup.py file.
"""
# some frames may not have __file__ (#2940)
return frame.f_globals.get('__file__', '').endswith('setup.py')
def spec_for_sensitive_tests(self):
"""
Ensure stdlib distutils when running select tests under CPython.
python/cpython#91169
"""
clear_distutils()
self.spec_for_distutils = lambda: None
sensitive_tests = (
[
'test.test_distutils',
'test.test_peg_generator',
'test.test_importlib',
]
if sys.version_info < (3, 10)
else [
'test.test_distutils',
]
)
for name in DistutilsMetaFinder.sensitive_tests:
setattr(
DistutilsMetaFinder,
f'spec_for_{name}',
DistutilsMetaFinder.spec_for_sensitive_tests,
)
DISTUTILS_FINDER = DistutilsMetaFinder()
def add_shim():
DISTUTILS_FINDER in sys.meta_path or insert_shim()
class shim:
def __enter__(self):
insert_shim()
def __exit__(self, exc, value, tb):
_remove_shim()
def insert_shim():
sys.meta_path.insert(0, DISTUTILS_FINDER)
def _remove_shim():
try:
sys.meta_path.remove(DISTUTILS_FINDER)
except ValueError:
pass
if sys.version_info < (3, 12):
# DistutilsMetaFinder can only be disabled in Python < 3.12 (PEP 632)
remove_shim = _remove_shim

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__import__('_distutils_hack').do_override()

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"""Patches that are applied at runtime to the virtual environment."""
from __future__ import annotations
import os
import sys
from contextlib import suppress
VIRTUALENV_PATCH_FILE = os.path.join(__file__)
def patch_dist(dist):
"""
Distutils allows user to configure some arguments via a configuration file:
https://docs.python.org/3/install/index.html#distutils-configuration-files.
Some of this arguments though don't make sense in context of the virtual environment files, let's fix them up.
""" # noqa: D205
# we cannot allow some install config as that would get packages installed outside of the virtual environment
old_parse_config_files = dist.Distribution.parse_config_files
def parse_config_files(self, *args, **kwargs):
result = old_parse_config_files(self, *args, **kwargs)
install = self.get_option_dict("install")
if "prefix" in install: # the prefix governs where to install the libraries
install["prefix"] = VIRTUALENV_PATCH_FILE, os.path.abspath(sys.prefix)
for base in ("purelib", "platlib", "headers", "scripts", "data"):
key = f"install_{base}"
if key in install: # do not allow global configs to hijack venv paths
install.pop(key, None)
return result
dist.Distribution.parse_config_files = parse_config_files
# Import hook that patches some modules to ignore configuration values that break package installation in case
# of virtual environments.
_DISTUTILS_PATCH = "distutils.dist", "setuptools.dist"
# https://docs.python.org/3/library/importlib.html#setting-up-an-importer
class _Finder:
"""A meta path finder that allows patching the imported distutils modules."""
fullname = None
# lock[0] is threading.Lock(), but initialized lazily to avoid importing threading very early at startup,
# because there are gevent-based applications that need to be first to import threading by themselves.
# See https://github.com/pypa/virtualenv/issues/1895 for details.
lock = [] # noqa: RUF012
def find_spec(self, fullname, path, target=None): # noqa: ARG002
if fullname in _DISTUTILS_PATCH and self.fullname is None:
# initialize lock[0] lazily
if len(self.lock) == 0:
import threading
lock = threading.Lock()
# there is possibility that two threads T1 and T2 are simultaneously running into find_spec,
# observing .lock as empty, and further going into hereby initialization. However due to the GIL,
# list.append() operation is atomic and this way only one of the threads will "win" to put the lock
# - that every thread will use - into .lock[0].
# https://docs.python.org/3/faq/library.html#what-kinds-of-global-value-mutation-are-thread-safe
self.lock.append(lock)
from functools import partial
from importlib.util import find_spec
with self.lock[0]:
self.fullname = fullname
try:
spec = find_spec(fullname, path)
if spec is not None:
# https://www.python.org/dev/peps/pep-0451/#how-loading-will-work
is_new_api = hasattr(spec.loader, "exec_module")
func_name = "exec_module" if is_new_api else "load_module"
old = getattr(spec.loader, func_name)
func = self.exec_module if is_new_api else self.load_module
if old is not func:
with suppress(AttributeError): # C-Extension loaders are r/o such as zipimporter with <3.7
setattr(spec.loader, func_name, partial(func, old))
return spec
finally:
self.fullname = None
return None
@staticmethod
def exec_module(old, module):
old(module)
if module.__name__ in _DISTUTILS_PATCH:
patch_dist(module)
@staticmethod
def load_module(old, name):
module = old(name)
if module.__name__ in _DISTUTILS_PATCH:
patch_dist(module)
return module
sys.meta_path.insert(0, _Finder())

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pip

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.venv/Lib/site-packages/beautifulsoup4-4.12.3.dist-info/METADATA
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Metadata-Version: 2.1
Name: beautifulsoup4
Version: 4.12.3
Summary: Screen-scraping library
Project-URL: Download, https://www.crummy.com/software/BeautifulSoup/bs4/download/
Project-URL: Homepage, https://www.crummy.com/software/BeautifulSoup/bs4/
Author-email: Leonard Richardson <leonardr@segfault.org>
License: MIT License
License-File: AUTHORS
License-File: LICENSE
Keywords: HTML,XML,parse,soup
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Text Processing :: Markup :: HTML
Classifier: Topic :: Text Processing :: Markup :: SGML
Classifier: Topic :: Text Processing :: Markup :: XML
Requires-Python: >=3.6.0
Requires-Dist: soupsieve>1.2
Provides-Extra: cchardet
Requires-Dist: cchardet; extra == 'cchardet'
Provides-Extra: chardet
Requires-Dist: chardet; extra == 'chardet'
Provides-Extra: charset-normalizer
Requires-Dist: charset-normalizer; extra == 'charset-normalizer'
Provides-Extra: html5lib
Requires-Dist: html5lib; extra == 'html5lib'
Provides-Extra: lxml
Requires-Dist: lxml; extra == 'lxml'
Description-Content-Type: text/markdown
Beautiful Soup is a library that makes it easy to scrape information
from web pages. It sits atop an HTML or XML parser, providing Pythonic
idioms for iterating, searching, and modifying the parse tree.
# Quick start
```
>>> from bs4 import BeautifulSoup
>>> soup = BeautifulSoup("<p>Some<b>bad<i>HTML")
>>> print(soup.prettify())
<html>
<body>
<p>
Some
<b>
bad
<i>
HTML
</i>
</b>
</p>
</body>
</html>
>>> soup.find(text="bad")
'bad'
>>> soup.i
<i>HTML</i>
#
>>> soup = BeautifulSoup("<tag1>Some<tag2/>bad<tag3>XML", "xml")
#
>>> print(soup.prettify())
<?xml version="1.0" encoding="utf-8"?>
<tag1>
Some
<tag2/>
bad
<tag3>
XML
</tag3>
</tag1>
```
To go beyond the basics, [comprehensive documentation is available](https://www.crummy.com/software/BeautifulSoup/bs4/doc/).
# Links
* [Homepage](https://www.crummy.com/software/BeautifulSoup/bs4/)
* [Documentation](https://www.crummy.com/software/BeautifulSoup/bs4/doc/)
* [Discussion group](https://groups.google.com/group/beautifulsoup/)
* [Development](https://code.launchpad.net/beautifulsoup/)
* [Bug tracker](https://bugs.launchpad.net/beautifulsoup/)
* [Complete changelog](https://bazaar.launchpad.net/~leonardr/beautifulsoup/bs4/view/head:/CHANGELOG)
# Note on Python 2 sunsetting
Beautiful Soup's support for Python 2 was discontinued on December 31,
2020: one year after the sunset date for Python 2 itself. From this
point onward, new Beautiful Soup development will exclusively target
Python 3. The final release of Beautiful Soup 4 to support Python 2
was 4.9.3.
# Supporting the project
If you use Beautiful Soup as part of your professional work, please consider a
[Tidelift subscription](https://tidelift.com/subscription/pkg/pypi-beautifulsoup4?utm_source=pypi-beautifulsoup4&utm_medium=referral&utm_campaign=readme).
This will support many of the free software projects your organization
depends on, not just Beautiful Soup.
If you use Beautiful Soup for personal projects, the best way to say
thank you is to read
[Tool Safety](https://www.crummy.com/software/BeautifulSoup/zine/), a zine I
wrote about what Beautiful Soup has taught me about software
development.
# Building the documentation
The bs4/doc/ directory contains full documentation in Sphinx
format. Run `make html` in that directory to create HTML
documentation.
# Running the unit tests
Beautiful Soup supports unit test discovery using Pytest:
```
$ pytest
```

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Behold, mortal, the origins of Beautiful Soup...
================================================
Leonard Richardson is the primary maintainer.
Aaron DeVore and Isaac Muse have made significant contributions to the
code base.
Mark Pilgrim provided the encoding detection code that forms the base
of UnicodeDammit.
Thomas Kluyver and Ezio Melotti finished the work of getting Beautiful
Soup 4 working under Python 3.
Simon Willison wrote soupselect, which was used to make Beautiful Soup
support CSS selectors. Isaac Muse wrote SoupSieve, which made it
possible to _remove_ the CSS selector code from Beautiful Soup.
Sam Ruby helped with a lot of edge cases.
Jonathan Ellis was awarded the prestigious Beau Potage D'Or for his
work in solving the nestable tags conundrum.
An incomplete list of people have contributed patches to Beautiful
Soup:
Istvan Albert, Andrew Lin, Anthony Baxter, Oliver Beattie, Andrew
Boyko, Tony Chang, Francisco Canas, "Delong", Zephyr Fang, Fuzzy,
Roman Gaufman, Yoni Gilad, Richie Hindle, Toshihiro Kamiya, Peteris
Krumins, Kent Johnson, Marek Kapolka, Andreas Kostyrka, Roel Kramer,
Ben Last, Robert Leftwich, Stefaan Lippens, "liquider", Staffan
Malmgren, Ksenia Marasanova, JP Moins, Adam Monsen, John Nagle, "Jon",
Ed Oskiewicz, Martijn Peters, Greg Phillips, Giles Radford, Stefano
Revera, Arthur Rudolph, Marko Samastur, James Salter, Jouni Seppänen,
Alexander Schmolck, Tim Shirley, Geoffrey Sneddon, Ville Skyttä,
"Vikas", Jens Svalgaard, Andy Theyers, Eric Weiser, Glyn Webster, John
Wiseman, Paul Wright, Danny Yoo
An incomplete list of people who made suggestions or found bugs or
found ways to break Beautiful Soup:
Hanno Böck, Matteo Bertini, Chris Curvey, Simon Cusack, Bruce Eckel,
Matt Ernst, Michael Foord, Tom Harris, Bill de hOra, Donald Howes,
Matt Patterson, Scott Roberts, Steve Strassmann, Mike Williams,
warchild at redho dot com, Sami Kuisma, Carlos Rocha, Bob Hutchison,
Joren Mc, Michal Migurski, John Kleven, Tim Heaney, Tripp Lilley, Ed
Summers, Dennis Sutch, Chris Smith, Aaron Swartz, Stuart
Turner, Greg Edwards, Kevin J Kalupson, Nikos Kouremenos, Artur de
Sousa Rocha, Yichun Wei, Per Vognsen

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Beautiful Soup is made available under the MIT license:
Copyright (c) Leonard Richardson
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
Beautiful Soup incorporates code from the html5lib library, which is
also made available under the MIT license. Copyright (c) James Graham
and other contributors
Beautiful Soup has an optional dependency on the soupsieve library,
which is also made available under the MIT license. Copyright (c)
Isaac Muse

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pip

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Metadata-Version: 2.1
Name: bs4
Version: 0.0.2
Summary: Dummy package for Beautiful Soup (beautifulsoup4)
Author-email: Leonard Richardson <leonardr@segfault.org>
License: MIT License
Requires-Dist: beautifulsoup4
Description-Content-Type: text/x-rst
This is a dummy package designed to prevent namesquatting on PyPI. You should install `beautifulsoup4 <https://pypi.python.org/pypi/beautifulsoup4>`_ instead.

