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.

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, or in the lightning talk at PyCon 2016 by @IanLee1521: slides video.

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

License

correctmost/pycodestyle

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