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`Pylint`_
=========
.. _`Pylint`: https://pylint.pycqa.org/
.. image:: https://github.com/PyCQA/pylint/actions/workflows/tests.yaml/badge.svg?branch=main
:target: https://github.com/PyCQA/pylint/actions
.. image:: https://coveralls.io/repos/github/PyCQA/pylint/badge.svg?branch=main
:target: https://coveralls.io/github/PyCQA/pylint?branch=main
.. image:: https://img.shields.io/pypi/v/pylint.svg
:alt: Pypi Package version
:target: https://pypi.python.org/pypi/pylint
.. image:: https://readthedocs.org/projects/pylint/badge/?version=latest
:target: https://pylint.readthedocs.io/en/latest/?badge=latest
:alt: Documentation Status
.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/ambv/black
.. image:: https://img.shields.io/badge/linting-pylint-yellowgreen
:target: https://github.com/PyCQA/pylint
.. image:: https://results.pre-commit.ci/badge/github/PyCQA/pylint/main.svg
:target: https://results.pre-commit.ci/latest/github/PyCQA/pylint/main
:alt: pre-commit.ci status
What is Pylint ?
================
Pylint is a `static code analyser`_ for Python 2 or 3. The latest version supports Python
3.7.2 and above.
.. _`static code analyser`: https://en.wikipedia.org/wiki/Static_code_analysis
Pylint analyses your code without actually running it. It checks for errors, enforces a coding
standard, looks for `code smells`_, and can make suggestions about how the code could be refactored.
.. _`code smells`: https://martinfowler.com/bliki/CodeSmell.html
Projects that you might want to use alongside pylint include flake8_ (faster and simpler checks
with very few false positives), mypy_, pyright_ or pyre_ (typing checks), bandit_ (security
oriented checks), black_ and isort_ (auto-formatting), autoflake_ (automated removal of
unused import or variable), pyupgrade_ (automated upgrade to newer python syntax) and
pydocstringformatter_ (automated pep257).
.. _flake8: https://gitlab.com/pycqa/flake8/
.. _bandit: https://github.com/PyCQA/bandit
.. _mypy: https://github.com/python/mypy
.. _pyright: https://github.com/microsoft/pyright
.. _pyre: https://github.com/facebook/pyre-check
.. _black: https://github.com/psf/black
.. _autoflake: https://github.com/myint/autoflake
.. _pyupgrade: https://github.com/asottile/pyupgrade
.. _pydocstringformatter: https://github.com/DanielNoord/pydocstringformatter
.. _isort: https://pycqa.github.io/isort/
Pylint can infer actual values from your code using its internal code representation (astroid).
If your code is ``import logging as argparse``, Pylint will know that ``argparse.error(...)``
is in fact a logging call and not an argparse call.
Pylint isn't smarter than you: it may warn you about things that you have
conscientiously done or checks for some things that you don't care about.
During adoption, especially in a legacy project where pylint was never enforced,
it's best to start with the ``--errors-only`` flag, then disable
convention and refactor message with ``--disable=C,R`` and progressively
re-evaluate and re-enable messages as your priorities evolve.
Pylint ships with three additional tools:
- pyreverse_ (standalone tool that generates package and class diagrams.)
- symilar_ (duplicate code finder that is also integrated in pylint)
- epylint_ (Emacs and Flymake compatible Pylint)
.. _pyreverse: https://pylint.pycqa.org/en/latest/pyreverse.html
.. _symilar: https://pylint.pycqa.org/en/latest/symilar.html
.. _epylint: https://pylint.pycqa.org/en/latest/user_guide/ide_integration/flymake-emacs.html
Install
-------
For command line use, pylint is installed with::
pip install pylint
It can also be integrated in most editors or IDE. More information can be found
`in the documentation`_.
.. _in the documentation: https://pylint.pycqa.org/en/latest/user_guide/installation.html
Contributing
------------
We welcome all contributions, doc, code, checking issues for duplicate or telling us
that we can close them, confirming that it's still an issue, `creating issues because
you found a bug or want a feature`_... everything helps !
Please follow the `code of conduct`_ and check `the Contributor Guides`_ if you want to
make a code contribution.
.. _creating issues because you found a bug or want a feature: https://pylint.pycqa.org/en/latest/contact.html#bug-reports-feedback
.. _code of conduct: https://github.com/Pierre-Sassoulas/pylint/blob/main/CODE_OF_CONDUCT.md
.. _the Contributor Guides: https://pylint.pycqa.org/en/latest/development_guide/contribute.html
Show your usage
-----------------
You can place this badge in your README to let others know your project uses pylint.
.. image:: https://img.shields.io/badge/linting-pylint-yellowgreen
:target: https://github.com/PyCQA/pylint
See how in `the badge documentation`_.
.. _the badge documentation: https://pylint.pycqa.org/en/latest/user_guide/badge.html
License
-------
pylint is, with a few exceptions listed below, `GPLv2 <https://github.com/PyCQA/pylint/blob/main/LICENSE>`_.
The icon files are licensed under the `CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0/>`_ license:
- `doc/logo.png <https://raw.githubusercontent.com/PyCQA/pylint/main/doc/logo.png>`_
- `doc/logo.svg <https://raw.githubusercontent.com/PyCQA/pylint/main/doc/logo.svg>`_
Support
-------
Please check `the contact information`_.
.. _`the contact information`: https://pylint.pycqa.org/en/latest/contact.html
.. |tideliftlogo| image:: https://raw.githubusercontent.com/PyCQA/pylint/main/doc/media/Tidelift_Logos_RGB_Tidelift_Shorthand_On-White.png
:width: 200
:alt: Tidelift
.. list-table::
:widths: 10 100
* - |tideliftlogo|
- Professional support for pylint is available as part of the `Tidelift
Subscription`_. Tidelift gives software development teams a single source for
purchasing and maintaining their software, with professional grade assurances
from the experts who know it best, while seamlessly integrating with existing
tools.
.. _Tidelift Subscription: https://tidelift.com/subscription/pkg/pypi-pylint?utm_source=pypi-pylint&utm_medium=referral&utm_campaign=readme
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