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"""Beautiful Soup Elixir and Tonic - "The Screen-Scraper's Friend".
http://www.crummy.com/software/BeautifulSoup/
Beautiful Soup uses a pluggable XML or HTML parser to parse a
(possibly invalid) document into a tree representation. Beautiful Soup
provides methods and Pythonic idioms that make it easy to navigate,
search, and modify the parse tree.
Beautiful Soup works with Python 3.6 and up. It works better if lxml
and/or html5lib is installed.
For more than you ever wanted to know about Beautiful Soup, see the
documentation: http://www.crummy.com/software/BeautifulSoup/bs4/doc/
"""
__author__ = "Leonard Richardson (leonardr@segfault.org)"
__version__ = "4.12.3"
__copyright__ = "Copyright (c) 2004-2024 Leonard Richardson"
# Use of this source code is governed by the MIT license.
__license__ = "MIT"
__all__ = ['BeautifulSoup']
from collections import Counter
import os
import re
import sys
import traceback
import warnings
# The very first thing we do is give a useful error if someone is
# running this code under Python 2.
if sys.version_info.major < 3:
raise ImportError('You are trying to use a Python 3-specific version of Beautiful Soup under Python 2. This will not work. The final version of Beautiful Soup to support Python 2 was 4.9.3.')
from .builder import (
builder_registry,
ParserRejectedMarkup,
XMLParsedAsHTMLWarning,
HTMLParserTreeBuilder
)
from .dammit import UnicodeDammit
from .element import (
CData,
Comment,
CSS,
DEFAULT_OUTPUT_ENCODING,
Declaration,
Doctype,
NavigableString,
PageElement,
ProcessingInstruction,
PYTHON_SPECIFIC_ENCODINGS,
ResultSet,
Script,
Stylesheet,
SoupStrainer,
Tag,
TemplateString,
)
# Define some custom warnings.
class GuessedAtParserWarning(UserWarning):
"""The warning issued when BeautifulSoup has to guess what parser to
use -- probably because no parser was specified in the constructor.
"""
class MarkupResemblesLocatorWarning(UserWarning):
"""The warning issued when BeautifulSoup is given 'markup' that
actually looks like a resource locator -- a URL or a path to a file
on disk.
"""
class BeautifulSoup(Tag):
"""A data structure representing a parsed HTML or XML document.
Most of the methods you'll call on a BeautifulSoup object are inherited from
PageElement or Tag.
Internally, this class defines the basic interface called by the
tree builders when converting an HTML/XML document into a data
structure. The interface abstracts away the differences between
parsers. To write a new tree builder, you'll need to understand
these methods as a whole.
These methods will be called by the BeautifulSoup constructor:
* reset()
* feed(markup)
The tree builder may call these methods from its feed() implementation:
* handle_starttag(name, attrs) # See note about return value
* handle_endtag(name)
* handle_data(data) # Appends to the current data node
* endData(containerClass) # Ends the current data node
No matter how complicated the underlying parser is, you should be
able to build a tree using 'start tag' events, 'end tag' events,
'data' events, and "done with data" events.
If you encounter an empty-element tag (aka a self-closing tag,
like HTML's <br> tag), call handle_starttag and then
handle_endtag.
"""
# Since BeautifulSoup subclasses Tag, it's possible to treat it as
# a Tag with a .name. This name makes it clear the BeautifulSoup
# object isn't a real markup tag.
ROOT_TAG_NAME = '[document]'
# If the end-user gives no indication which tree builder they
# want, look for one with these features.
DEFAULT_BUILDER_FEATURES = ['html', 'fast']
# A string containing all ASCII whitespace characters, used in
# endData() to detect data chunks that seem 'empty'.
ASCII_SPACES = '\x20\x0a\x09\x0c\x0d'
NO_PARSER_SPECIFIED_WARNING = "No parser was explicitly specified, so I'm using the best available %(markup_type)s parser for this system (\"%(parser)s\"). This usually isn't a problem, but if you run this code on another system, or in a different virtual environment, it may use a different parser and behave differently.\n\nThe code that caused this warning is on line %(line_number)s of the file %(filename)s. To get rid of this warning, pass the additional argument 'features=\"%(parser)s\"' to the BeautifulSoup constructor.\n"
def __init__(self, markup="", features=None, builder=None,
parse_only=None, from_encoding=None, exclude_encodings=None,
element_classes=None, **kwargs):
"""Constructor.
:param markup: A string or a file-like object representing
markup to be parsed.
:param features: Desirable features of the parser to be
used. This may be the name of a specific parser ("lxml",
"lxml-xml", "html.parser", or "html5lib") or it may be the
type of markup to be used ("html", "html5", "xml"). It's
recommended that you name a specific parser, so that
Beautiful Soup gives you the same results across platforms
and virtual environments.
:param builder: A TreeBuilder subclass to instantiate (or
instance to use) instead of looking one up based on
`features`. You only need to use this if you've implemented a
custom TreeBuilder.
:param parse_only: A SoupStrainer. Only parts of the document
matching the SoupStrainer will be considered. This is useful
when parsing part of a document that would otherwise be too
large to fit into memory.
:param from_encoding: A string indicating the encoding of the
document to be parsed. Pass this in if Beautiful Soup is
guessing wrongly about the document's encoding.
:param exclude_encodings: A list of strings indicating
encodings known to be wrong. Pass this in if you don't know
the document's encoding but you know Beautiful Soup's guess is
wrong.
:param element_classes: A dictionary mapping BeautifulSoup
classes like Tag and NavigableString, to other classes you'd
like to be instantiated instead as the parse tree is
built. This is useful for subclassing Tag or NavigableString
to modify default behavior.
:param kwargs: For backwards compatibility purposes, the
constructor accepts certain keyword arguments used in
Beautiful Soup 3. None of these arguments do anything in
Beautiful Soup 4; they will result in a warning and then be
ignored.
Apart from this, any keyword arguments passed into the
BeautifulSoup constructor are propagated to the TreeBuilder
constructor. This makes it possible to configure a
TreeBuilder by passing in arguments, not just by saying which
one to use.
"""
if 'convertEntities' in kwargs:
del kwargs['convertEntities']
warnings.warn(
"BS4 does not respect the convertEntities argument to the "
"BeautifulSoup constructor. Entities are always converted "
"to Unicode characters.")
if 'markupMassage' in kwargs:
del kwargs['markupMassage']
warnings.warn(
"BS4 does not respect the markupMassage argument to the "
"BeautifulSoup constructor. The tree builder is responsible "
"for any necessary markup massage.")
if 'smartQuotesTo' in kwargs:
del kwargs['smartQuotesTo']
warnings.warn(
"BS4 does not respect the smartQuotesTo argument to the "
"BeautifulSoup constructor. Smart quotes are always converted "
"to Unicode characters.")
if 'selfClosingTags' in kwargs:
del kwargs['selfClosingTags']
warnings.warn(
"BS4 does not respect the selfClosingTags argument to the "
"BeautifulSoup constructor. The tree builder is responsible "
"for understanding self-closing tags.")
if 'isHTML' in kwargs:
del kwargs['isHTML']
warnings.warn(
"BS4 does not respect the isHTML argument to the "
"BeautifulSoup constructor. Suggest you use "
"features='lxml' for HTML and features='lxml-xml' for "
"XML.")
def deprecated_argument(old_name, new_name):
if old_name in kwargs:
warnings.warn(
'The "%s" argument to the BeautifulSoup constructor '
'has been renamed to "%s."' % (old_name, new_name),
DeprecationWarning, stacklevel=3
)
return kwargs.pop(old_name)
return None
parse_only = parse_only or deprecated_argument(
"parseOnlyThese", "parse_only")
from_encoding = from_encoding or deprecated_argument(
"fromEncoding", "from_encoding")
if from_encoding and isinstance(markup, str):
warnings.warn("You provided Unicode markup but also provided a value for from_encoding. Your from_encoding will be ignored.")
from_encoding = None
self.element_classes = element_classes or dict()
# We need this information to track whether or not the builder
# was specified well enough that we can omit the 'you need to
# specify a parser' warning.
original_builder = builder
original_features = features
if isinstance(builder, type):
# A builder class was passed in; it needs to be instantiated.
builder_class = builder
builder = None
elif builder is None:
if isinstance(features, str):
features = [features]
if features is None or len(features) == 0:
features = self.DEFAULT_BUILDER_FEATURES
builder_class = builder_registry.lookup(*features)
if builder_class is None:
raise FeatureNotFound(
"Couldn't find a tree builder with the features you "
"requested: %s. Do you need to install a parser library?"
% ",".join(features))
# At this point either we have a TreeBuilder instance in
# builder, or we have a builder_class that we can instantiate
# with the remaining **kwargs.
if builder is None:
builder = builder_class(**kwargs)
if not original_builder and not (
original_features == builder.NAME or
original_features in builder.ALTERNATE_NAMES
) and markup:
# The user did not tell us which TreeBuilder to use,
# and we had to guess. Issue a warning.
if builder.is_xml:
markup_type = "XML"
else:
markup_type = "HTML"
# This code adapted from warnings.py so that we get the same line
# of code as our warnings.warn() call gets, even if the answer is wrong
# (as it may be in a multithreading situation).
caller = None
try:
caller = sys._getframe(1)
except ValueError:
pass
if caller:
globals = caller.f_globals
line_number = caller.f_lineno
else:
globals = sys.__dict__
line_number= 1
filename = globals.get('__file__')
if filename:
fnl = filename.lower()
if fnl.endswith((".pyc", ".pyo")):
filename = filename[:-1]
if filename:
# If there is no filename at all, the user is most likely in a REPL,
# and the warning is not necessary.
values = dict(
filename=filename,
line_number=line_number,
parser=builder.NAME,
markup_type=markup_type
)
warnings.warn(
self.NO_PARSER_SPECIFIED_WARNING % values,
GuessedAtParserWarning, stacklevel=2
)
else:
if kwargs:
warnings.warn("Keyword arguments to the BeautifulSoup constructor will be ignored. These would normally be passed into the TreeBuilder constructor, but a TreeBuilder instance was passed in as `builder`.")
self.builder = builder
self.is_xml = builder.is_xml
self.known_xml = self.is_xml
self._namespaces = dict()
self.parse_only = parse_only
if hasattr(markup, 'read'): # It's a file-type object.
markup = markup.read()
elif len(markup) <= 256 and (
(isinstance(markup, bytes) and not b'<' in markup)
or (isinstance(markup, str) and not '<' in markup)
):
# Issue warnings for a couple beginner problems
# involving passing non-markup to Beautiful Soup.
# Beautiful Soup will still parse the input as markup,
# since that is sometimes the intended behavior.
if not self._markup_is_url(markup):
self._markup_resembles_filename(markup)
rejections = []
success = False
for (self.markup, self.original_encoding, self.declared_html_encoding,
self.contains_replacement_characters) in (
self.builder.prepare_markup(
markup, from_encoding, exclude_encodings=exclude_encodings)):
self.reset()
self.builder.initialize_soup(self)
try:
self._feed()
success = True
break
except ParserRejectedMarkup as e:
rejections.append(e)
pass
if not success:
other_exceptions = [str(e) for e in rejections]
raise ParserRejectedMarkup(
"The markup you provided was rejected by the parser. Trying a different parser or a different encoding may help.\n\nOriginal exception(s) from parser:\n " + "\n ".join(other_exceptions)
)
# Clear out the markup and remove the builder's circular
# reference to this object.
self.markup = None
self.builder.soup = None
def _clone(self):
"""Create a new BeautifulSoup object with the same TreeBuilder,
but not associated with any markup.
This is the first step of the deepcopy process.
"""
clone = type(self)("", None, self.builder)
# Keep track of the encoding of the original document,
# since we won't be parsing it again.
clone.original_encoding = self.original_encoding
return clone
def __getstate__(self):
# Frequently a tree builder can't be pickled.
d = dict(self.__dict__)
if 'builder' in d and d['builder'] is not None and not self.builder.picklable:
d['builder'] = type(self.builder)
# Store the contents as a Unicode string.
d['contents'] = []
d['markup'] = self.decode()
# If _most_recent_element is present, it's a Tag object left
# over from initial parse. It might not be picklable and we
# don't need it.
if '_most_recent_element' in d:
del d['_most_recent_element']
return d
def __setstate__(self, state):
# If necessary, restore the TreeBuilder by looking it up.
self.__dict__ = state
if isinstance(self.builder, type):
self.builder = self.builder()
elif not self.builder:
# We don't know which builder was used to build this
# parse tree, so use a default we know is always available.
self.builder = HTMLParserTreeBuilder()
self.builder.soup = self
self.reset()
self._feed()
return state
@classmethod
def _decode_markup(cls, markup):
"""Ensure `markup` is bytes so it's safe to send into warnings.warn.
TODO: warnings.warn had this problem back in 2010 but it might not
anymore.
"""
if isinstance(markup, bytes):
decoded = markup.decode('utf-8', 'replace')
else:
decoded = markup
return decoded
@classmethod
def _markup_is_url(cls, markup):
"""Error-handling method to raise a warning if incoming markup looks
like a URL.
:param markup: A string.
:return: Whether or not the markup resembles a URL
closely enough to justify a warning.
"""
if isinstance(markup, bytes):
space = b' '
cant_start_with = (b"http:", b"https:")
elif isinstance(markup, str):
space = ' '
cant_start_with = ("http:", "https:")
else:
return False
if any(markup.startswith(prefix) for prefix in cant_start_with):
if not space in markup:
warnings.warn(
'The input looks more like a URL than markup. You may want to use'
' an HTTP client like requests to get the document behind'
' the URL, and feed that document to Beautiful Soup.',
MarkupResemblesLocatorWarning,
stacklevel=3
)
return True
return False
@classmethod
def _markup_resembles_filename(cls, markup):
"""Error-handling method to raise a warning if incoming markup
resembles a filename.
:param markup: A bytestring or string.
:return: Whether or not the markup resembles a filename
closely enough to justify a warning.
"""
path_characters = '/\\'
extensions = ['.html', '.htm', '.xml', '.xhtml', '.txt']
if isinstance(markup, bytes):
path_characters = path_characters.encode("utf8")
extensions = [x.encode('utf8') for x in extensions]
filelike = False
if any(x in markup for x in path_characters):
filelike = True
else:
lower = markup.lower()
if any(lower.endswith(ext) for ext in extensions):
filelike = True
if filelike:
warnings.warn(
'The input looks more like a filename than markup. You may'
' want to open this file and pass the filehandle into'
' Beautiful Soup.',
MarkupResemblesLocatorWarning, stacklevel=3
)
return True
return False
def _feed(self):
"""Internal method that parses previously set markup, creating a large
number of Tag and NavigableString objects.
"""
# Convert the document to Unicode.
self.builder.reset()
self.builder.feed(self.markup)
# Close out any unfinished strings and close all the open tags.
self.endData()
while self.currentTag.name != self.ROOT_TAG_NAME:
self.popTag()
def reset(self):
"""Reset this object to a state as though it had never parsed any
markup.
"""
Tag.__init__(self, self, self.builder, self.ROOT_TAG_NAME)
self.hidden = 1
self.builder.reset()
self.current_data = []
self.currentTag = None
self.tagStack = []
self.open_tag_counter = Counter()
self.preserve_whitespace_tag_stack = []
self.string_container_stack = []
self._most_recent_element = None
self.pushTag(self)
def new_tag(self, name, namespace=None, nsprefix=None, attrs={},
sourceline=None, sourcepos=None, **kwattrs):
"""Create a new Tag associated with this BeautifulSoup object.
:param name: The name of the new Tag.
:param namespace: The URI of the new Tag's XML namespace, if any.
:param prefix: The prefix for the new Tag's XML namespace, if any.
:param attrs: A dictionary of this Tag's attribute values; can
be used instead of `kwattrs` for attributes like 'class'
that are reserved words in Python.
:param sourceline: The line number where this tag was
(purportedly) found in its source document.
:param sourcepos: The character position within `sourceline` where this
tag was (purportedly) found.
:param kwattrs: Keyword arguments for the new Tag's attribute values.
"""
kwattrs.update(attrs)
return self.element_classes.get(Tag, Tag)(
None, self.builder, name, namespace, nsprefix, kwattrs,
sourceline=sourceline, sourcepos=sourcepos
)
def string_container(self, base_class=None):
container = base_class or NavigableString
# There may be a general override of NavigableString.
container = self.element_classes.get(
container, container
)
# On top of that, we may be inside a tag that needs a special
# container class.
if self.string_container_stack and container is NavigableString:
container = self.builder.string_containers.get(
self.string_container_stack[-1].name, container
)
return container
def new_string(self, s, subclass=None):
"""Create a new NavigableString associated with this BeautifulSoup
object.
"""
container = self.string_container(subclass)
return container(s)
def insert_before(self, *args):
"""This method is part of the PageElement API, but `BeautifulSoup` doesn't implement
it because there is nothing before or after it in the parse tree.
"""
raise NotImplementedError("BeautifulSoup objects don't support insert_before().")
def insert_after(self, *args):
"""This method is part of the PageElement API, but `BeautifulSoup` doesn't implement
it because there is nothing before or after it in the parse tree.
"""
raise NotImplementedError("BeautifulSoup objects don't support insert_after().")
def popTag(self):
"""Internal method called by _popToTag when a tag is closed."""
tag = self.tagStack.pop()
if tag.name in self.open_tag_counter:
self.open_tag_counter[tag.name] -= 1
if self.preserve_whitespace_tag_stack and tag == self.preserve_whitespace_tag_stack[-1]:
self.preserve_whitespace_tag_stack.pop()
if self.string_container_stack and tag == self.string_container_stack[-1]:
self.string_container_stack.pop()
#print("Pop", tag.name)
if self.tagStack:
self.currentTag = self.tagStack[-1]
return self.currentTag
def pushTag(self, tag):
"""Internal method called by handle_starttag when a tag is opened."""
#print("Push", tag.name)
if self.currentTag is not None:
self.currentTag.contents.append(tag)
self.tagStack.append(tag)
self.currentTag = self.tagStack[-1]
if tag.name != self.ROOT_TAG_NAME:
self.open_tag_counter[tag.name] += 1
if tag.name in self.builder.preserve_whitespace_tags:
self.preserve_whitespace_tag_stack.append(tag)
if tag.name in self.builder.string_containers:
self.string_container_stack.append(tag)
def endData(self, containerClass=None):
"""Method called by the TreeBuilder when the end of a data segment
occurs.
"""
if self.current_data:
current_data = ''.join(self.current_data)
# If whitespace is not preserved, and this string contains
# nothing but ASCII spaces, replace it with a single space
# or newline.
if not self.preserve_whitespace_tag_stack:
strippable = True
for i in current_data:
if i not in self.ASCII_SPACES:
strippable = False
break
if strippable:
if '\n' in current_data:
current_data = '\n'
else:
current_data = ' '
# Reset the data collector.
self.current_data = []
# Should we add this string to the tree at all?
if self.parse_only and len(self.tagStack) <= 1 and \
(not self.parse_only.text or \
not self.parse_only.search(current_data)):
return
containerClass = self.string_container(containerClass)
o = containerClass(current_data)
self.object_was_parsed(o)
def object_was_parsed(self, o, parent=None, most_recent_element=None):
"""Method called by the TreeBuilder to integrate an object into the parse tree."""
if parent is None:
parent = self.currentTag
if most_recent_element is not None:
previous_element = most_recent_element
else:
previous_element = self._most_recent_element
next_element = previous_sibling = next_sibling = None
if isinstance(o, Tag):
next_element = o.next_element
next_sibling = o.next_sibling
previous_sibling = o.previous_sibling
if previous_element is None:
previous_element = o.previous_element
fix = parent.next_element is not None
o.setup(parent, previous_element, next_element, previous_sibling, next_sibling)
self._most_recent_element = o
parent.contents.append(o)
# Check if we are inserting into an already parsed node.
if fix:
self._linkage_fixer(parent)
def _linkage_fixer(self, el):
"""Make sure linkage of this fragment is sound."""
first = el.contents[0]
child = el.contents[-1]
descendant = child
if child is first and el.parent is not None:
# Parent should be linked to first child
el.next_element = child
# We are no longer linked to whatever this element is
prev_el = child.previous_element
if prev_el is not None and prev_el is not el:
prev_el.next_element = None
# First child should be linked to the parent, and no previous siblings.
child.previous_element = el
child.previous_sibling = None
# We have no sibling as we've been appended as the last.
child.next_sibling = None
# This index is a tag, dig deeper for a "last descendant"
if isinstance(child, Tag) and child.contents:
descendant = child._last_descendant(False)
# As the final step, link last descendant. It should be linked
# to the parent's next sibling (if found), else walk up the chain
# and find a parent with a sibling. It should have no next sibling.
descendant.next_element = None
descendant.next_sibling = None
target = el
while True:
if target is None:
break
elif target.next_sibling is not None:
descendant.next_element = target.next_sibling
target.next_sibling.previous_element = child
break
target = target.parent
def _popToTag(self, name, nsprefix=None, inclusivePop=True):
"""Pops the tag stack up to and including the most recent
instance of the given tag.
If there are no open tags with the given name, nothing will be
popped.
:param name: Pop up to the most recent tag with this name.
:param nsprefix: The namespace prefix that goes with `name`.
:param inclusivePop: It this is false, pops the tag stack up
to but *not* including the most recent instqance of the
given tag.
"""
#print("Popping to %s" % name)
if name == self.ROOT_TAG_NAME:
# The BeautifulSoup object itself can never be popped.
return
most_recently_popped = None
stack_size = len(self.tagStack)
for i in range(stack_size - 1, 0, -1):
if not self.open_tag_counter.get(name):
break
t = self.tagStack[i]
if (name == t.name and nsprefix == t.prefix):
if inclusivePop:
most_recently_popped = self.popTag()
break
most_recently_popped = self.popTag()
return most_recently_popped
def handle_starttag(self, name, namespace, nsprefix, attrs, sourceline=None,
sourcepos=None, namespaces=None):
"""Called by the tree builder when a new tag is encountered.
:param name: Name of the tag.
:param nsprefix: Namespace prefix for the tag.
:param attrs: A dictionary of attribute values.
:param sourceline: The line number where this tag was found in its
source document.
:param sourcepos: The character position within `sourceline` where this
tag was found.
:param namespaces: A dictionary of all namespace prefix mappings
currently in scope in the document.
If this method returns None, the tag was rejected by an active
SoupStrainer. You should proceed as if the tag had not occurred
in the document. For instance, if this was a self-closing tag,
don't call handle_endtag.
"""
# print("Start tag %s: %s" % (name, attrs))
self.endData()
if (self.parse_only and len(self.tagStack) <= 1
and (self.parse_only.text
or not self.parse_only.search_tag(name, attrs))):
return None
tag = self.element_classes.get(Tag, Tag)(
self, self.builder, name, namespace, nsprefix, attrs,
self.currentTag, self._most_recent_element,
sourceline=sourceline, sourcepos=sourcepos,
namespaces=namespaces
)
if tag is None:
return tag
if self._most_recent_element is not None:
self._most_recent_element.next_element = tag
self._most_recent_element = tag
self.pushTag(tag)
return tag
def handle_endtag(self, name, nsprefix=None):
"""Called by the tree builder when an ending tag is encountered.
:param name: Name of the tag.
:param nsprefix: Namespace prefix for the tag.
"""
#print("End tag: " + name)
self.endData()
self._popToTag(name, nsprefix)
def handle_data(self, data):
"""Called by the tree builder when a chunk of textual data is encountered."""
self.current_data.append(data)
def decode(self, pretty_print=False,
eventual_encoding=DEFAULT_OUTPUT_ENCODING,
formatter="minimal", iterator=None):
"""Returns a string or Unicode representation of the parse tree
as an HTML or XML document.
:param pretty_print: If this is True, indentation will be used to
make the document more readable.
:param eventual_encoding: The encoding of the final document.
If this is None, the document will be a Unicode string.
"""
if self.is_xml:
# Print the XML declaration
encoding_part = ''
if eventual_encoding in PYTHON_SPECIFIC_ENCODINGS:
# This is a special Python encoding; it can't actually
# go into an XML document because it means nothing
# outside of Python.
eventual_encoding = None
if eventual_encoding != None:
encoding_part = ' encoding="%s"' % eventual_encoding
prefix = '<?xml version="1.0"%s?>\n' % encoding_part
else:
prefix = ''
if not pretty_print:
indent_level = None
else:
indent_level = 0
return prefix + super(BeautifulSoup, self).decode(
indent_level, eventual_encoding, formatter, iterator)
# Aliases to make it easier to get started quickly, e.g. 'from bs4 import _soup'
_s = BeautifulSoup
_soup = BeautifulSoup
class BeautifulStoneSoup(BeautifulSoup):
"""Deprecated interface to an XML parser."""
def __init__(self, *args, **kwargs):
kwargs['features'] = 'xml'
warnings.warn(
'The BeautifulStoneSoup class is deprecated. Instead of using '
'it, pass features="xml" into the BeautifulSoup constructor.',
DeprecationWarning, stacklevel=2
)
super(BeautifulStoneSoup, self).__init__(*args, **kwargs)
class StopParsing(Exception):
"""Exception raised by a TreeBuilder if it's unable to continue parsing."""
pass
class FeatureNotFound(ValueError):
"""Exception raised by the BeautifulSoup constructor if no parser with the
requested features is found.
"""
pass
#If this file is run as a script, act as an HTML pretty-printer.
if __name__ == '__main__':
import sys
soup = BeautifulSoup(sys.stdin)
print((soup.prettify()))

