pycodestyle (formerly called pep8) - Python style guide checker

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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 testing/data/E40.py
testing/data/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>_