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pycodestyle (formerly called pep8) - Python style guide checker
===============================================================
.. image:: https://github.com/PyCQA/pycodestyle/actions/workflows/main.yml/badge.svg
:target: https://github.com/PyCQA/pycodestyle/actions/workflows/main.yml
:alt: Build status
.. image:: https://readthedocs.org/projects/pycodestyle/badge/?version=latest
:target: https://pycodestyle.pycqa.org
:alt: Documentation Status
.. image:: https://img.shields.io/pypi/wheel/pycodestyle.svg
:target: https://pypi.org/project/pycodestyle/
:alt: Wheel Status
.. image:: https://badges.gitter.im/PyCQA/pycodestyle.svg
:alt: Join the chat at https://gitter.im/PyCQA/pycodestyle
:target: https://gitter.im/PyCQA/pycodestyle?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
pycodestyle is a tool to check your Python code against some of the style
conventions in `PEP 8`_.
.. _PEP 8: http://www.python.org/dev/peps/pep-0008/
.. note::
This package used to be called ``pep8`` but was renamed to ``pycodestyle``
to reduce confusion. Further discussion can be found `in the issue where
Guido requested this
change <https://github.com/PyCQA/pycodestyle/issues/466>`_, or in the
lightning talk at PyCon 2016 by @IanLee1521:
`slides <https://speakerdeck.com/ianlee1521/pep8-vs-pep-8>`_
`video <https://youtu.be/PulzIT8KYLk?t=36m>`_.
Features
--------
* Plugin architecture: Adding new checks is easy.
* Parseable output: Jump to error location in your editor.
* Small: Just one Python file, requires only stdlib. You can use just
the ``pycodestyle.py`` file for this purpose.
* Comes with a comprehensive test suite.
Installation
------------
You can install, upgrade, and uninstall ``pycodestyle.py`` with these commands::
$ pip install pycodestyle
$ pip install --upgrade pycodestyle
$ pip uninstall pycodestyle
There's also a package for Debian/Ubuntu, but it's not always the
latest version.
Example usage and output
------------------------
::
$ pycodestyle --first optparse.py
optparse.py:69:11: E401 multiple imports on one line
optparse.py:77:1: E302 expected 2 blank lines, found 1
optparse.py:88:5: E301 expected 1 blank line, found 0
optparse.py:347:31: E211 whitespace before '('
optparse.py:357:17: E201 whitespace after '{'
optparse.py:472:29: E221 multiple spaces before operator
You can also make ``pycodestyle.py`` show the source code for each error, and
even the relevant text from PEP 8::
$ pycodestyle --show-source --show-pep8 testsuite/E40.py
testsuite/E40.py:2:10: E401 multiple imports on one line
import os, sys
^
Imports should usually be on separate lines.
Okay: import os\nimport sys
E401: import sys, os
Or you can display how often each error was found::
$ pycodestyle --statistics -qq Python-2.5/Lib
232 E201 whitespace after '['
599 E202 whitespace before ')'
631 E203 whitespace before ','
842 E211 whitespace before '('
2531 E221 multiple spaces before operator
4473 E301 expected 1 blank line, found 0
4006 E302 expected 2 blank lines, found 1
165 E303 too many blank lines (4)
325 E401 multiple imports on one line
3615 E501 line too long (82 characters)
Links
-----
* `Read the documentation <https://pycodestyle.pycqa.org/>`_
* `Fork me on GitHub <http://github.com/PyCQA/pycodestyle>`_
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