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# Use of this source code is governed by the MIT license.
__license__ = "MIT"
from collections import defaultdict
import itertools
import re
import warnings
import sys
from bs4.element import (
CharsetMetaAttributeValue,
ContentMetaAttributeValue,
RubyParenthesisString,
RubyTextString,
Stylesheet,
Script,
TemplateString,
nonwhitespace_re
)
__all__ = [
'HTMLTreeBuilder',
'SAXTreeBuilder',
'TreeBuilder',
'TreeBuilderRegistry',
]
# Some useful features for a TreeBuilder to have.
FAST = 'fast'
PERMISSIVE = 'permissive'
STRICT = 'strict'
XML = 'xml'
HTML = 'html'
HTML_5 = 'html5'
class XMLParsedAsHTMLWarning(UserWarning):
"""The warning issued when an HTML parser is used to parse
XML that is not XHTML.
"""
MESSAGE = """It looks like you're parsing an XML document using an HTML parser. If this really is an HTML document (maybe it's XHTML?), you can ignore or filter this warning. If it's XML, you should know that using an XML parser will be more reliable. To parse this document as XML, make sure you have the lxml package installed, and pass the keyword argument `features="xml"` into the BeautifulSoup constructor."""
class TreeBuilderRegistry(object):
"""A way of looking up TreeBuilder subclasses by their name or by desired
features.
"""
def __init__(self):
self.builders_for_feature = defaultdict(list)
self.builders = []
def register(self, treebuilder_class):
"""Register a treebuilder based on its advertised features.
:param treebuilder_class: A subclass of Treebuilder. its .features
attribute should list its features.
"""
for feature in treebuilder_class.features:
self.builders_for_feature[feature].insert(0, treebuilder_class)
self.builders.insert(0, treebuilder_class)
def lookup(self, *features):
"""Look up a TreeBuilder subclass with the desired features.
:param features: A list of features to look for. If none are
provided, the most recently registered TreeBuilder subclass
will be used.
:return: A TreeBuilder subclass, or None if there's no
registered subclass with all the requested features.
"""
if len(self.builders) == 0:
# There are no builders at all.
return None
if len(features) == 0:
# They didn't ask for any features. Give them the most
# recently registered builder.
return self.builders[0]
# Go down the list of features in order, and eliminate any builders
# that don't match every feature.
features = list(features)
features.reverse()
candidates = None
candidate_set = None
while len(features) > 0:
feature = features.pop()
we_have_the_feature = self.builders_for_feature.get(feature, [])
if len(we_have_the_feature) > 0:
if candidates is None:
candidates = we_have_the_feature
candidate_set = set(candidates)
else:
# Eliminate any candidates that don't have this feature.
candidate_set = candidate_set.intersection(
set(we_have_the_feature))
# The only valid candidates are the ones in candidate_set.
# Go through the original list of candidates and pick the first one
# that's in candidate_set.
if candidate_set is None:
return None
for candidate in candidates:
if candidate in candidate_set:
return candidate
return None
# The BeautifulSoup class will take feature lists from developers and use them
# to look up builders in this registry.
builder_registry = TreeBuilderRegistry()
class TreeBuilder(object):
"""Turn a textual document into a Beautiful Soup object tree."""
NAME = "[Unknown tree builder]"
ALTERNATE_NAMES = []
features = []
is_xml = False
picklable = False
empty_element_tags = None # A tag will be considered an empty-element
# tag when and only when it has no contents.
# A value for these tag/attribute combinations is a space- or
# comma-separated list of CDATA, rather than a single CDATA.
DEFAULT_CDATA_LIST_ATTRIBUTES = defaultdict(list)
# Whitespace should be preserved inside these tags.
DEFAULT_PRESERVE_WHITESPACE_TAGS = set()
# The textual contents of tags with these names should be
# instantiated with some class other than NavigableString.
DEFAULT_STRING_CONTAINERS = {}
USE_DEFAULT = object()
# Most parsers don't keep track of line numbers.
TRACKS_LINE_NUMBERS = False
def __init__(self, multi_valued_attributes=USE_DEFAULT,
preserve_whitespace_tags=USE_DEFAULT,
store_line_numbers=USE_DEFAULT,
string_containers=USE_DEFAULT,
):
"""Constructor.
:param multi_valued_attributes: If this is set to None, the
TreeBuilder will not turn any values for attributes like
'class' into lists. Setting this to a dictionary will
customize this behavior; look at DEFAULT_CDATA_LIST_ATTRIBUTES
for an example.
Internally, these are called "CDATA list attributes", but that
probably doesn't make sense to an end-user, so the argument name
is `multi_valued_attributes`.
:param preserve_whitespace_tags: A list of tags to treat
the way <pre> tags are treated in HTML. Tags in this list
are immune from pretty-printing; their contents will always be
output as-is.
:param string_containers: A dictionary mapping tag names to
the classes that should be instantiated to contain the textual
contents of those tags. The default is to use NavigableString
for every tag, no matter what the name. You can override the
default by changing DEFAULT_STRING_CONTAINERS.
:param store_line_numbers: If the parser keeps track of the
line numbers and positions of the original markup, that
information will, by default, be stored in each corresponding
`Tag` object. You can turn this off by passing
store_line_numbers=False. If the parser you're using doesn't
keep track of this information, then setting store_line_numbers=True
will do nothing.
"""
self.soup = None
if multi_valued_attributes is self.USE_DEFAULT:
multi_valued_attributes = self.DEFAULT_CDATA_LIST_ATTRIBUTES
self.cdata_list_attributes = multi_valued_attributes
if preserve_whitespace_tags is self.USE_DEFAULT:
preserve_whitespace_tags = self.DEFAULT_PRESERVE_WHITESPACE_TAGS
self.preserve_whitespace_tags = preserve_whitespace_tags
if store_line_numbers == self.USE_DEFAULT:
store_line_numbers = self.TRACKS_LINE_NUMBERS
self.store_line_numbers = store_line_numbers
if string_containers == self.USE_DEFAULT:
string_containers = self.DEFAULT_STRING_CONTAINERS
self.string_containers = string_containers
def initialize_soup(self, soup):
"""The BeautifulSoup object has been initialized and is now
being associated with the TreeBuilder.
:param soup: A BeautifulSoup object.
"""
self.soup = soup
def reset(self):
"""Do any work necessary to reset the underlying parser
for a new document.
By default, this does nothing.
"""
pass
def can_be_empty_element(self, tag_name):
"""Might a tag with this name be an empty-element tag?
The final markup may or may not actually present this tag as
self-closing.
For instance: an HTMLBuilder does not consider a <p> tag to be
an empty-element tag (it's not in
HTMLBuilder.empty_element_tags). This means an empty <p> tag
will be presented as "<p></p>", not "<p/>" or "<p>".
The default implementation has no opinion about which tags are
empty-element tags, so a tag will be presented as an
empty-element tag if and only if it has no children.
"<foo></foo>" will become "<foo/>", and "<foo>bar</foo>" will
be left alone.
:param tag_name: The name of a markup tag.
"""
if self.empty_element_tags is None:
return True
return tag_name in self.empty_element_tags
def feed(self, markup):
"""Run some incoming markup through some parsing process,
populating the `BeautifulSoup` object in self.soup.
This method is not implemented in TreeBuilder; it must be
implemented in subclasses.
:return: None.
"""
raise NotImplementedError()
def prepare_markup(self, markup, user_specified_encoding=None,
document_declared_encoding=None, exclude_encodings=None):
"""Run any preliminary steps necessary to make incoming markup
acceptable to the parser.
:param markup: Some markup -- probably a bytestring.
:param user_specified_encoding: The user asked to try this encoding.
:param document_declared_encoding: The markup itself claims to be
in this encoding. NOTE: This argument is not used by the
calling code and can probably be removed.
:param exclude_encodings: The user asked _not_ to try any of
these encodings.
:yield: A series of 4-tuples:
(markup, encoding, declared encoding,
has undergone character replacement)
Each 4-tuple represents a strategy for converting the
document to Unicode and parsing it. Each strategy will be tried
in turn.
By default, the only strategy is to parse the markup
as-is. See `LXMLTreeBuilderForXML` and
`HTMLParserTreeBuilder` for implementations that take into
account the quirks of particular parsers.
"""
yield markup, None, None, False
def test_fragment_to_document(self, fragment):
"""Wrap an HTML fragment to make it look like a document.
Different parsers do this differently. For instance, lxml
introduces an empty <head> tag, and html5lib
doesn't. Abstracting this away lets us write simple tests
which run HTML fragments through the parser and compare the
results against other HTML fragments.
This method should not be used outside of tests.
:param fragment: A string -- fragment of HTML.
:return: A string -- a full HTML document.
"""
return fragment
def set_up_substitutions(self, tag):
"""Set up any substitutions that will need to be performed on
a `Tag` when it's output as a string.
By default, this does nothing. See `HTMLTreeBuilder` for a
case where this is used.
:param tag: A `Tag`
:return: Whether or not a substitution was performed.
"""
return False
def _replace_cdata_list_attribute_values(self, tag_name, attrs):
"""When an attribute value is associated with a tag that can
have multiple values for that attribute, convert the string
value to a list of strings.
Basically, replaces class="foo bar" with class=["foo", "bar"]
NOTE: This method modifies its input in place.
:param tag_name: The name of a tag.
:param attrs: A dictionary containing the tag's attributes.
Any appropriate attribute values will be modified in place.
"""
if not attrs:
return attrs
if self.cdata_list_attributes:
universal = self.cdata_list_attributes.get('*', [])
tag_specific = self.cdata_list_attributes.get(
tag_name.lower(), None)
for attr in list(attrs.keys()):
if attr in universal or (tag_specific and attr in tag_specific):
# We have a "class"-type attribute whose string
# value is a whitespace-separated list of
# values. Split it into a list.
value = attrs[attr]
if isinstance(value, str):
values = nonwhitespace_re.findall(value)
else:
# html5lib sometimes calls setAttributes twice
# for the same tag when rearranging the parse
# tree. On the second call the attribute value
# here is already a list. If this happens,
# leave the value alone rather than trying to
# split it again.
values = value
attrs[attr] = values
return attrs
class SAXTreeBuilder(TreeBuilder):
"""A Beautiful Soup treebuilder that listens for SAX events.
This is not currently used for anything, but it demonstrates
how a simple TreeBuilder would work.
"""
def feed(self, markup):
raise NotImplementedError()
def close(self):
pass
def startElement(self, name, attrs):
attrs = dict((key[1], value) for key, value in list(attrs.items()))
#print("Start %s, %r" % (name, attrs))
self.soup.handle_starttag(name, attrs)
def endElement(self, name):
#print("End %s" % name)
self.soup.handle_endtag(name)
def startElementNS(self, nsTuple, nodeName, attrs):
# Throw away (ns, nodeName) for now.
self.startElement(nodeName, attrs)
def endElementNS(self, nsTuple, nodeName):
# Throw away (ns, nodeName) for now.
self.endElement(nodeName)
#handler.endElementNS((ns, node.nodeName), node.nodeName)
def startPrefixMapping(self, prefix, nodeValue):
# Ignore the prefix for now.
pass
def endPrefixMapping(self, prefix):
# Ignore the prefix for now.
# handler.endPrefixMapping(prefix)
pass
def characters(self, content):
self.soup.handle_data(content)
def startDocument(self):
pass
def endDocument(self):
pass
class HTMLTreeBuilder(TreeBuilder):
"""This TreeBuilder knows facts about HTML.
Such as which tags are empty-element tags.
"""
empty_element_tags = set([
# These are from HTML5.
'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr',
# These are from earlier versions of HTML and are removed in HTML5.
'basefont', 'bgsound', 'command', 'frame', 'image', 'isindex', 'nextid', 'spacer'
])
# The HTML standard defines these as block-level elements. Beautiful
# Soup does not treat these elements differently from other elements,
# but it may do so eventually, and this information is available if
# you need to use it.
block_elements = set(["address", "article", "aside", "blockquote", "canvas", "dd", "div", "dl", "dt", "fieldset", "figcaption", "figure", "footer", "form", "h1", "h2", "h3", "h4", "h5", "h6", "header", "hr", "li", "main", "nav", "noscript", "ol", "output", "p", "pre", "section", "table", "tfoot", "ul", "video"])
# These HTML tags need special treatment so they can be
# represented by a string class other than NavigableString.
#
# For some of these tags, it's because the HTML standard defines
# an unusual content model for them. I made this list by going
# through the HTML spec
# (https://html.spec.whatwg.org/#metadata-content) and looking for
# "metadata content" elements that can contain strings.
#
# The Ruby tags (<rt> and <rp>) are here despite being normal
# "phrasing content" tags, because the content they contain is
# qualitatively different from other text in the document, and it
# can be useful to be able to distinguish it.
#
# TODO: Arguably <noscript> could go here but it seems
# qualitatively different from the other tags.
DEFAULT_STRING_CONTAINERS = {
'rt' : RubyTextString,
'rp' : RubyParenthesisString,
'style': Stylesheet,
'script': Script,
'template': TemplateString,
}
# The HTML standard defines these attributes as containing a
# space-separated list of values, not a single value. That is,
# class="foo bar" means that the 'class' attribute has two values,
# 'foo' and 'bar', not the single value 'foo bar'. When we
# encounter one of these attributes, we will parse its value into
# a list of values if possible. Upon output, the list will be
# converted back into a string.
DEFAULT_CDATA_LIST_ATTRIBUTES = {
"*" : ['class', 'accesskey', 'dropzone'],
"a" : ['rel', 'rev'],
"link" : ['rel', 'rev'],
"td" : ["headers"],
"th" : ["headers"],
"td" : ["headers"],
"form" : ["accept-charset"],
"object" : ["archive"],
# These are HTML5 specific, as are *.accesskey and *.dropzone above.
"area" : ["rel"],
"icon" : ["sizes"],
"iframe" : ["sandbox"],
"output" : ["for"],
}
DEFAULT_PRESERVE_WHITESPACE_TAGS = set(['pre', 'textarea'])
def set_up_substitutions(self, tag):
"""Replace the declared encoding in a <meta> tag with a placeholder,
to be substituted when the tag is output to a string.
An HTML document may come in to Beautiful Soup as one
encoding, but exit in a different encoding, and the <meta> tag
needs to be changed to reflect this.
:param tag: A `Tag`
:return: Whether or not a substitution was performed.
"""
# We are only interested in <meta> tags
if tag.name != 'meta':
return False
http_equiv = tag.get('http-equiv')
content = tag.get('content')
charset = tag.get('charset')
# We are interested in <meta> tags that say what encoding the
# document was originally in. This means HTML 5-style <meta>
# tags that provide the "charset" attribute. It also means
# HTML 4-style <meta> tags that provide the "content"
# attribute and have "http-equiv" set to "content-type".
#
# In both cases we will replace the value of the appropriate
# attribute with a standin object that can take on any
# encoding.
meta_encoding = None
if charset is not None:
# HTML 5 style:
# <meta charset="utf8">
meta_encoding = charset
tag['charset'] = CharsetMetaAttributeValue(charset)
elif (content is not None and http_equiv is not None
and http_equiv.lower() == 'content-type'):
# HTML 4 style:
# <meta http-equiv="content-type" content="text/html; charset=utf8">
tag['content'] = ContentMetaAttributeValue(content)
return (meta_encoding is not None)
class DetectsXMLParsedAsHTML(object):
"""A mixin class for any class (a TreeBuilder, or some class used by a
TreeBuilder) that's in a position to detect whether an XML
document is being incorrectly parsed as HTML, and issue an
appropriate warning.
This requires being able to observe an incoming processing
instruction that might be an XML declaration, and also able to
observe tags as they're opened. If you can't do that for a given
TreeBuilder, there's a less reliable implementation based on
examining the raw markup.
"""
# Regular expression for seeing if markup has an <html> tag.
LOOKS_LIKE_HTML = re.compile("<[^ +]html", re.I)
LOOKS_LIKE_HTML_B = re.compile(b"<[^ +]html", re.I)
XML_PREFIX = '<?xml'
XML_PREFIX_B = b'<?xml'
@classmethod
def warn_if_markup_looks_like_xml(cls, markup, stacklevel=3):
"""Perform a check on some markup to see if it looks like XML
that's not XHTML. If so, issue a warning.
This is much less reliable than doing the check while parsing,
but some of the tree builders can't do that.
:param stacklevel: The stacklevel of the code calling this
function.
:return: True if the markup looks like non-XHTML XML, False
otherwise.
"""
if isinstance(markup, bytes):
prefix = cls.XML_PREFIX_B
looks_like_html = cls.LOOKS_LIKE_HTML_B
else:
prefix = cls.XML_PREFIX
looks_like_html = cls.LOOKS_LIKE_HTML
if (markup is not None
and markup.startswith(prefix)
and not looks_like_html.search(markup[:500])
):
cls._warn(stacklevel=stacklevel+2)
return True
return False
@classmethod
def _warn(cls, stacklevel=5):
"""Issue a warning about XML being parsed as HTML."""
warnings.warn(
XMLParsedAsHTMLWarning.MESSAGE, XMLParsedAsHTMLWarning,
stacklevel=stacklevel
)
def _initialize_xml_detector(self):
"""Call this method before parsing a document."""
self._first_processing_instruction = None
self._root_tag = None
def _document_might_be_xml(self, processing_instruction):
"""Call this method when encountering an XML declaration, or a
"processing instruction" that might be an XML declaration.
"""
if (self._first_processing_instruction is not None
or self._root_tag is not None):
# The document has already started. Don't bother checking
# anymore.
return
self._first_processing_instruction = processing_instruction
# We won't know until we encounter the first tag whether or
# not this is actually a problem.
def _root_tag_encountered(self, name):
"""Call this when you encounter the document's root tag.
This is where we actually check whether an XML document is
being incorrectly parsed as HTML, and issue the warning.
"""
if self._root_tag is not None:
# This method was incorrectly called multiple times. Do
# nothing.
return
self._root_tag = name
if (name != 'html' and self._first_processing_instruction is not None
and self._first_processing_instruction.lower().startswith('xml ')):
# We encountered an XML declaration and then a tag other
# than 'html'. This is a reliable indicator that a
# non-XHTML document is being parsed as XML.
self._warn()
def register_treebuilders_from(module):
"""Copy TreeBuilders from the given module into this module."""
this_module = sys.modules[__name__]
for name in module.__all__:
obj = getattr(module, name)
if issubclass(obj, TreeBuilder):
setattr(this_module, name, obj)
this_module.__all__.append(name)
# Register the builder while we're at it.
this_module.builder_registry.register(obj)
class ParserRejectedMarkup(Exception):
"""An Exception to be raised when the underlying parser simply
refuses to parse the given markup.
"""
def __init__(self, message_or_exception):
"""Explain why the parser rejected the given markup, either
with a textual explanation or another exception.
"""
if isinstance(message_or_exception, Exception):
e = message_or_exception
message_or_exception = "%s: %s" % (e.__class__.__name__, str(e))
super(ParserRejectedMarkup, self).__init__(message_or_exception)
# Builders are registered in reverse order of priority, so that custom
# builder registrations will take precedence. In general, we want lxml
# to take precedence over html5lib, because it's faster. And we only
# want to use HTMLParser as a last resort.
from . import _htmlparser
register_treebuilders_from(_htmlparser)
try:
from . import _html5lib
register_treebuilders_from(_html5lib)
except ImportError:
# They don't have html5lib installed.
pass
try:
from . import _lxml
register_treebuilders_from(_lxml)
except ImportError:
# They don't have lxml installed.
pass

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# Use of this source code is governed by the MIT license.
__license__ = "MIT"
__all__ = [
'HTML5TreeBuilder',
]
import warnings
import re
from bs4.builder import (
DetectsXMLParsedAsHTML,
PERMISSIVE,
HTML,
HTML_5,
HTMLTreeBuilder,
)
from bs4.element import (
NamespacedAttribute,
nonwhitespace_re,
)
import html5lib
from html5lib.constants import (
namespaces,
prefixes,
)
from bs4.element import (
Comment,
Doctype,
NavigableString,
Tag,
)
try:
# Pre-0.99999999
from html5lib.treebuilders import _base as treebuilder_base
new_html5lib = False
except ImportError as e:
# 0.99999999 and up
from html5lib.treebuilders import base as treebuilder_base
new_html5lib = True
class HTML5TreeBuilder(HTMLTreeBuilder):
"""Use html5lib to build a tree.
Note that this TreeBuilder does not support some features common
to HTML TreeBuilders. Some of these features could theoretically
be implemented, but at the very least it's quite difficult,
because html5lib moves the parse tree around as it's being built.
* This TreeBuilder doesn't use different subclasses of NavigableString
based on the name of the tag in which the string was found.
* You can't use a SoupStrainer to parse only part of a document.
"""
NAME = "html5lib"
features = [NAME, PERMISSIVE, HTML_5, HTML]
# html5lib can tell us which line number and position in the
# original file is the source of an element.
TRACKS_LINE_NUMBERS = True
def prepare_markup(self, markup, user_specified_encoding,
document_declared_encoding=None, exclude_encodings=None):
# Store the user-specified encoding for use later on.
self.user_specified_encoding = user_specified_encoding
# document_declared_encoding and exclude_encodings aren't used
# ATM because the html5lib TreeBuilder doesn't use
# UnicodeDammit.
if exclude_encodings:
warnings.warn(
"You provided a value for exclude_encoding, but the html5lib tree builder doesn't support exclude_encoding.",
stacklevel=3
)
# html5lib only parses HTML, so if it's given XML that's worth
# noting.
DetectsXMLParsedAsHTML.warn_if_markup_looks_like_xml(
markup, stacklevel=3
)
yield (markup, None, None, False)
# These methods are defined by Beautiful Soup.
def feed(self, markup):
if self.soup.parse_only is not None:
warnings.warn(
"You provided a value for parse_only, but the html5lib tree builder doesn't support parse_only. The entire document will be parsed.",
stacklevel=4
)
parser = html5lib.HTMLParser(tree=self.create_treebuilder)
self.underlying_builder.parser = parser
extra_kwargs = dict()
if not isinstance(markup, str):
if new_html5lib:
extra_kwargs['override_encoding'] = self.user_specified_encoding
else:
extra_kwargs['encoding'] = self.user_specified_encoding
doc = parser.parse(markup, **extra_kwargs)
# Set the character encoding detected by the tokenizer.
if isinstance(markup, str):
# We need to special-case this because html5lib sets
# charEncoding to UTF-8 if it gets Unicode input.
doc.original_encoding = None
else:
original_encoding = parser.tokenizer.stream.charEncoding[0]
if not isinstance(original_encoding, str):
# In 0.99999999 and up, the encoding is an html5lib
# Encoding object. We want to use a string for compatibility
# with other tree builders.
original_encoding = original_encoding.name
doc.original_encoding = original_encoding
self.underlying_builder.parser = None
def create_treebuilder(self, namespaceHTMLElements):
self.underlying_builder = TreeBuilderForHtml5lib(
namespaceHTMLElements, self.soup,
store_line_numbers=self.store_line_numbers
)
return self.underlying_builder
def test_fragment_to_document(self, fragment):
"""See `TreeBuilder`."""
return '<html><head></head><body>%s</body></html>' % fragment
class TreeBuilderForHtml5lib(treebuilder_base.TreeBuilder):
def __init__(self, namespaceHTMLElements, soup=None,
store_line_numbers=True, **kwargs):
if soup:
self.soup = soup
else:
from bs4 import BeautifulSoup
# TODO: Why is the parser 'html.parser' here? To avoid an
# infinite loop?
self.soup = BeautifulSoup(
"", "html.parser", store_line_numbers=store_line_numbers,
**kwargs
)
# TODO: What are **kwargs exactly? Should they be passed in
# here in addition to/instead of being passed to the BeautifulSoup
# constructor?
super(TreeBuilderForHtml5lib, self).__init__(namespaceHTMLElements)
# This will be set later to an html5lib.html5parser.HTMLParser
# object, which we can use to track the current line number.
self.parser = None
self.store_line_numbers = store_line_numbers
def documentClass(self):
self.soup.reset()
return Element(self.soup, self.soup, None)
def insertDoctype(self, token):
name = token["name"]
publicId = token["publicId"]
systemId = token["systemId"]
doctype = Doctype.for_name_and_ids(name, publicId, systemId)
self.soup.object_was_parsed(doctype)
def elementClass(self, name, namespace):
kwargs = {}
if self.parser and self.store_line_numbers:
# This represents the point immediately after the end of the
# tag. We don't know when the tag started, but we do know
# where it ended -- the character just before this one.
sourceline, sourcepos = self.parser.tokenizer.stream.position()
kwargs['sourceline'] = sourceline
kwargs['sourcepos'] = sourcepos-1
tag = self.soup.new_tag(name, namespace, **kwargs)
return Element(tag, self.soup, namespace)
def commentClass(self, data):
return TextNode(Comment(data), self.soup)
def fragmentClass(self):
from bs4 import BeautifulSoup
# TODO: Why is the parser 'html.parser' here? To avoid an
# infinite loop?
self.soup = BeautifulSoup("", "html.parser")
self.soup.name = "[document_fragment]"
return Element(self.soup, self.soup, None)
def appendChild(self, node):
# XXX This code is not covered by the BS4 tests.
self.soup.append(node.element)
def getDocument(self):
return self.soup
def getFragment(self):
return treebuilder_base.TreeBuilder.getFragment(self).element
def testSerializer(self, element):
from bs4 import BeautifulSoup
rv = []
doctype_re = re.compile(r'^(.*?)(?: PUBLIC "(.*?)"(?: "(.*?)")?| SYSTEM "(.*?)")?$')
def serializeElement(element, indent=0):
if isinstance(element, BeautifulSoup):
pass
if isinstance(element, Doctype):
m = doctype_re.match(element)
if m:
name = m.group(1)
if m.lastindex > 1:
publicId = m.group(2) or ""
systemId = m.group(3) or m.group(4) or ""
rv.append("""|%s<!DOCTYPE %s "%s" "%s">""" %
(' ' * indent, name, publicId, systemId))
else:
rv.append("|%s<!DOCTYPE %s>" % (' ' * indent, name))
else:
rv.append("|%s<!DOCTYPE >" % (' ' * indent,))
elif isinstance(element, Comment):
rv.append("|%s<!-- %s -->" % (' ' * indent, element))
elif isinstance(element, NavigableString):
rv.append("|%s\"%s\"" % (' ' * indent, element))
else:
if element.namespace:
name = "%s %s" % (prefixes[element.namespace],
element.name)
else:
name = element.name
rv.append("|%s<%s>" % (' ' * indent, name))
if element.attrs:
attributes = []
for name, value in list(element.attrs.items()):
if isinstance(name, NamespacedAttribute):
name = "%s %s" % (prefixes[name.namespace], name.name)
if isinstance(value, list):
value = " ".join(value)
attributes.append((name, value))
for name, value in sorted(attributes):
rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
indent += 2
for child in element.children:
serializeElement(child, indent)
serializeElement(element, 0)
return "\n".join(rv)
class AttrList(object):
def __init__(self, element):
self.element = element
self.attrs = dict(self.element.attrs)
def __iter__(self):
return list(self.attrs.items()).__iter__()
def __setitem__(self, name, value):
# If this attribute is a multi-valued attribute for this element,
# turn its value into a list.
list_attr = self.element.cdata_list_attributes or {}
if (name in list_attr.get('*', [])
or (self.element.name in list_attr
and name in list_attr.get(self.element.name, []))):
# A node that is being cloned may have already undergone
# this procedure.
if not isinstance(value, list):
value = nonwhitespace_re.findall(value)
self.element[name] = value
def items(self):
return list(self.attrs.items())
def keys(self):
return list(self.attrs.keys())
def __len__(self):
return len(self.attrs)
def __getitem__(self, name):
return self.attrs[name]
def __contains__(self, name):
return name in list(self.attrs.keys())
class Element(treebuilder_base.Node):
def __init__(self, element, soup, namespace):
treebuilder_base.Node.__init__(self, element.name)
self.element = element
self.soup = soup
self.namespace = namespace
def appendChild(self, node):
string_child = child = None
if isinstance(node, str):
# Some other piece of code decided to pass in a string
# instead of creating a TextElement object to contain the
# string.
string_child = child = node
elif isinstance(node, Tag):
# Some other piece of code decided to pass in a Tag
# instead of creating an Element object to contain the
# Tag.
child = node
elif node.element.__class__ == NavigableString:
string_child = child = node.element
node.parent = self
else:
child = node.element
node.parent = self
if not isinstance(child, str) and child.parent is not None:
node.element.extract()
if (string_child is not None and self.element.contents
and self.element.contents[-1].__class__ == NavigableString):
# We are appending a string onto another string.
# TODO This has O(n^2) performance, for input like
# "a</a>a</a>a</a>..."
old_element = self.element.contents[-1]
new_element = self.soup.new_string(old_element + string_child)
old_element.replace_with(new_element)
self.soup._most_recent_element = new_element
else:
if isinstance(node, str):
# Create a brand new NavigableString from this string.
child = self.soup.new_string(node)
# Tell Beautiful Soup to act as if it parsed this element
# immediately after the parent's last descendant. (Or
# immediately after the parent, if it has no children.)
if self.element.contents:
most_recent_element = self.element._last_descendant(False)
elif self.element.next_element is not None:
# Something from further ahead in the parse tree is
# being inserted into this earlier element. This is
# very annoying because it means an expensive search
# for the last element in the tree.
most_recent_element = self.soup._last_descendant()
else:
most_recent_element = self.element
self.soup.object_was_parsed(
child, parent=self.element,
most_recent_element=most_recent_element)
def getAttributes(self):
if isinstance(self.element, Comment):
return {}
return AttrList(self.element)
def setAttributes(self, attributes):
if attributes is not None and len(attributes) > 0:
converted_attributes = []
for name, value in list(attributes.items()):
if isinstance(name, tuple):
new_name = NamespacedAttribute(*name)
del attributes[name]
attributes[new_name] = value
self.soup.builder._replace_cdata_list_attribute_values(
self.name, attributes)
for name, value in list(attributes.items()):
self.element[name] = value
# The attributes may contain variables that need substitution.
# Call set_up_substitutions manually.
#
# The Tag constructor called this method when the Tag was created,
# but we just set/changed the attributes, so call it again.
self.soup.builder.set_up_substitutions(self.element)
attributes = property(getAttributes, setAttributes)
def insertText(self, data, insertBefore=None):
text = TextNode(self.soup.new_string(data), self.soup)
if insertBefore:
self.insertBefore(text, insertBefore)
else:
self.appendChild(text)
def insertBefore(self, node, refNode):
index = self.element.index(refNode.element)
if (node.element.__class__ == NavigableString and self.element.contents
and self.element.contents[index-1].__class__ == NavigableString):
# (See comments in appendChild)
old_node = self.element.contents[index-1]
new_str = self.soup.new_string(old_node + node.element)
old_node.replace_with(new_str)
else:
self.element.insert(index, node.element)
node.parent = self
def removeChild(self, node):
node.element.extract()
def reparentChildren(self, new_parent):
"""Move all of this tag's children into another tag."""
# print("MOVE", self.element.contents)
# print("FROM", self.element)
# print("TO", new_parent.element)
element = self.element
new_parent_element = new_parent.element
# Determine what this tag's next_element will be once all the children
# are removed.
final_next_element = element.next_sibling
new_parents_last_descendant = new_parent_element._last_descendant(False, False)
if len(new_parent_element.contents) > 0:
# The new parent already contains children. We will be
# appending this tag's children to the end.
new_parents_last_child = new_parent_element.contents[-1]
new_parents_last_descendant_next_element = new_parents_last_descendant.next_element
else:
# The new parent contains no children.
new_parents_last_child = None
new_parents_last_descendant_next_element = new_parent_element.next_element
to_append = element.contents
if len(to_append) > 0:
# Set the first child's previous_element and previous_sibling
# to elements within the new parent
first_child = to_append[0]
if new_parents_last_descendant is not None:
first_child.previous_element = new_parents_last_descendant
else:
first_child.previous_element = new_parent_element
first_child.previous_sibling = new_parents_last_child
if new_parents_last_descendant is not None:
new_parents_last_descendant.next_element = first_child
else:
new_parent_element.next_element = first_child
if new_parents_last_child is not None:
new_parents_last_child.next_sibling = first_child
# Find the very last element being moved. It is now the
# parent's last descendant. It has no .next_sibling and
# its .next_element is whatever the previous last
# descendant had.
last_childs_last_descendant = to_append[-1]._last_descendant(False, True)
last_childs_last_descendant.next_element = new_parents_last_descendant_next_element
if new_parents_last_descendant_next_element is not None:
# TODO: This code has no test coverage and I'm not sure
# how to get html5lib to go through this path, but it's
# just the other side of the previous line.
new_parents_last_descendant_next_element.previous_element = last_childs_last_descendant
last_childs_last_descendant.next_sibling = None
for child in to_append:
child.parent = new_parent_element
new_parent_element.contents.append(child)
# Now that this element has no children, change its .next_element.
element.contents = []
element.next_element = final_next_element
# print("DONE WITH MOVE")
# print("FROM", self.element)
# print("TO", new_parent_element)
def cloneNode(self):
tag = self.soup.new_tag(self.element.name, self.namespace)
node = Element(tag, self.soup, self.namespace)
for key,value in self.attributes:
node.attributes[key] = value
return node
def hasContent(self):
return self.element.contents
def getNameTuple(self):
if self.namespace == None:
return namespaces["html"], self.name
else:
return self.namespace, self.name
nameTuple = property(getNameTuple)
class TextNode(Element):
def __init__(self, element, soup):
treebuilder_base.Node.__init__(self, None)
self.element = element
self.soup = soup
def cloneNode(self):
raise NotImplementedError

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# encoding: utf-8
"""Use the HTMLParser library to parse HTML files that aren't too bad."""
# Use of this source code is governed by the MIT license.
__license__ = "MIT"
__all__ = [
'HTMLParserTreeBuilder',
]
from html.parser import HTMLParser
import sys
import warnings
from bs4.element import (
CData,
Comment,
Declaration,
Doctype,
ProcessingInstruction,
)
from bs4.dammit import EntitySubstitution, UnicodeDammit
from bs4.builder import (
DetectsXMLParsedAsHTML,
ParserRejectedMarkup,
HTML,
HTMLTreeBuilder,
STRICT,
)
HTMLPARSER = 'html.parser'
class BeautifulSoupHTMLParser(HTMLParser, DetectsXMLParsedAsHTML):
"""A subclass of the Python standard library's HTMLParser class, which
listens for HTMLParser events and translates them into calls
to Beautiful Soup's tree construction API.
"""
# Strategies for handling duplicate attributes
IGNORE = 'ignore'
REPLACE = 'replace'
def __init__(self, *args, **kwargs):
"""Constructor.
:param on_duplicate_attribute: A strategy for what to do if a
tag includes the same attribute more than once. Accepted
values are: REPLACE (replace earlier values with later
ones, the default), IGNORE (keep the earliest value
encountered), or a callable. A callable must take three
arguments: the dictionary of attributes already processed,
the name of the duplicate attribute, and the most recent value
encountered.
"""
self.on_duplicate_attribute = kwargs.pop(
'on_duplicate_attribute', self.REPLACE
)
HTMLParser.__init__(self, *args, **kwargs)
# Keep a list of empty-element tags that were encountered
# without an explicit closing tag. If we encounter a closing tag
# of this type, we'll associate it with one of those entries.
#
# This isn't a stack because we don't care about the
# order. It's a list of closing tags we've already handled and
# will ignore, assuming they ever show up.
self.already_closed_empty_element = []
self._initialize_xml_detector()
def error(self, message):
# NOTE: This method is required so long as Python 3.9 is
# supported. The corresponding code is removed from HTMLParser
# in 3.5, but not removed from ParserBase until 3.10.
# https://github.com/python/cpython/issues/76025
#
# The original implementation turned the error into a warning,
# but in every case I discovered, this made HTMLParser
# immediately crash with an error message that was less
# helpful than the warning. The new implementation makes it
# more clear that html.parser just can't parse this
# markup. The 3.10 implementation does the same, though it
# raises AssertionError rather than calling a method. (We
# catch this error and wrap it in a ParserRejectedMarkup.)
raise ParserRejectedMarkup(message)
def handle_startendtag(self, name, attrs):
"""Handle an incoming empty-element tag.
This is only called when the markup looks like <tag/>.
:param name: Name of the tag.
:param attrs: Dictionary of the tag's attributes.
"""
# is_startend() tells handle_starttag not to close the tag
# just because its name matches a known empty-element tag. We
# know that this is an empty-element tag and we want to call
# handle_endtag ourselves.
tag = self.handle_starttag(name, attrs, handle_empty_element=False)
self.handle_endtag(name)
def handle_starttag(self, name, attrs, handle_empty_element=True):
"""Handle an opening tag, e.g. '<tag>'
:param name: Name of the tag.
:param attrs: Dictionary of the tag's attributes.
:param handle_empty_element: True if this tag is known to be
an empty-element tag (i.e. there is not expected to be any
closing tag).
"""
# XXX namespace
attr_dict = {}
for key, value in attrs:
# Change None attribute values to the empty string
# for consistency with the other tree builders.
if value is None:
value = ''
if key in attr_dict:
# A single attribute shows up multiple times in this
# tag. How to handle it depends on the
# on_duplicate_attribute setting.
on_dupe = self.on_duplicate_attribute
if on_dupe == self.IGNORE:
pass
elif on_dupe in (None, self.REPLACE):
attr_dict[key] = value
else:
on_dupe(attr_dict, key, value)
else:
attr_dict[key] = value
attrvalue = '""'
#print("START", name)
sourceline, sourcepos = self.getpos()
tag = self.soup.handle_starttag(
name, None, None, attr_dict, sourceline=sourceline,
sourcepos=sourcepos
)
if tag and tag.is_empty_element and handle_empty_element:
# Unlike other parsers, html.parser doesn't send separate end tag
# events for empty-element tags. (It's handled in
# handle_startendtag, but only if the original markup looked like
# <tag/>.)
#
# So we need to call handle_endtag() ourselves. Since we
# know the start event is identical to the end event, we
# don't want handle_endtag() to cross off any previous end
# events for tags of this name.
self.handle_endtag(name, check_already_closed=False)
# But we might encounter an explicit closing tag for this tag
# later on. If so, we want to ignore it.
self.already_closed_empty_element.append(name)
if self._root_tag is None:
self._root_tag_encountered(name)
def handle_endtag(self, name, check_already_closed=True):
"""Handle a closing tag, e.g. '</tag>'
:param name: A tag name.
:param check_already_closed: True if this tag is expected to
be the closing portion of an empty-element tag,
e.g. '<tag></tag>'.
"""
#print("END", name)
if check_already_closed and name in self.already_closed_empty_element:
# This is a redundant end tag for an empty-element tag.
# We've already called handle_endtag() for it, so just
# check it off the list.
#print("ALREADY CLOSED", name)
self.already_closed_empty_element.remove(name)
else:
self.soup.handle_endtag(name)
def handle_data(self, data):
"""Handle some textual data that shows up between tags."""
self.soup.handle_data(data)
def handle_charref(self, name):
"""Handle a numeric character reference by converting it to the
corresponding Unicode character and treating it as textual
data.
:param name: Character number, possibly in hexadecimal.
"""
# TODO: This was originally a workaround for a bug in
# HTMLParser. (http://bugs.python.org/issue13633) The bug has
# been fixed, but removing this code still makes some
# Beautiful Soup tests fail. This needs investigation.
if name.startswith('x'):
real_name = int(name.lstrip('x'), 16)
elif name.startswith('X'):
real_name = int(name.lstrip('X'), 16)
else:
real_name = int(name)
data = None
if real_name < 256:
# HTML numeric entities are supposed to reference Unicode
# code points, but sometimes they reference code points in
# some other encoding (ahem, Windows-1252). E.g. &#147;
# instead of &#201; for LEFT DOUBLE QUOTATION MARK. This
# code tries to detect this situation and compensate.
for encoding in (self.soup.original_encoding, 'windows-1252'):
if not encoding:
continue
try:
data = bytearray([real_name]).decode(encoding)
except UnicodeDecodeError as e:
pass
if not data:
try:
data = chr(real_name)
except (ValueError, OverflowError) as e:
pass
data = data or "\N{REPLACEMENT CHARACTER}"
self.handle_data(data)
def handle_entityref(self, name):
"""Handle a named entity reference by converting it to the
corresponding Unicode character(s) and treating it as textual
data.
:param name: Name of the entity reference.
"""
character = EntitySubstitution.HTML_ENTITY_TO_CHARACTER.get(name)
if character is not None:
data = character
else:
# If this were XML, it would be ambiguous whether "&foo"
# was an character entity reference with a missing
# semicolon or the literal string "&foo". Since this is
# HTML, we have a complete list of all character entity references,
# and this one wasn't found, so assume it's the literal string "&foo".
data = "&%s" % name
self.handle_data(data)
def handle_comment(self, data):
"""Handle an HTML comment.
:param data: The text of the comment.
"""
self.soup.endData()
self.soup.handle_data(data)
self.soup.endData(Comment)
def handle_decl(self, data):
"""Handle a DOCTYPE declaration.
:param data: The text of the declaration.
"""
self.soup.endData()
data = data[len("DOCTYPE "):]
self.soup.handle_data(data)
self.soup.endData(Doctype)
def unknown_decl(self, data):
"""Handle a declaration of unknown type -- probably a CDATA block.
:param data: The text of the declaration.
"""
if data.upper().startswith('CDATA['):
cls = CData
data = data[len('CDATA['):]
else:
cls = Declaration
self.soup.endData()
self.soup.handle_data(data)
self.soup.endData(cls)
def handle_pi(self, data):
"""Handle a processing instruction.
:param data: The text of the instruction.
"""
self.soup.endData()
self.soup.handle_data(data)
self._document_might_be_xml(data)
self.soup.endData(ProcessingInstruction)
class HTMLParserTreeBuilder(HTMLTreeBuilder):
"""A Beautiful soup `TreeBuilder` that uses the `HTMLParser` parser,
found in the Python standard library.
"""
is_xml = False
picklable = True
NAME = HTMLPARSER
features = [NAME, HTML, STRICT]
# The html.parser knows which line number and position in the
# original file is the source of an element.
TRACKS_LINE_NUMBERS = True
def __init__(self, parser_args=None, parser_kwargs=None, **kwargs):
"""Constructor.
:param parser_args: Positional arguments to pass into
the BeautifulSoupHTMLParser constructor, once it's
invoked.
:param parser_kwargs: Keyword arguments to pass into
the BeautifulSoupHTMLParser constructor, once it's
invoked.
:param kwargs: Keyword arguments for the superclass constructor.
"""
# Some keyword arguments will be pulled out of kwargs and placed
# into parser_kwargs.
extra_parser_kwargs = dict()
for arg in ('on_duplicate_attribute',):
if arg in kwargs:
value = kwargs.pop(arg)
extra_parser_kwargs[arg] = value
super(HTMLParserTreeBuilder, self).__init__(**kwargs)
parser_args = parser_args or []
parser_kwargs = parser_kwargs or {}
parser_kwargs.update(extra_parser_kwargs)
parser_kwargs['convert_charrefs'] = False
self.parser_args = (parser_args, parser_kwargs)
def prepare_markup(self, markup, user_specified_encoding=None,
document_declared_encoding=None, exclude_encodings=None):
"""Run any preliminary steps necessary to make incoming markup
acceptable to the parser.
:param markup: Some markup -- probably a bytestring.
:param user_specified_encoding: The user asked to try this encoding.
:param document_declared_encoding: The markup itself claims to be
in this encoding.
:param exclude_encodings: The user asked _not_ to try any of
these encodings.
:yield: A series of 4-tuples:
(markup, encoding, declared encoding,
has undergone character replacement)
Each 4-tuple represents a strategy for converting the
document to Unicode and parsing it. Each strategy will be tried
in turn.
"""
if isinstance(markup, str):
# Parse Unicode as-is.
yield (markup, None, None, False)
return
# Ask UnicodeDammit to sniff the most likely encoding.
# This was provided by the end-user; treat it as a known
# definite encoding per the algorithm laid out in the HTML5
# spec. (See the EncodingDetector class for details.)
known_definite_encodings = [user_specified_encoding]
# This was found in the document; treat it as a slightly lower-priority
# user encoding.
user_encodings = [document_declared_encoding]
try_encodings = [user_specified_encoding, document_declared_encoding]
dammit = UnicodeDammit(
markup,
known_definite_encodings=known_definite_encodings,
user_encodings=user_encodings,
is_html=True,
exclude_encodings=exclude_encodings
)
yield (dammit.markup, dammit.original_encoding,
dammit.declared_html_encoding,
dammit.contains_replacement_characters)
def feed(self, markup):
"""Run some incoming markup through some parsing process,
populating the `BeautifulSoup` object in self.soup.
"""
args, kwargs = self.parser_args
parser = BeautifulSoupHTMLParser(*args, **kwargs)
parser.soup = self.soup
try:
parser.feed(markup)
parser.close()
except AssertionError as e:
# html.parser raises AssertionError in rare cases to
# indicate a fatal problem with the markup, especially
# when there's an error in the doctype declaration.
raise ParserRejectedMarkup(e)
parser.already_closed_empty_element = []

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# Use of this source code is governed by the MIT license.
__license__ = "MIT"
__all__ = [
'LXMLTreeBuilderForXML',
'LXMLTreeBuilder',
]
try:
from collections.abc import Callable # Python 3.6
except ImportError as e:
from collections import Callable
from io import BytesIO
from io import StringIO
from lxml import etree
from bs4.element import (
Comment,
Doctype,
NamespacedAttribute,
ProcessingInstruction,
XMLProcessingInstruction,
)
from bs4.builder import (
DetectsXMLParsedAsHTML,
FAST,
HTML,
HTMLTreeBuilder,
PERMISSIVE,
ParserRejectedMarkup,
TreeBuilder,
XML)
from bs4.dammit import EncodingDetector
LXML = 'lxml'
def _invert(d):
"Invert a dictionary."
return dict((v,k) for k, v in list(d.items()))
class LXMLTreeBuilderForXML(TreeBuilder):
DEFAULT_PARSER_CLASS = etree.XMLParser
is_xml = True
processing_instruction_class = XMLProcessingInstruction
NAME = "lxml-xml"
ALTERNATE_NAMES = ["xml"]
# Well, it's permissive by XML parser standards.
features = [NAME, LXML, XML, FAST, PERMISSIVE]
CHUNK_SIZE = 512
# This namespace mapping is specified in the XML Namespace
# standard.
DEFAULT_NSMAPS = dict(xml='http://www.w3.org/XML/1998/namespace')
DEFAULT_NSMAPS_INVERTED = _invert(DEFAULT_NSMAPS)
# NOTE: If we parsed Element objects and looked at .sourceline,
# we'd be able to see the line numbers from the original document.
# But instead we build an XMLParser or HTMLParser object to serve
# as the target of parse messages, and those messages don't include
# line numbers.
# See: https://bugs.launchpad.net/lxml/+bug/1846906
def initialize_soup(self, soup):
"""Let the BeautifulSoup object know about the standard namespace
mapping.
:param soup: A `BeautifulSoup`.
"""
super(LXMLTreeBuilderForXML, self).initialize_soup(soup)
self._register_namespaces(self.DEFAULT_NSMAPS)
def _register_namespaces(self, mapping):
"""Let the BeautifulSoup object know about namespaces encountered
while parsing the document.
This might be useful later on when creating CSS selectors.
This will track (almost) all namespaces, even ones that were
only in scope for part of the document. If two namespaces have
the same prefix, only the first one encountered will be
tracked. Un-prefixed namespaces are not tracked.
:param mapping: A dictionary mapping namespace prefixes to URIs.
"""
for key, value in list(mapping.items()):
# This is 'if key' and not 'if key is not None' because we
# don't track un-prefixed namespaces. Soupselect will
# treat an un-prefixed namespace as the default, which
# causes confusion in some cases.
if key and key not in self.soup._namespaces:
# Let the BeautifulSoup object know about a new namespace.
# If there are multiple namespaces defined with the same
# prefix, the first one in the document takes precedence.
self.soup._namespaces[key] = value
def default_parser(self, encoding):
"""Find the default parser for the given encoding.
:param encoding: A string.
:return: Either a parser object or a class, which
will be instantiated with default arguments.
"""
if self._default_parser is not None:
return self._default_parser
return etree.XMLParser(
target=self, strip_cdata=False, recover=True, encoding=encoding)
def parser_for(self, encoding):
"""Instantiate an appropriate parser for the given encoding.
:param encoding: A string.
:return: A parser object such as an `etree.XMLParser`.
"""
# Use the default parser.
parser = self.default_parser(encoding)
if isinstance(parser, Callable):
# Instantiate the parser with default arguments
parser = parser(
target=self, strip_cdata=False, recover=True, encoding=encoding
)
return parser
def __init__(self, parser=None, empty_element_tags=None, **kwargs):
# TODO: Issue a warning if parser is present but not a
# callable, since that means there's no way to create new
# parsers for different encodings.
self._default_parser = parser
if empty_element_tags is not None:
self.empty_element_tags = set(empty_element_tags)
self.soup = None
self.nsmaps = [self.DEFAULT_NSMAPS_INVERTED]
self.active_namespace_prefixes = [dict(self.DEFAULT_NSMAPS)]
super(LXMLTreeBuilderForXML, self).__init__(**kwargs)
def _getNsTag(self, tag):
# Split the namespace URL out of a fully-qualified lxml tag
# name. Copied from lxml's src/lxml/sax.py.
if tag[0] == '{':
return tuple(tag[1:].split('}', 1))
else:
return (None, tag)
def prepare_markup(self, markup, user_specified_encoding=None,
exclude_encodings=None,
document_declared_encoding=None):
"""Run any preliminary steps necessary to make incoming markup
acceptable to the parser.
lxml really wants to get a bytestring and convert it to
Unicode itself. So instead of using UnicodeDammit to convert
the bytestring to Unicode using different encodings, this
implementation uses EncodingDetector to iterate over the
encodings, and tell lxml to try to parse the document as each
one in turn.
:param markup: Some markup -- hopefully a bytestring.
:param user_specified_encoding: The user asked to try this encoding.
:param document_declared_encoding: The markup itself claims to be
in this encoding.
:param exclude_encodings: The user asked _not_ to try any of
these encodings.
:yield: A series of 4-tuples:
(markup, encoding, declared encoding,
has undergone character replacement)
Each 4-tuple represents a strategy for converting the
document to Unicode and parsing it. Each strategy will be tried
in turn.
"""
is_html = not self.is_xml
if is_html:
self.processing_instruction_class = ProcessingInstruction
# We're in HTML mode, so if we're given XML, that's worth
# noting.
DetectsXMLParsedAsHTML.warn_if_markup_looks_like_xml(
markup, stacklevel=3
)
else:
self.processing_instruction_class = XMLProcessingInstruction
if isinstance(markup, str):
# We were given Unicode. Maybe lxml can parse Unicode on
# this system?
# TODO: This is a workaround for
# https://bugs.launchpad.net/lxml/+bug/1948551.
# We can remove it once the upstream issue is fixed.
if len(markup) > 0 and markup[0] == u'\N{BYTE ORDER MARK}':
markup = markup[1:]
yield markup, None, document_declared_encoding, False
if isinstance(markup, str):
# No, apparently not. Convert the Unicode to UTF-8 and
# tell lxml to parse it as UTF-8.
yield (markup.encode("utf8"), "utf8",
document_declared_encoding, False)
# This was provided by the end-user; treat it as a known
# definite encoding per the algorithm laid out in the HTML5
# spec. (See the EncodingDetector class for details.)
known_definite_encodings = [user_specified_encoding]
# This was found in the document; treat it as a slightly lower-priority
# user encoding.
user_encodings = [document_declared_encoding]
detector = EncodingDetector(
markup, known_definite_encodings=known_definite_encodings,
user_encodings=user_encodings, is_html=is_html,
exclude_encodings=exclude_encodings
)
for encoding in detector.encodings:
yield (detector.markup, encoding, document_declared_encoding, False)
def feed(self, markup):
if isinstance(markup, bytes):
markup = BytesIO(markup)
elif isinstance(markup, str):
markup = StringIO(markup)
# Call feed() at least once, even if the markup is empty,
# or the parser won't be initialized.
data = markup.read(self.CHUNK_SIZE)
try:
self.parser = self.parser_for(self.soup.original_encoding)
self.parser.feed(data)
while len(data) != 0:
# Now call feed() on the rest of the data, chunk by chunk.
data = markup.read(self.CHUNK_SIZE)
if len(data) != 0:
self.parser.feed(data)
self.parser.close()
except (UnicodeDecodeError, LookupError, etree.ParserError) as e:
raise ParserRejectedMarkup(e)
def close(self):
self.nsmaps = [self.DEFAULT_NSMAPS_INVERTED]
def start(self, name, attrs, nsmap={}):
# Make sure attrs is a mutable dict--lxml may send an immutable dictproxy.
attrs = dict(attrs)
nsprefix = None
# Invert each namespace map as it comes in.
if len(nsmap) == 0 and len(self.nsmaps) > 1:
# There are no new namespaces for this tag, but
# non-default namespaces are in play, so we need a
# separate tag stack to know when they end.
self.nsmaps.append(None)
elif len(nsmap) > 0:
# A new namespace mapping has come into play.
# First, Let the BeautifulSoup object know about it.
self._register_namespaces(nsmap)
# Then, add it to our running list of inverted namespace
# mappings.
self.nsmaps.append(_invert(nsmap))
# The currently active namespace prefixes have
# changed. Calculate the new mapping so it can be stored
# with all Tag objects created while these prefixes are in
# scope.
current_mapping = dict(self.active_namespace_prefixes[-1])
current_mapping.update(nsmap)
# We should not track un-prefixed namespaces as we can only hold one
# and it will be recognized as the default namespace by soupsieve,
# which may be confusing in some situations.
if '' in current_mapping:
del current_mapping['']
self.active_namespace_prefixes.append(current_mapping)
# Also treat the namespace mapping as a set of attributes on the
# tag, so we can recreate it later.
attrs = attrs.copy()
for prefix, namespace in list(nsmap.items()):
attribute = NamespacedAttribute(
"xmlns", prefix, "http://www.w3.org/2000/xmlns/")
attrs[attribute] = namespace
# Namespaces are in play. Find any attributes that came in
# from lxml with namespaces attached to their names, and
# turn then into NamespacedAttribute objects.
new_attrs = {}
for attr, value in list(attrs.items()):
namespace, attr = self._getNsTag(attr)
if namespace is None:
new_attrs[attr] = value
else:
nsprefix = self._prefix_for_namespace(namespace)
attr = NamespacedAttribute(nsprefix, attr, namespace)
new_attrs[attr] = value
attrs = new_attrs
namespace, name = self._getNsTag(name)
nsprefix = self._prefix_for_namespace(namespace)
self.soup.handle_starttag(
name, namespace, nsprefix, attrs,
namespaces=self.active_namespace_prefixes[-1]
)
def _prefix_for_namespace(self, namespace):
"""Find the currently active prefix for the given namespace."""
if namespace is None:
return None
for inverted_nsmap in reversed(self.nsmaps):
if inverted_nsmap is not None and namespace in inverted_nsmap:
return inverted_nsmap[namespace]
return None
def end(self, name):
self.soup.endData()
completed_tag = self.soup.tagStack[-1]
namespace, name = self._getNsTag(name)
nsprefix = None
if namespace is not None:
for inverted_nsmap in reversed(self.nsmaps):
if inverted_nsmap is not None and namespace in inverted_nsmap:
nsprefix = inverted_nsmap[namespace]
break
self.soup.handle_endtag(name, nsprefix)
if len(self.nsmaps) > 1:
# This tag, or one of its parents, introduced a namespace
# mapping, so pop it off the stack.
out_of_scope_nsmap = self.nsmaps.pop()
if out_of_scope_nsmap is not None:
# This tag introduced a namespace mapping which is no
# longer in scope. Recalculate the currently active
# namespace prefixes.
self.active_namespace_prefixes.pop()
def pi(self, target, data):
self.soup.endData()
data = target + ' ' + data
self.soup.handle_data(data)
self.soup.endData(self.processing_instruction_class)
def data(self, content):
self.soup.handle_data(content)
def doctype(self, name, pubid, system):
self.soup.endData()
doctype = Doctype.for_name_and_ids(name, pubid, system)
self.soup.object_was_parsed(doctype)
def comment(self, content):
"Handle comments as Comment objects."
self.soup.endData()
self.soup.handle_data(content)
self.soup.endData(Comment)
def test_fragment_to_document(self, fragment):
"""See `TreeBuilder`."""
return '<?xml version="1.0" encoding="utf-8"?>\n%s' % fragment
class LXMLTreeBuilder(HTMLTreeBuilder, LXMLTreeBuilderForXML):
NAME = LXML
ALTERNATE_NAMES = ["lxml-html"]
features = ALTERNATE_NAMES + [NAME, HTML, FAST, PERMISSIVE]
is_xml = False
processing_instruction_class = ProcessingInstruction
def default_parser(self, encoding):
return etree.HTMLParser
def feed(self, markup):
encoding = self.soup.original_encoding
try:
self.parser = self.parser_for(encoding)
self.parser.feed(markup)
self.parser.close()
except (UnicodeDecodeError, LookupError, etree.ParserError) as e:
raise ParserRejectedMarkup(e)
def test_fragment_to_document(self, fragment):
"""See `TreeBuilder`."""
return '<html><body>%s</body></html>' % fragment

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"""Integration code for CSS selectors using Soup Sieve (pypi: soupsieve)."""
import warnings
try:
import soupsieve
except ImportError as e:
soupsieve = None
warnings.warn(
'The soupsieve package is not installed. CSS selectors cannot be used.'
)
class CSS(object):
"""A proxy object against the soupsieve library, to simplify its
CSS selector API.
Acquire this object through the .css attribute on the
BeautifulSoup object, or on the Tag you want to use as the
starting point for a CSS selector.
The main advantage of doing this is that the tag to be selected
against doesn't need to be explicitly specified in the function
calls, since it's already scoped to a tag.
"""
def __init__(self, tag, api=soupsieve):
"""Constructor.
You don't need to instantiate this class yourself; instead,
access the .css attribute on the BeautifulSoup object, or on
the Tag you want to use as the starting point for your CSS
selector.
:param tag: All CSS selectors will use this as their starting
point.
:param api: A plug-in replacement for the soupsieve module,
designed mainly for use in tests.
"""
if api is None:
raise NotImplementedError(
"Cannot execute CSS selectors because the soupsieve package is not installed."
)
self.api = api
self.tag = tag
def escape(self, ident):
"""Escape a CSS identifier.
This is a simple wrapper around soupselect.escape(). See the
documentation for that function for more information.
"""
if soupsieve is None:
raise NotImplementedError(
"Cannot escape CSS identifiers because the soupsieve package is not installed."
)
return self.api.escape(ident)
def _ns(self, ns, select):
"""Normalize a dictionary of namespaces."""
if not isinstance(select, self.api.SoupSieve) and ns is None:
# If the selector is a precompiled pattern, it already has
# a namespace context compiled in, which cannot be
# replaced.
ns = self.tag._namespaces
return ns
def _rs(self, results):
"""Normalize a list of results to a Resultset.
A ResultSet is more consistent with the rest of Beautiful
Soup's API, and ResultSet.__getattr__ has a helpful error
message if you try to treat a list of results as a single
result (a common mistake).
"""
# Import here to avoid circular import
from bs4.element import ResultSet
return ResultSet(None, results)
def compile(self, select, namespaces=None, flags=0, **kwargs):
"""Pre-compile a selector and return the compiled object.
:param selector: A CSS selector.
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will use the prefixes it encountered while
parsing the document.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.compile() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.compile() method.
:return: A precompiled selector object.
:rtype: soupsieve.SoupSieve
"""
return self.api.compile(
select, self._ns(namespaces, select), flags, **kwargs
)
def select_one(self, select, namespaces=None, flags=0, **kwargs):
"""Perform a CSS selection operation on the current Tag and return the
first result.
This uses the Soup Sieve library. For more information, see
that library's documentation for the soupsieve.select_one()
method.
:param selector: A CSS selector.
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will use the prefixes it encountered while
parsing the document.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.select_one() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.select_one() method.
:return: A Tag, or None if the selector has no match.
:rtype: bs4.element.Tag
"""
return self.api.select_one(
select, self.tag, self._ns(namespaces, select), flags, **kwargs
)
def select(self, select, namespaces=None, limit=0, flags=0, **kwargs):
"""Perform a CSS selection operation on the current Tag.
This uses the Soup Sieve library. For more information, see
that library's documentation for the soupsieve.select()
method.
:param selector: A string containing a CSS selector.
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will pass in the prefixes it encountered while
parsing the document.
:param limit: After finding this number of results, stop looking.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.select() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.select() method.
:return: A ResultSet of Tag objects.
:rtype: bs4.element.ResultSet
"""
if limit is None:
limit = 0
return self._rs(
self.api.select(
select, self.tag, self._ns(namespaces, select), limit, flags,
**kwargs
)
)
def iselect(self, select, namespaces=None, limit=0, flags=0, **kwargs):
"""Perform a CSS selection operation on the current Tag.
This uses the Soup Sieve library. For more information, see
that library's documentation for the soupsieve.iselect()
method. It is the same as select(), but it returns a generator
instead of a list.
:param selector: A string containing a CSS selector.
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will pass in the prefixes it encountered while
parsing the document.
:param limit: After finding this number of results, stop looking.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.iselect() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.iselect() method.
:return: A generator
:rtype: types.GeneratorType
"""
return self.api.iselect(
select, self.tag, self._ns(namespaces, select), limit, flags, **kwargs
)
def closest(self, select, namespaces=None, flags=0, **kwargs):
"""Find the Tag closest to this one that matches the given selector.
This uses the Soup Sieve library. For more information, see
that library's documentation for the soupsieve.closest()
method.
:param selector: A string containing a CSS selector.
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will pass in the prefixes it encountered while
parsing the document.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.closest() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.closest() method.
:return: A Tag, or None if there is no match.
:rtype: bs4.Tag
"""
return self.api.closest(
select, self.tag, self._ns(namespaces, select), flags, **kwargs
)
def match(self, select, namespaces=None, flags=0, **kwargs):
"""Check whether this Tag matches the given CSS selector.
This uses the Soup Sieve library. For more information, see
that library's documentation for the soupsieve.match()
method.
:param: a CSS selector.
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will pass in the prefixes it encountered while
parsing the document.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.match() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.match() method.
:return: True if this Tag matches the selector; False otherwise.
:rtype: bool
"""
return self.api.match(
select, self.tag, self._ns(namespaces, select), flags, **kwargs
)
def filter(self, select, namespaces=None, flags=0, **kwargs):
"""Filter this Tag's direct children based on the given CSS selector.
This uses the Soup Sieve library. It works the same way as
passing this Tag into that library's soupsieve.filter()
method. More information, for more information see the
documentation for soupsieve.filter().
:param namespaces: A dictionary mapping namespace prefixes
used in the CSS selector to namespace URIs. By default,
Beautiful Soup will pass in the prefixes it encountered while
parsing the document.
:param flags: Flags to be passed into Soup Sieve's
soupsieve.filter() method.
:param kwargs: Keyword arguments to be passed into SoupSieve's
soupsieve.filter() method.
:return: A ResultSet of Tag objects.
:rtype: bs4.element.ResultSet
"""
return self._rs(
self.api.filter(
select, self.tag, self._ns(namespaces, select), flags, **kwargs
)
)

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"""Diagnostic functions, mainly for use when doing tech support."""
# Use of this source code is governed by the MIT license.
__license__ = "MIT"
import cProfile
from io import BytesIO
from html.parser import HTMLParser
import bs4
from bs4 import BeautifulSoup, __version__
from bs4.builder import builder_registry
import os
import pstats
import random
import tempfile
import time
import traceback
import sys
import cProfile
def diagnose(data):
"""Diagnostic suite for isolating common problems.
:param data: A string containing markup that needs to be explained.
:return: None; diagnostics are printed to standard output.
"""
print(("Diagnostic running on Beautiful Soup %s" % __version__))
print(("Python version %s" % sys.version))
basic_parsers = ["html.parser", "html5lib", "lxml"]
for name in basic_parsers:
for builder in builder_registry.builders:
if name in builder.features:
break
else:
basic_parsers.remove(name)
print((
"I noticed that %s is not installed. Installing it may help." %
name))
if 'lxml' in basic_parsers:
basic_parsers.append("lxml-xml")
try:
from lxml import etree
print(("Found lxml version %s" % ".".join(map(str,etree.LXML_VERSION))))
except ImportError as e:
print(
"lxml is not installed or couldn't be imported.")
if 'html5lib' in basic_parsers:
try:
import html5lib
print(("Found html5lib version %s" % html5lib.__version__))
except ImportError as e:
print(
"html5lib is not installed or couldn't be imported.")
if hasattr(data, 'read'):
data = data.read()
for parser in basic_parsers:
print(("Trying to parse your markup with %s" % parser))
success = False
try:
soup = BeautifulSoup(data, features=parser)
success = True
except Exception as e:
print(("%s could not parse the markup." % parser))
traceback.print_exc()
if success:
print(("Here's what %s did with the markup:" % parser))
print((soup.prettify()))
print(("-" * 80))
def lxml_trace(data, html=True, **kwargs):
"""Print out the lxml events that occur during parsing.
This lets you see how lxml parses a document when no Beautiful
Soup code is running. You can use this to determine whether
an lxml-specific problem is in Beautiful Soup's lxml tree builders
or in lxml itself.
:param data: Some markup.
:param html: If True, markup will be parsed with lxml's HTML parser.
if False, lxml's XML parser will be used.
"""
from lxml import etree
recover = kwargs.pop('recover', True)
if isinstance(data, str):
data = data.encode("utf8")
reader = BytesIO(data)
for event, element in etree.iterparse(
reader, html=html, recover=recover, **kwargs
):
print(("%s, %4s, %s" % (event, element.tag, element.text)))
class AnnouncingParser(HTMLParser):
"""Subclass of HTMLParser that announces parse events, without doing
anything else.
You can use this to get a picture of how html.parser sees a given
document. The easiest way to do this is to call `htmlparser_trace`.
"""
def _p(self, s):
print(s)
def handle_starttag(self, name, attrs):
self._p("%s START" % name)
def handle_endtag(self, name):
self._p("%s END" % name)
def handle_data(self, data):
self._p("%s DATA" % data)
def handle_charref(self, name):
self._p("%s CHARREF" % name)
def handle_entityref(self, name):
self._p("%s ENTITYREF" % name)
def handle_comment(self, data):
self._p("%s COMMENT" % data)
def handle_decl(self, data):
self._p("%s DECL" % data)
def unknown_decl(self, data):
self._p("%s UNKNOWN-DECL" % data)
def handle_pi(self, data):
self._p("%s PI" % data)
def htmlparser_trace(data):
"""Print out the HTMLParser events that occur during parsing.
This lets you see how HTMLParser parses a document when no
Beautiful Soup code is running.
:param data: Some markup.
"""
parser = AnnouncingParser()
parser.feed(data)
_vowels = "aeiou"
_consonants = "bcdfghjklmnpqrstvwxyz"
def rword(length=5):
"Generate a random word-like string."
s = ''
for i in range(length):
if i % 2 == 0:
t = _consonants
else:
t = _vowels
s += random.choice(t)
return s
def rsentence(length=4):
"Generate a random sentence-like string."
return " ".join(rword(random.randint(4,9)) for i in range(length))
def rdoc(num_elements=1000):
"""Randomly generate an invalid HTML document."""
tag_names = ['p', 'div', 'span', 'i', 'b', 'script', 'table']
elements = []
for i in range(num_elements):
choice = random.randint(0,3)
if choice == 0:
# New tag.
tag_name = random.choice(tag_names)
elements.append("<%s>" % tag_name)
elif choice == 1:
elements.append(rsentence(random.randint(1,4)))
elif choice == 2:
# Close a tag.
tag_name = random.choice(tag_names)
elements.append("</%s>" % tag_name)
return "<html>" + "\n".join(elements) + "</html>"
def benchmark_parsers(num_elements=100000):
"""Very basic head-to-head performance benchmark."""
print(("Comparative parser benchmark on Beautiful Soup %s" % __version__))
data = rdoc(num_elements)
print(("Generated a large invalid HTML document (%d bytes)." % len(data)))
for parser in ["lxml", ["lxml", "html"], "html5lib", "html.parser"]:
success = False
try:
a = time.time()
soup = BeautifulSoup(data, parser)
b = time.time()
success = True
except Exception as e:
print(("%s could not parse the markup." % parser))
traceback.print_exc()
if success:
print(("BS4+%s parsed the markup in %.2fs." % (parser, b-a)))
from lxml import etree
a = time.time()
etree.HTML(data)
b = time.time()
print(("Raw lxml parsed the markup in %.2fs." % (b-a)))
import html5lib
parser = html5lib.HTMLParser()
a = time.time()
parser.parse(data)
b = time.time()
print(("Raw html5lib parsed the markup in %.2fs." % (b-a)))
def profile(num_elements=100000, parser="lxml"):
"""Use Python's profiler on a randomly generated document."""
filehandle = tempfile.NamedTemporaryFile()
filename = filehandle.name
data = rdoc(num_elements)
vars = dict(bs4=bs4, data=data, parser=parser)
cProfile.runctx('bs4.BeautifulSoup(data, parser)' , vars, vars, filename)
stats = pstats.Stats(filename)
# stats.strip_dirs()
stats.sort_stats("cumulative")
stats.print_stats('_html5lib|bs4', 50)
# If this file is run as a script, standard input is diagnosed.
if __name__ == '__main__':
diagnose(sys.stdin.read())

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from bs4.dammit import EntitySubstitution
class Formatter(EntitySubstitution):
"""Describes a strategy to use when outputting a parse tree to a string.
Some parts of this strategy come from the distinction between
HTML4, HTML5, and XML. Others are configurable by the user.
Formatters are passed in as the `formatter` argument to methods
like `PageElement.encode`. Most people won't need to think about
formatters, and most people who need to think about them can pass
in one of these predefined strings as `formatter` rather than
making a new Formatter object:
For HTML documents:
* 'html' - HTML entity substitution for generic HTML documents. (default)
* 'html5' - HTML entity substitution for HTML5 documents, as
well as some optimizations in the way tags are rendered.
* 'minimal' - Only make the substitutions necessary to guarantee
valid HTML.
* None - Do not perform any substitution. This will be faster
but may result in invalid markup.
For XML documents:
* 'html' - Entity substitution for XHTML documents.
* 'minimal' - Only make the substitutions necessary to guarantee
valid XML. (default)
* None - Do not perform any substitution. This will be faster
but may result in invalid markup.
"""
# Registries of XML and HTML formatters.
XML_FORMATTERS = {}
HTML_FORMATTERS = {}
HTML = 'html'
XML = 'xml'
HTML_DEFAULTS = dict(
cdata_containing_tags=set(["script", "style"]),
)
def _default(self, language, value, kwarg):
if value is not None:
return value
if language == self.XML:
return set()
return self.HTML_DEFAULTS[kwarg]
def __init__(
self, language=None, entity_substitution=None,
void_element_close_prefix='/', cdata_containing_tags=None,
empty_attributes_are_booleans=False, indent=1,
):
r"""Constructor.
:param language: This should be Formatter.XML if you are formatting
XML markup and Formatter.HTML if you are formatting HTML markup.
:param entity_substitution: A function to call to replace special
characters with XML/HTML entities. For examples, see
bs4.dammit.EntitySubstitution.substitute_html and substitute_xml.
:param void_element_close_prefix: By default, void elements
are represented as <tag/> (XML rules) rather than <tag>
(HTML rules). To get <tag>, pass in the empty string.
:param cdata_containing_tags: The list of tags that are defined
as containing CDATA in this dialect. For example, in HTML,
<script> and <style> tags are defined as containing CDATA,
and their contents should not be formatted.
:param blank_attributes_are_booleans: Render attributes whose value
is the empty string as HTML-style boolean attributes.
(Attributes whose value is None are always rendered this way.)
:param indent: If indent is a non-negative integer or string,
then the contents of elements will be indented
appropriately when pretty-printing. An indent level of 0,
negative, or "" will only insert newlines. Using a
positive integer indent indents that many spaces per
level. If indent is a string (such as "\t"), that string
is used to indent each level. The default behavior is to
indent one space per level.
"""
self.language = language
self.entity_substitution = entity_substitution
self.void_element_close_prefix = void_element_close_prefix
self.cdata_containing_tags = self._default(
language, cdata_containing_tags, 'cdata_containing_tags'
)
self.empty_attributes_are_booleans=empty_attributes_are_booleans
if indent is None:
indent = 0
if isinstance(indent, int):
if indent < 0:
indent = 0
indent = ' ' * indent
elif isinstance(indent, str):
indent = indent
else:
indent = ' '
self.indent = indent
def substitute(self, ns):
"""Process a string that needs to undergo entity substitution.
This may be a string encountered in an attribute value or as
text.
:param ns: A string.
:return: A string with certain characters replaced by named
or numeric entities.
"""
if not self.entity_substitution:
return ns
from .element import NavigableString
if (isinstance(ns, NavigableString)
and ns.parent is not None
and ns.parent.name in self.cdata_containing_tags):
# Do nothing.
return ns
# Substitute.
return self.entity_substitution(ns)
def attribute_value(self, value):
"""Process the value of an attribute.
:param ns: A string.
:return: A string with certain characters replaced by named
or numeric entities.
"""
return self.substitute(value)
def attributes(self, tag):
"""Reorder a tag's attributes however you want.
By default, attributes are sorted alphabetically. This makes
behavior consistent between Python 2 and Python 3, and preserves
backwards compatibility with older versions of Beautiful Soup.
If `empty_boolean_attributes` is True, then attributes whose
values are set to the empty string will be treated as boolean
attributes.
"""
if tag.attrs is None:
return []
return sorted(
(k, (None if self.empty_attributes_are_booleans and v == '' else v))
for k, v in list(tag.attrs.items())
)
class HTMLFormatter(Formatter):
"""A generic Formatter for HTML."""
REGISTRY = {}
def __init__(self, *args, **kwargs):
super(HTMLFormatter, self).__init__(self.HTML, *args, **kwargs)
class XMLFormatter(Formatter):
"""A generic Formatter for XML."""
REGISTRY = {}
def __init__(self, *args, **kwargs):
super(XMLFormatter, self).__init__(self.XML, *args, **kwargs)
# Set up aliases for the default formatters.
HTMLFormatter.REGISTRY['html'] = HTMLFormatter(
entity_substitution=EntitySubstitution.substitute_html
)
HTMLFormatter.REGISTRY["html5"] = HTMLFormatter(
entity_substitution=EntitySubstitution.substitute_html,
void_element_close_prefix=None,
empty_attributes_are_booleans=True,
)
HTMLFormatter.REGISTRY["minimal"] = HTMLFormatter(
entity_substitution=EntitySubstitution.substitute_xml
)
HTMLFormatter.REGISTRY[None] = HTMLFormatter(
entity_substitution=None
)
XMLFormatter.REGISTRY["html"] = XMLFormatter(
entity_substitution=EntitySubstitution.substitute_html
)
XMLFormatter.REGISTRY["minimal"] = XMLFormatter(
entity_substitution=EntitySubstitution.substitute_xml
)
XMLFormatter.REGISTRY[None] = Formatter(
Formatter(Formatter.XML, entity_substitution=None)
)

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.venv/Lib/site-packages/bs4/tests/test_builder.py
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import pytest
from unittest.mock import patch
from bs4.builder import DetectsXMLParsedAsHTML
class TestDetectsXMLParsedAsHTML(object):
@pytest.mark.parametrize(
"markup,looks_like_xml",
[("No xml declaration", False),
("<html>obviously HTML</html", False),
("<?xml ><html>Actually XHTML</html>", False),
("<?xml> < html>Tricky XHTML</html>", False),
("<?xml ><no-html-tag>", True),
]
)
def test_warn_if_markup_looks_like_xml(self, markup, looks_like_xml):
# Test of our ability to guess at whether markup looks XML-ish
# _and_ not HTML-ish.
with patch('bs4.builder.DetectsXMLParsedAsHTML._warn') as mock:
for data in markup, markup.encode('utf8'):
result = DetectsXMLParsedAsHTML.warn_if_markup_looks_like_xml(
data
)
assert result == looks_like_xml
if looks_like_xml:
assert mock.called
else:
assert not mock.called
mock.reset_mock()

137
.venv/Lib/site-packages/bs4/tests/test_builder_registry.py
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"""Tests of the builder registry."""
import pytest
import warnings
from bs4 import BeautifulSoup
from bs4.builder import (
builder_registry as registry,
HTMLParserTreeBuilder,
TreeBuilderRegistry,
)
from . import (
HTML5LIB_PRESENT,
LXML_PRESENT,
)
if HTML5LIB_PRESENT:
from bs4.builder import HTML5TreeBuilder
if LXML_PRESENT:
from bs4.builder import (
LXMLTreeBuilderForXML,
LXMLTreeBuilder,
)
# TODO: Split out the lxml and html5lib tests into their own classes
# and gate with pytest.mark.skipIf.
class TestBuiltInRegistry(object):
"""Test the built-in registry with the default builders registered."""
def test_combination(self):
assert registry.lookup('strict', 'html') == HTMLParserTreeBuilder
if LXML_PRESENT:
assert registry.lookup('fast', 'html') == LXMLTreeBuilder
assert registry.lookup('permissive', 'xml') == LXMLTreeBuilderForXML
if HTML5LIB_PRESENT:
assert registry.lookup('html5lib', 'html') == HTML5TreeBuilder
def test_lookup_by_markup_type(self):
if LXML_PRESENT:
assert registry.lookup('html') == LXMLTreeBuilder
assert registry.lookup('xml') == LXMLTreeBuilderForXML
else:
assert registry.lookup('xml') == None
if HTML5LIB_PRESENT:
assert registry.lookup('html') == HTML5TreeBuilder
else:
assert registry.lookup('html') == HTMLParserTreeBuilder
def test_named_library(self):
if LXML_PRESENT:
assert registry.lookup('lxml', 'xml') == LXMLTreeBuilderForXML
assert registry.lookup('lxml', 'html') == LXMLTreeBuilder
if HTML5LIB_PRESENT:
assert registry.lookup('html5lib') == HTML5TreeBuilder
assert registry.lookup('html.parser') == HTMLParserTreeBuilder
def test_beautifulsoup_constructor_does_lookup(self):
with warnings.catch_warnings(record=True) as w:
# This will create a warning about not explicitly
# specifying a parser, but we'll ignore it.
# You can pass in a string.
BeautifulSoup("", features="html")
# Or a list of strings.
BeautifulSoup("", features=["html", "fast"])
pass
# You'll get an exception if BS can't find an appropriate
# builder.
with pytest.raises(ValueError):
BeautifulSoup("", features="no-such-feature")
class TestRegistry(object):
"""Test the TreeBuilderRegistry class in general."""
def setup_method(self):
self.registry = TreeBuilderRegistry()
def builder_for_features(self, *feature_list):
cls = type('Builder_' + '_'.join(feature_list),
(object,), {'features' : feature_list})
self.registry.register(cls)
return cls
def test_register_with_no_features(self):
builder = self.builder_for_features()
# Since the builder advertises no features, you can't find it
# by looking up features.
assert self.registry.lookup('foo') is None
# But you can find it by doing a lookup with no features, if
# this happens to be the only registered builder.
assert self.registry.lookup() == builder
def test_register_with_features_makes_lookup_succeed(self):
builder = self.builder_for_features('foo', 'bar')
assert self.registry.lookup('foo') is builder
assert self.registry.lookup('bar') is builder
def test_lookup_fails_when_no_builder_implements_feature(self):
builder = self.builder_for_features('foo', 'bar')
assert self.registry.lookup('baz') is None
def test_lookup_gets_most_recent_registration_when_no_feature_specified(self):
builder1 = self.builder_for_features('foo')
builder2 = self.builder_for_features('bar')
assert self.registry.lookup() == builder2
def test_lookup_fails_when_no_tree_builders_registered(self):
assert self.registry.lookup() is None
def test_lookup_gets_most_recent_builder_supporting_all_features(self):
has_one = self.builder_for_features('foo')
has_the_other = self.builder_for_features('bar')
has_both_early = self.builder_for_features('foo', 'bar', 'baz')
has_both_late = self.builder_for_features('foo', 'bar', 'quux')
lacks_one = self.builder_for_features('bar')
has_the_other = self.builder_for_features('foo')
# There are two builders featuring 'foo' and 'bar', but
# the one that also features 'quux' was registered later.
assert self.registry.lookup('foo', 'bar') == has_both_late
# There is only one builder featuring 'foo', 'bar', and 'baz'.
assert self.registry.lookup('foo', 'bar', 'baz') == has_both_early
def test_lookup_fails_when_cannot_reconcile_requested_features(self):
builder1 = self.builder_for_features('foo', 'bar')
builder2 = self.builder_for_features('foo', 'baz')
assert self.registry.lookup('bar', 'baz') is None

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.venv/Lib/site-packages/bs4/tests/test_css.py
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import pytest
import types
from unittest.mock import MagicMock
from bs4 import (
CSS,
BeautifulSoup,
ResultSet,
)
from . import (
SoupTest,
SOUP_SIEVE_PRESENT,
)
if SOUP_SIEVE_PRESENT:
from soupsieve import SelectorSyntaxError
@pytest.mark.skipif(not SOUP_SIEVE_PRESENT, reason="Soup Sieve not installed")
class TestCSSSelectors(SoupTest):
"""Test basic CSS selector functionality.
This functionality is implemented in soupsieve, which has a much
more comprehensive test suite, so this is basically an extra check
that soupsieve works as expected.
"""
HTML = """
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>The title</title>
<link rel="stylesheet" href="blah.css" type="text/css" id="l1">
</head>
<body>
<custom-dashed-tag class="dashed" id="dash1">Hello there.</custom-dashed-tag>
<div id="main" class="fancy">
<div id="inner">
<h1 id="header1">An H1</h1>
<p>Some text</p>
<p class="onep" id="p1">Some more text</p>
<h2 id="header2">An H2</h2>
<p class="class1 class2 class3" id="pmulti">Another</p>
<a href="http://bob.example.org/" rel="friend met" id="bob">Bob</a>
<h2 id="header3">Another H2</h2>
<a id="me" href="http://simonwillison.net/" rel="me">me</a>
<span class="s1">
<a href="#" id="s1a1">span1a1</a>
<a href="#" id="s1a2">span1a2 <span id="s1a2s1">test</span></a>
<span class="span2">
<a href="#" id="s2a1">span2a1</a>
</span>
<span class="span3"></span>
<custom-dashed-tag class="dashed" id="dash2"/>
<div data-tag="dashedvalue" id="data1"/>
</span>
</div>
<x id="xid">
<z id="zida"/>
<z id="zidab"/>
<z id="zidac"/>
</x>
<y id="yid">
<z id="zidb"/>
</y>
<p lang="en" id="lang-en">English</p>
<p lang="en-gb" id="lang-en-gb">English UK</p>
<p lang="en-us" id="lang-en-us">English US</p>
<p lang="fr" id="lang-fr">French</p>
</div>
<div id="footer">
</div>
"""
def setup_method(self):
self.soup = BeautifulSoup(self.HTML, 'html.parser')
def assert_selects(self, selector, expected_ids, **kwargs):
results = self.soup.select(selector, **kwargs)
assert isinstance(results, ResultSet)
el_ids = [el['id'] for el in results]
el_ids.sort()
expected_ids.sort()
assert expected_ids == el_ids, "Selector %s, expected [%s], got [%s]" % (
selector, ', '.join(expected_ids), ', '.join(el_ids)
)
assertSelect = assert_selects
def assert_select_multiple(self, *tests):
for selector, expected_ids in tests:
self.assert_selects(selector, expected_ids)
def test_precompiled(self):
sel = self.soup.css.compile('div')
els = self.soup.select(sel)
assert len(els) == 4
for div in els:
assert div.name == 'div'
el = self.soup.select_one(sel)
assert 'main' == el['id']
def test_one_tag_one(self):
els = self.soup.select('title')
assert len(els) == 1
assert els[0].name == 'title'
assert els[0].contents == ['The title']
def test_one_tag_many(self):
els = self.soup.select('div')
assert len(els) == 4
for div in els:
assert div.name == 'div'
el = self.soup.select_one('div')
assert 'main' == el['id']
def test_select_one_returns_none_if_no_match(self):
match = self.soup.select_one('nonexistenttag')
assert None == match
def test_tag_in_tag_one(self):
els = self.soup.select('div div')
self.assert_selects('div div', ['inner', 'data1'])
def test_tag_in_tag_many(self):
for selector in ('html div', 'html body div', 'body div'):
self.assert_selects(selector, ['data1', 'main', 'inner', 'footer'])
def test_limit(self):
self.assert_selects('html div', ['main'], limit=1)
self.assert_selects('html body div', ['inner', 'main'], limit=2)
self.assert_selects('body div', ['data1', 'main', 'inner', 'footer'],
limit=10)
def test_tag_no_match(self):
assert len(self.soup.select('del')) == 0
def test_invalid_tag(self):
with pytest.raises(SelectorSyntaxError):
self.soup.select('tag%t')
def test_select_dashed_tag_ids(self):
self.assert_selects('custom-dashed-tag', ['dash1', 'dash2'])
def test_select_dashed_by_id(self):
dashed = self.soup.select('custom-dashed-tag[id=\"dash2\"]')
assert dashed[0].name == 'custom-dashed-tag'
assert dashed[0]['id'] == 'dash2'
def test_dashed_tag_text(self):
assert self.soup.select('body > custom-dashed-tag')[0].text == 'Hello there.'
def test_select_dashed_matches_find_all(self):
assert self.soup.select('custom-dashed-tag') == self.soup.find_all('custom-dashed-tag')
def test_header_tags(self):
self.assert_select_multiple(
('h1', ['header1']),
('h2', ['header2', 'header3']),
)
def test_class_one(self):
for selector in ('.onep', 'p.onep', 'html p.onep'):
els = self.soup.select(selector)
assert len(els) == 1
assert els[0].name == 'p'
assert els[0]['class'] == ['onep']
def test_class_mismatched_tag(self):
els = self.soup.select('div.onep')
assert len(els) == 0
def test_one_id(self):
for selector in ('div#inner', '#inner', 'div div#inner'):
self.assert_selects(selector, ['inner'])
def test_bad_id(self):
els = self.soup.select('#doesnotexist')
assert len(els) == 0
def test_items_in_id(self):
els = self.soup.select('div#inner p')
assert len(els) == 3
for el in els:
assert el.name == 'p'
assert els[1]['class'] == ['onep']
assert not els[0].has_attr('class')
def test_a_bunch_of_emptys(self):
for selector in ('div#main del', 'div#main div.oops', 'div div#main'):
assert len(self.soup.select(selector)) == 0
def test_multi_class_support(self):
for selector in ('.class1', 'p.class1', '.class2', 'p.class2',
'.class3', 'p.class3', 'html p.class2', 'div#inner .class2'):
self.assert_selects(selector, ['pmulti'])
def test_multi_class_selection(self):
for selector in ('.class1.class3', '.class3.class2',
'.class1.class2.class3'):
self.assert_selects(selector, ['pmulti'])
def test_child_selector(self):
self.assert_selects('.s1 > a', ['s1a1', 's1a2'])
self.assert_selects('.s1 > a span', ['s1a2s1'])
def test_child_selector_id(self):
self.assert_selects('.s1 > a#s1a2 span', ['s1a2s1'])
def test_attribute_equals(self):
self.assert_select_multiple(
('p[class="onep"]', ['p1']),
('p[id="p1"]', ['p1']),
('[class="onep"]', ['p1']),
('[id="p1"]', ['p1']),
('link[rel="stylesheet"]', ['l1']),
('link[type="text/css"]', ['l1']),
('link[href="blah.css"]', ['l1']),
('link[href="no-blah.css"]', []),
('[rel="stylesheet"]', ['l1']),
('[type="text/css"]', ['l1']),
('[href="blah.css"]', ['l1']),
('[href="no-blah.css"]', []),
('p[href="no-blah.css"]', []),
('[href="no-blah.css"]', []),
)
def test_attribute_tilde(self):
self.assert_select_multiple(
('p[class~="class1"]', ['pmulti']),
('p[class~="class2"]', ['pmulti']),
('p[class~="class3"]', ['pmulti']),
('[class~="class1"]', ['pmulti']),
('[class~="class2"]', ['pmulti']),
('[class~="class3"]', ['pmulti']),
('a[rel~="friend"]', ['bob']),
('a[rel~="met"]', ['bob']),
('[rel~="friend"]', ['bob']),
('[rel~="met"]', ['bob']),
)
def test_attribute_startswith(self):
self.assert_select_multiple(
('[rel^="style"]', ['l1']),
('link[rel^="style"]', ['l1']),
('notlink[rel^="notstyle"]', []),
('[rel^="notstyle"]', []),
('link[rel^="notstyle"]', []),
('link[href^="bla"]', ['l1']),
('a[href^="http://"]', ['bob', 'me']),
('[href^="http://"]', ['bob', 'me']),
('[id^="p"]', ['pmulti', 'p1']),
('[id^="m"]', ['me', 'main']),
('div[id^="m"]', ['main']),
('a[id^="m"]', ['me']),
('div[data-tag^="dashed"]', ['data1'])
)
def test_attribute_endswith(self):
self.assert_select_multiple(
('[href$=".css"]', ['l1']),
('link[href$=".css"]', ['l1']),
('link[id$="1"]', ['l1']),
('[id$="1"]', ['data1', 'l1', 'p1', 'header1', 's1a1', 's2a1', 's1a2s1', 'dash1']),
('div[id$="1"]', ['data1']),
('[id$="noending"]', []),
)
def test_attribute_contains(self):
self.assert_select_multiple(
# From test_attribute_startswith
('[rel*="style"]', ['l1']),
('link[rel*="style"]', ['l1']),
('notlink[rel*="notstyle"]', []),
('[rel*="notstyle"]', []),
('link[rel*="notstyle"]', []),
('link[href*="bla"]', ['l1']),
('[href*="http://"]', ['bob', 'me']),
('[id*="p"]', ['pmulti', 'p1']),
('div[id*="m"]', ['main']),
('a[id*="m"]', ['me']),
# From test_attribute_endswith
('[href*=".css"]', ['l1']),
('link[href*=".css"]', ['l1']),
('link[id*="1"]', ['l1']),
('[id*="1"]', ['data1', 'l1', 'p1', 'header1', 's1a1', 's1a2', 's2a1', 's1a2s1', 'dash1']),
('div[id*="1"]', ['data1']),
('[id*="noending"]', []),
# New for this test
('[href*="."]', ['bob', 'me', 'l1']),
('a[href*="."]', ['bob', 'me']),
('link[href*="."]', ['l1']),
('div[id*="n"]', ['main', 'inner']),
('div[id*="nn"]', ['inner']),
('div[data-tag*="edval"]', ['data1'])
)
def test_attribute_exact_or_hypen(self):
self.assert_select_multiple(
('p[lang|="en"]', ['lang-en', 'lang-en-gb', 'lang-en-us']),
('[lang|="en"]', ['lang-en', 'lang-en-gb', 'lang-en-us']),
('p[lang|="fr"]', ['lang-fr']),
('p[lang|="gb"]', []),
)
def test_attribute_exists(self):
self.assert_select_multiple(
('[rel]', ['l1', 'bob', 'me']),
('link[rel]', ['l1']),
('a[rel]', ['bob', 'me']),
('[lang]', ['lang-en', 'lang-en-gb', 'lang-en-us', 'lang-fr']),
('p[class]', ['p1', 'pmulti']),
('[blah]', []),
('p[blah]', []),
('div[data-tag]', ['data1'])
)
def test_quoted_space_in_selector_name(self):
html = """<div style="display: wrong">nope</div>
<div style="display: right">yes</div>
"""
soup = BeautifulSoup(html, 'html.parser')
[chosen] = soup.select('div[style="display: right"]')
assert "yes" == chosen.string
def test_unsupported_pseudoclass(self):
with pytest.raises(NotImplementedError):
self.soup.select("a:no-such-pseudoclass")
with pytest.raises(SelectorSyntaxError):
self.soup.select("a:nth-of-type(a)")
def test_nth_of_type(self):
# Try to select first paragraph
els = self.soup.select('div#inner p:nth-of-type(1)')
assert len(els) == 1
assert els[0].string == 'Some text'
# Try to select third paragraph
els = self.soup.select('div#inner p:nth-of-type(3)')
assert len(els) == 1
assert els[0].string == 'Another'
# Try to select (non-existent!) fourth paragraph
els = self.soup.select('div#inner p:nth-of-type(4)')
assert len(els) == 0
# Zero will select no tags.
els = self.soup.select('div p:nth-of-type(0)')
assert len(els) == 0
def test_nth_of_type_direct_descendant(self):
els = self.soup.select('div#inner > p:nth-of-type(1)')
assert len(els) == 1
assert els[0].string == 'Some text'
def test_id_child_selector_nth_of_type(self):
self.assert_selects('#inner > p:nth-of-type(2)', ['p1'])
def test_select_on_element(self):
# Other tests operate on the tree; this operates on an element
# within the tree.
inner = self.soup.find("div", id="main")
selected = inner.select("div")
# The <div id="inner"> tag was selected. The <div id="footer">
# tag was not.
self.assert_selects_ids(selected, ['inner', 'data1'])
def test_overspecified_child_id(self):
self.assert_selects(".fancy #inner", ['inner'])
self.assert_selects(".normal #inner", [])
def test_adjacent_sibling_selector(self):
self.assert_selects('#p1 + h2', ['header2'])
self.assert_selects('#p1 + h2 + p', ['pmulti'])
self.assert_selects('#p1 + #header2 + .class1', ['pmulti'])
assert [] == self.soup.select('#p1 + p')
def test_general_sibling_selector(self):
self.assert_selects('#p1 ~ h2', ['header2', 'header3'])
self.assert_selects('#p1 ~ #header2', ['header2'])
self.assert_selects('#p1 ~ h2 + a', ['me'])
self.assert_selects('#p1 ~ h2 + [rel="me"]', ['me'])
assert [] == self.soup.select('#inner ~ h2')
def test_dangling_combinator(self):
with pytest.raises(SelectorSyntaxError):
self.soup.select('h1 >')
def test_sibling_combinator_wont_select_same_tag_twice(self):
self.assert_selects('p[lang] ~ p', ['lang-en-gb', 'lang-en-us', 'lang-fr'])
# Test the selector grouping operator (the comma)
def test_multiple_select(self):
self.assert_selects('x, y', ['xid', 'yid'])
def test_multiple_select_with_no_space(self):
self.assert_selects('x,y', ['xid', 'yid'])
def test_multiple_select_with_more_space(self):
self.assert_selects('x, y', ['xid', 'yid'])
def test_multiple_select_duplicated(self):
self.assert_selects('x, x', ['xid'])
def test_multiple_select_sibling(self):
self.assert_selects('x, y ~ p[lang=fr]', ['xid', 'lang-fr'])
def test_multiple_select_tag_and_direct_descendant(self):
self.assert_selects('x, y > z', ['xid', 'zidb'])
def test_multiple_select_direct_descendant_and_tags(self):
self.assert_selects('div > x, y, z', ['xid', 'yid', 'zida', 'zidb', 'zidab', 'zidac'])
def test_multiple_select_indirect_descendant(self):
self.assert_selects('div x,y, z', ['xid', 'yid', 'zida', 'zidb', 'zidab', 'zidac'])
def test_invalid_multiple_select(self):
with pytest.raises(SelectorSyntaxError):
self.soup.select(',x, y')
with pytest.raises(SelectorSyntaxError):
self.soup.select('x,,y')
def test_multiple_select_attrs(self):
self.assert_selects('p[lang=en], p[lang=en-gb]', ['lang-en', 'lang-en-gb'])
def test_multiple_select_ids(self):
self.assert_selects('x, y > z[id=zida], z[id=zidab], z[id=zidb]', ['xid', 'zidb', 'zidab'])
def test_multiple_select_nested(self):
self.assert_selects('body > div > x, y > z', ['xid', 'zidb'])
def test_select_duplicate_elements(self):
# When markup contains duplicate elements, a multiple select
# will find all of them.
markup = '<div class="c1"/><div class="c2"/><div class="c1"/>'
soup = BeautifulSoup(markup, 'html.parser')
selected = soup.select(".c1, .c2")
assert 3 == len(selected)
# Verify that find_all finds the same elements, though because
# of an implementation detail it finds them in a different
# order.
for element in soup.find_all(class_=['c1', 'c2']):
assert element in selected
def test_closest(self):
inner = self.soup.find("div", id="inner")
closest = inner.css.closest("div[id=main]")
assert closest == self.soup.find("div", id="main")
def test_match(self):
inner = self.soup.find("div", id="inner")
main = self.soup.find("div", id="main")
assert inner.css.match("div[id=main]") == False
assert main.css.match("div[id=main]") == True
def test_iselect(self):
gen = self.soup.css.iselect("h2")
assert isinstance(gen, types.GeneratorType)
[header2, header3] = gen
assert header2['id'] == 'header2'
assert header3['id'] == 'header3'
def test_filter(self):
inner = self.soup.find("div", id="inner")
results = inner.css.filter("h2")
assert len(inner.css.filter("h2")) == 2
results = inner.css.filter("h2[id=header3]")
assert isinstance(results, ResultSet)
[result] = results
assert result['id'] == 'header3'
def test_escape(self):
m = self.soup.css.escape
assert m(".foo#bar") == '\\.foo\\#bar'
assert m("()[]{}") == '\\(\\)\\[\\]\\{\\}'
assert m(".foo") == self.soup.css.escape(".foo")

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.venv/Lib/site-packages/bs4/tests/test_dammit.py
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# encoding: utf-8
import pytest
import logging
import bs4
from bs4 import BeautifulSoup
from bs4.dammit import (
EntitySubstitution,
EncodingDetector,
UnicodeDammit,
)
class TestUnicodeDammit(object):
"""Standalone tests of UnicodeDammit."""
def test_unicode_input(self):
markup = "I'm already Unicode! \N{SNOWMAN}"
dammit = UnicodeDammit(markup)
assert dammit.unicode_markup == markup
@pytest.mark.parametrize(
"smart_quotes_to,expect_converted",
[(None, "\u2018\u2019\u201c\u201d"),
("xml", "&#x2018;&#x2019;&#x201C;&#x201D;"),
("html", "&lsquo;&rsquo;&ldquo;&rdquo;"),
("ascii", "''" + '""'),
]
)
def test_smart_quotes_to(self, smart_quotes_to, expect_converted):
"""Verify the functionality of the smart_quotes_to argument
to the UnicodeDammit constructor."""
markup = b"<foo>\x91\x92\x93\x94</foo>"
converted = UnicodeDammit(
markup, known_definite_encodings=["windows-1252"],
smart_quotes_to=smart_quotes_to
).unicode_markup
assert converted == "<foo>{}</foo>".format(expect_converted)
def test_detect_utf8(self):
utf8 = b"Sacr\xc3\xa9 bleu! \xe2\x98\x83"
dammit = UnicodeDammit(utf8)
assert dammit.original_encoding.lower() == 'utf-8'
assert dammit.unicode_markup == 'Sacr\xe9 bleu! \N{SNOWMAN}'
def test_convert_hebrew(self):
hebrew = b"\xed\xe5\xec\xf9"
dammit = UnicodeDammit(hebrew, ["iso-8859-8"])
assert dammit.original_encoding.lower() == 'iso-8859-8'
assert dammit.unicode_markup == '\u05dd\u05d5\u05dc\u05e9'
def test_dont_see_smart_quotes_where_there_are_none(self):
utf_8 = b"\343\202\261\343\203\274\343\202\277\343\202\244 Watch"
dammit = UnicodeDammit(utf_8)
assert dammit.original_encoding.lower() == 'utf-8'
assert dammit.unicode_markup.encode("utf-8") == utf_8
def test_ignore_inappropriate_codecs(self):
utf8_data = "Räksmörgås".encode("utf-8")
dammit = UnicodeDammit(utf8_data, ["iso-8859-8"])
assert dammit.original_encoding.lower() == 'utf-8'
def test_ignore_invalid_codecs(self):
utf8_data = "Räksmörgås".encode("utf-8")
for bad_encoding in ['.utf8', '...', 'utF---16.!']:
dammit = UnicodeDammit(utf8_data, [bad_encoding])
assert dammit.original_encoding.lower() == 'utf-8'
def test_exclude_encodings(self):
# This is UTF-8.
utf8_data = "Räksmörgås".encode("utf-8")
# But if we exclude UTF-8 from consideration, the guess is
# Windows-1252.
dammit = UnicodeDammit(utf8_data, exclude_encodings=["utf-8"])
assert dammit.original_encoding.lower() == 'windows-1252'
# And if we exclude that, there is no valid guess at all.
dammit = UnicodeDammit(
utf8_data, exclude_encodings=["utf-8", "windows-1252"])
assert dammit.original_encoding == None
class TestEncodingDetector(object):
def test_encoding_detector_replaces_junk_in_encoding_name_with_replacement_character(self):
detected = EncodingDetector(
b'<?xml version="1.0" encoding="UTF-\xdb" ?>')
encodings = list(detected.encodings)
assert 'utf-\N{REPLACEMENT CHARACTER}' in encodings
def test_detect_html5_style_meta_tag(self):
for data in (
b'<html><meta charset="euc-jp" /></html>',
b"<html><meta charset='euc-jp' /></html>",
b"<html><meta charset=euc-jp /></html>",
b"<html><meta charset=euc-jp/></html>"):
dammit = UnicodeDammit(data, is_html=True)
assert "euc-jp" == dammit.original_encoding
def test_last_ditch_entity_replacement(self):
# This is a UTF-8 document that contains bytestrings
# completely incompatible with UTF-8 (ie. encoded with some other
# encoding).
#
# Since there is no consistent encoding for the document,
# Unicode, Dammit will eventually encode the document as UTF-8
# and encode the incompatible characters as REPLACEMENT
# CHARACTER.
#
# If chardet is installed, it will detect that the document
# can be converted into ISO-8859-1 without errors. This happens
# to be the wrong encoding, but it is a consistent encoding, so the
# code we're testing here won't run.
#
# So we temporarily disable chardet if it's present.
doc = b"""\357\273\277<?xml version="1.0" encoding="UTF-8"?>
<html><b>\330\250\330\252\330\261</b>
<i>\310\322\321\220\312\321\355\344</i></html>"""
chardet = bs4.dammit.chardet_dammit
logging.disable(logging.WARNING)
try:
def noop(str):
return None
bs4.dammit.chardet_dammit = noop
dammit = UnicodeDammit(doc)
assert True == dammit.contains_replacement_characters
assert "\ufffd" in dammit.unicode_markup
soup = BeautifulSoup(doc, "html.parser")
assert soup.contains_replacement_characters
finally:
logging.disable(logging.NOTSET)
bs4.dammit.chardet_dammit = chardet
def test_byte_order_mark_removed(self):
# A document written in UTF-16LE will have its byte order marker stripped.
data = b'\xff\xfe<\x00a\x00>\x00\xe1\x00\xe9\x00<\x00/\x00a\x00>\x00'
dammit = UnicodeDammit(data)
assert "<a>áé</a>" == dammit.unicode_markup
assert "utf-16le" == dammit.original_encoding
def test_known_definite_versus_user_encodings(self):
# The known_definite_encodings are used before sniffing the
# byte-order mark; the user_encodings are used afterwards.
# Here's a document in UTF-16LE.
data = b'\xff\xfe<\x00a\x00>\x00\xe1\x00\xe9\x00<\x00/\x00a\x00>\x00'
dammit = UnicodeDammit(data)
# We can process it as UTF-16 by passing it in as a known
# definite encoding.
before = UnicodeDammit(data, known_definite_encodings=["utf-16"])
assert "utf-16" == before.original_encoding
# If we pass UTF-18 as a user encoding, it's not even
# tried--the encoding sniffed from the byte-order mark takes
# precedence.
after = UnicodeDammit(data, user_encodings=["utf-8"])
assert "utf-16le" == after.original_encoding
assert ["utf-16le"] == [x[0] for x in dammit.tried_encodings]
# Here's a document in ISO-8859-8.
hebrew = b"\xed\xe5\xec\xf9"
dammit = UnicodeDammit(hebrew, known_definite_encodings=["utf-8"],
user_encodings=["iso-8859-8"])
# The known_definite_encodings don't work, BOM sniffing does
# nothing (it only works for a few UTF encodings), but one of
# the user_encodings does work.
assert "iso-8859-8" == dammit.original_encoding
assert ["utf-8", "iso-8859-8"] == [x[0] for x in dammit.tried_encodings]
def test_deprecated_override_encodings(self):
# override_encodings is a deprecated alias for
# known_definite_encodings.
hebrew = b"\xed\xe5\xec\xf9"
dammit = UnicodeDammit(
hebrew,
known_definite_encodings=["shift-jis"],
override_encodings=["utf-8"],
user_encodings=["iso-8859-8"],
)
assert "iso-8859-8" == dammit.original_encoding
# known_definite_encodings and override_encodings were tried
# before user_encodings.
assert ["shift-jis", "utf-8", "iso-8859-8"] == (
[x[0] for x in dammit.tried_encodings]
)
def test_detwingle(self):
# Here's a UTF8 document.
utf8 = ("\N{SNOWMAN}" * 3).encode("utf8")
# Here's a Windows-1252 document.
windows_1252 = (
"\N{LEFT DOUBLE QUOTATION MARK}Hi, I like Windows!"
"\N{RIGHT DOUBLE QUOTATION MARK}").encode("windows_1252")
# Through some unholy alchemy, they've been stuck together.
doc = utf8 + windows_1252 + utf8
# The document can't be turned into UTF-8:
with pytest.raises(UnicodeDecodeError):
doc.decode("utf8")
# Unicode, Dammit thinks the whole document is Windows-1252,
# and decodes it into "☃☃☃“Hi, I like Windows!”☃☃☃"
# But if we run it through fix_embedded_windows_1252, it's fixed:
fixed = UnicodeDammit.detwingle(doc)
assert "☃☃☃“Hi, I like Windows!”☃☃☃" == fixed.decode("utf8")
def test_detwingle_ignores_multibyte_characters(self):
# Each of these characters has a UTF-8 representation ending
# in \x93. \x93 is a smart quote if interpreted as
# Windows-1252. But our code knows to skip over multibyte
# UTF-8 characters, so they'll survive the process unscathed.
for tricky_unicode_char in (
"\N{LATIN SMALL LIGATURE OE}", # 2-byte char '\xc5\x93'
"\N{LATIN SUBSCRIPT SMALL LETTER X}", # 3-byte char '\xe2\x82\x93'
"\xf0\x90\x90\x93", # This is a CJK character, not sure which one.
):
input = tricky_unicode_char.encode("utf8")
assert input.endswith(b'\x93')
output = UnicodeDammit.detwingle(input)
assert output == input
def test_find_declared_encoding(self):
# Test our ability to find a declared encoding inside an
# XML or HTML document.
#
# Even if the document comes in as Unicode, it may be
# interesting to know what encoding was claimed
# originally.
html_unicode = '<html><head><meta charset="utf-8"></head></html>'
html_bytes = html_unicode.encode("ascii")
xml_unicode= '<?xml version="1.0" encoding="ISO-8859-1" ?>'
xml_bytes = xml_unicode.encode("ascii")
m = EncodingDetector.find_declared_encoding
assert m(html_unicode, is_html=False) is None
assert "utf-8" == m(html_unicode, is_html=True)
assert "utf-8" == m(html_bytes, is_html=True)
assert "iso-8859-1" == m(xml_unicode)
assert "iso-8859-1" == m(xml_bytes)
# Normally, only the first few kilobytes of a document are checked for
# an encoding.
spacer = b' ' * 5000
assert m(spacer + html_bytes) is None
assert m(spacer + xml_bytes) is None
# But you can tell find_declared_encoding to search an entire
# HTML document.
assert (
m(spacer + html_bytes, is_html=True, search_entire_document=True)
== "utf-8"
)
# The XML encoding declaration has to be the very first thing
# in the document. We'll allow whitespace before the document
# starts, but nothing else.
assert m(xml_bytes, search_entire_document=True) == "iso-8859-1"
assert m(b' ' + xml_bytes, search_entire_document=True) == "iso-8859-1"
assert m(b'a' + xml_bytes, search_entire_document=True) is None
class TestEntitySubstitution(object):
"""Standalone tests of the EntitySubstitution class."""
def setup_method(self):
self.sub = EntitySubstitution
@pytest.mark.parametrize(
"original,substituted",
[
# Basic case. Unicode characters corresponding to named
# HTML entites are substituted; others are not.
("foo\u2200\N{SNOWMAN}\u00f5bar",
"foo&forall;\N{SNOWMAN}&otilde;bar"),
# MS smart quotes are a common source of frustration, so we
# give them a special test.
('‘’foo“”', "&lsquo;&rsquo;foo&ldquo;&rdquo;"),
]
)
def test_substitute_html(self, original, substituted):
assert self.sub.substitute_html(original) == substituted
def test_html5_entity(self):
for entity, u in (
# A few spot checks of our ability to recognize
# special character sequences and convert them
# to named entities.
('&models;', '\u22a7'),
('&Nfr;', '\U0001d511'),
('&ngeqq;', '\u2267\u0338'),
('&not;', '\xac'),
('&Not;', '\u2aec'),
# We _could_ convert | to &verbarr;, but we don't, because
# | is an ASCII character.
('|' '|'),
# Similarly for the fj ligature, which we could convert to
# &fjlig;, but we don't.
("fj", "fj"),
# We do convert _these_ ASCII characters to HTML entities,
# because that's required to generate valid HTML.
('&gt;', '>'),
('&lt;', '<'),
('&amp;', '&'),
):
template = '3 %s 4'
raw = template % u
with_entities = template % entity
assert self.sub.substitute_html(raw) == with_entities
def test_html5_entity_with_variation_selector(self):
# Some HTML5 entities correspond either to a single-character
# Unicode sequence _or_ to the same character plus U+FE00,
# VARIATION SELECTOR 1. We can handle this.
data = "fjords \u2294 penguins"
markup = "fjords &sqcup; penguins"
assert self.sub.substitute_html(data) == markup
data = "fjords \u2294\ufe00 penguins"
markup = "fjords &sqcups; penguins"
assert self.sub.substitute_html(data) == markup
def test_xml_converstion_includes_no_quotes_if_make_quoted_attribute_is_false(self):
s = 'Welcome to "my bar"'
assert self.sub.substitute_xml(s, False) == s
def test_xml_attribute_quoting_normally_uses_double_quotes(self):
assert self.sub.substitute_xml("Welcome", True) == '"Welcome"'
assert self.sub.substitute_xml("Bob's Bar", True) == '"Bob\'s Bar"'
def test_xml_attribute_quoting_uses_single_quotes_when_value_contains_double_quotes(self):
s = 'Welcome to "my bar"'
assert self.sub.substitute_xml(s, True) == "'Welcome to \"my bar\"'"
def test_xml_attribute_quoting_escapes_single_quotes_when_value_contains_both_single_and_double_quotes(self):
s = 'Welcome to "Bob\'s Bar"'
assert self.sub.substitute_xml(s, True) == '"Welcome to &quot;Bob\'s Bar&quot;"'
def test_xml_quotes_arent_escaped_when_value_is_not_being_quoted(self):
quoted = 'Welcome to "Bob\'s Bar"'
assert self.sub.substitute_xml(quoted) == quoted
def test_xml_quoting_handles_angle_brackets(self):
assert self.sub.substitute_xml("foo<bar>") == "foo&lt;bar&gt;"
def test_xml_quoting_handles_ampersands(self):
assert self.sub.substitute_xml("AT&T") == "AT&amp;T"
def test_xml_quoting_including_ampersands_when_they_are_part_of_an_entity(self):
assert self.sub.substitute_xml("&Aacute;T&T") == "&amp;Aacute;T&amp;T"
def test_xml_quoting_ignoring_ampersands_when_they_are_part_of_an_entity(self):
assert self.sub.substitute_xml_containing_entities("&Aacute;T&T") == "&Aacute;T&amp;T"
def test_quotes_not_html_substituted(self):
"""There's no need to do this except inside attribute values."""
text = 'Bob\'s "bar"'
assert self.sub.substitute_html(text) == text

38
.venv/Lib/site-packages/bs4/tests/test_docs.py
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@ -0,0 +1,38 @@
"Test harness for doctests."
# TODO: Pretty sure this isn't used and should be deleted.
# pylint: disable-msg=E0611,W0142
__metaclass__ = type
__all__ = [
'additional_tests',
]
import atexit
import doctest
import os
#from pkg_resources import (
# resource_filename, resource_exists, resource_listdir, cleanup_resources)
import unittest
DOCTEST_FLAGS = (
doctest.ELLIPSIS |
doctest.NORMALIZE_WHITESPACE |
doctest.REPORT_NDIFF)
# def additional_tests():
# "Run the doc tests (README.txt and docs/*, if any exist)"
# doctest_files = [
# os.path.abspath(resource_filename('bs4', 'README.txt'))]
# if resource_exists('bs4', 'docs'):
# for name in resource_listdir('bs4', 'docs'):
# if name.endswith('.txt'):
# doctest_files.append(
# os.path.abspath(
# resource_filename('bs4', 'docs/%s' % name)))
# kwargs = dict(module_relative=False, optionflags=DOCTEST_FLAGS)
# atexit.register(cleanup_resources)
# return unittest.TestSuite((
# doctest.DocFileSuite(*doctest_files, **kwargs)))

74
.venv/Lib/site-packages/bs4/tests/test_element.py
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"""Tests of classes in element.py.
The really big classes -- Tag, PageElement, and NavigableString --
are tested in separate files.
"""
from bs4.element import (
CharsetMetaAttributeValue,
ContentMetaAttributeValue,
NamespacedAttribute,
)
from . import SoupTest
class TestNamedspacedAttribute(object):
def test_name_may_be_none_or_missing(self):
a = NamespacedAttribute("xmlns", None)
assert a == "xmlns"
a = NamespacedAttribute("xmlns", "")
assert a == "xmlns"
a = NamespacedAttribute("xmlns")
assert a == "xmlns"
def test_namespace_may_be_none_or_missing(self):
a = NamespacedAttribute(None, "tag")
assert a == "tag"
a = NamespacedAttribute("", "tag")
assert a == "tag"
def test_attribute_is_equivalent_to_colon_separated_string(self):
a = NamespacedAttribute("a", "b")
assert "a:b" == a
def test_attributes_are_equivalent_if_prefix_and_name_identical(self):
a = NamespacedAttribute("a", "b", "c")
b = NamespacedAttribute("a", "b", "c")
assert a == b
# The actual namespace is not considered.
c = NamespacedAttribute("a", "b", None)
assert a == c
# But name and prefix are important.
d = NamespacedAttribute("a", "z", "c")
assert a != d
e = NamespacedAttribute("z", "b", "c")
assert a != e
class TestAttributeValueWithCharsetSubstitution(object):
"""Certain attributes are designed to have the charset of the
final document substituted into their value.
"""
def test_content_meta_attribute_value(self):
# The value of a CharsetMetaAttributeValue is whatever
# encoding the string is in.
value = CharsetMetaAttributeValue("euc-jp")
assert "euc-jp" == value
assert "euc-jp" == value.original_value
assert "utf8" == value.encode("utf8")
assert "ascii" == value.encode("ascii")
def test_content_meta_attribute_value(self):
value = ContentMetaAttributeValue("text/html; charset=euc-jp")
assert "text/html; charset=euc-jp" == value
assert "text/html; charset=euc-jp" == value.original_value
assert "text/html; charset=utf8" == value.encode("utf8")
assert "text/html; charset=ascii" == value.encode("ascii")

113
.venv/Lib/site-packages/bs4/tests/test_formatter.py
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@ -0,0 +1,113 @@
import pytest
from bs4.element import Tag
from bs4.formatter import (
Formatter,
HTMLFormatter,
XMLFormatter,
)
from . import SoupTest
class TestFormatter(SoupTest):
def test_default_attributes(self):
# Test the default behavior of Formatter.attributes().
formatter = Formatter()
tag = Tag(name="tag")
tag['b'] = 1
tag['a'] = 2
# Attributes come out sorted by name. In Python 3, attributes
# normally come out of a dictionary in the order they were
# added.
assert [('a', 2), ('b', 1)] == formatter.attributes(tag)
# This works even if Tag.attrs is None, though this shouldn't
# normally happen.
tag.attrs = None
assert [] == formatter.attributes(tag)
assert ' ' == formatter.indent
def test_sort_attributes(self):
# Test the ability to override Formatter.attributes() to,
# e.g., disable the normal sorting of attributes.
class UnsortedFormatter(Formatter):
def attributes(self, tag):
self.called_with = tag
for k, v in sorted(tag.attrs.items()):
if k == 'ignore':
continue
yield k,v
soup = self.soup('<p cval="1" aval="2" ignore="ignored"></p>')
formatter = UnsortedFormatter()
decoded = soup.decode(formatter=formatter)
# attributes() was called on the <p> tag. It filtered out one
# attribute and sorted the other two.
assert formatter.called_with == soup.p
assert '<p aval="2" cval="1"></p>' == decoded
def test_empty_attributes_are_booleans(self):
# Test the behavior of empty_attributes_are_booleans as well
# as which Formatters have it enabled.
for name in ('html', 'minimal', None):
formatter = HTMLFormatter.REGISTRY[name]
assert False == formatter.empty_attributes_are_booleans
formatter = XMLFormatter.REGISTRY[None]
assert False == formatter.empty_attributes_are_booleans
formatter = HTMLFormatter.REGISTRY['html5']
assert True == formatter.empty_attributes_are_booleans
# Verify that the constructor sets the value.
formatter = Formatter(empty_attributes_are_booleans=True)
assert True == formatter.empty_attributes_are_booleans
# Now demonstrate what it does to markup.
for markup in (
"<option selected></option>",
'<option selected=""></option>'
):
soup = self.soup(markup)
for formatter in ('html', 'minimal', 'xml', None):
assert b'<option selected=""></option>' == soup.option.encode(formatter='html')
assert b'<option selected></option>' == soup.option.encode(formatter='html5')
@pytest.mark.parametrize(
"indent,expect",
[
(None, '<a>\n<b>\ntext\n</b>\n</a>\n'),
(-1, '<a>\n<b>\ntext\n</b>\n</a>\n'),
(0, '<a>\n<b>\ntext\n</b>\n</a>\n'),
("", '<a>\n<b>\ntext\n</b>\n</a>\n'),
(1, '<a>\n <b>\n text\n </b>\n</a>\n'),
(2, '<a>\n <b>\n text\n </b>\n</a>\n'),
("\t", '<a>\n\t<b>\n\t\ttext\n\t</b>\n</a>\n'),
('abc', '<a>\nabc<b>\nabcabctext\nabc</b>\n</a>\n'),
# Some invalid inputs -- the default behavior is used.
(object(), '<a>\n <b>\n text\n </b>\n</a>\n'),
(b'bytes', '<a>\n <b>\n text\n </b>\n</a>\n'),
]
)
def test_indent(self, indent, expect):
# Pretty-print a tree with a Formatter set to
# indent in a certain way and verify the results.
soup = self.soup("<a><b>text</b></a>")
formatter = Formatter(indent=indent)
assert soup.prettify(formatter=formatter) == expect
# Pretty-printing only happens with prettify(), not
# encode().
assert soup.encode(formatter=formatter) != expect
def test_default_indent_value(self):
formatter = Formatter()
assert formatter.indent == ' '

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