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Python style guide checker

Project description

pep8 - Python style guide checker

pep8 is a tool to check your Python code against some of the style conventions in PEP 8.

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 pep8.py file for this purpose
  • Easy_installable, of course!

Installation

Just an easy_install pep8 ought to do the trick.

Example usage and output

$ pep8 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:222:34: W602 deprecated form of raising exception
optparse.py:347:31: E211 whitespace before '('
optparse.py:357:17: E201 whitespace after '{'
optparse.py:472:29: E221 multiple spaces before operator
optparse.py:544:21: W601 .has_key() is deprecated, use 'in'

You can also make pep8.py show the source code for each error, and even the relevant text from PEP 8:

$ pep8 --show-source --show-pep8 testsuite/E111.py
testsuite/E111.py:2:3: E111 indentation is not a multiple of four
  print x
  ^
    Use 4 spaces per indentation level.

    For really old code that you don't want to mess up, you can
    continue to use 8-space tabs.

Or you can display how often each error was found:

$ pep8 --statistics -qq --filename=*.py 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)
612     W601 .has_key() is deprecated, use 'in'
1188    W602 deprecated form of raising exception

Quick help is available on the command line:

$ pep8 -h
Usage: pep8.py [options] input ...

Options:
  -h, --help           show this help message and exit
  -v, --verbose        print status messages, or debug with -vv
  -q, --quiet          report only file names, or nothing with -qq
  --exclude=patterns   exclude files or directories which match these comma
                       separated patterns (default: .svn,CVS,.bzr,.hg,.git)
  --filename=patterns  when parsing directories, only check filenames matching
                       these comma separated patterns (default: *.py)
  --ignore=errors      skip errors and warnings (e.g. E4,W)
  --repeat             show all occurrences of the same error
  --show-source        show source code for each error
  --show-pep8          show text of PEP 8 for each error
  --statistics         count errors and warnings
  --count              count total number of errors and warnings
  --benchmark          measure processing speed
  --testsuite=dir      run regression tests from dir
  --doctest            run doctest on myself

Feedback

Your feedback is more than welcome. Write email to johann@rocholl.net or post bugs and feature requests here:

http://github.com/cburroughs/pep8.py/issues

Source download

The source code is currently available on github. Fork away!

http://github.com/cburroughs/pep8.py/ http://github.com/jcrocholl/pep8/

(Yes it’s lame two have two that are not forks of one another. At some point in the future it is hoped some git magic will clean this situating up.)

Changelog

0.4.2 (2009-10-22)

  • Decorators on classes and class methods are OK now.

0.4 (2009-10-20)

  • Support for all versions of Python from 2.3 to 3.1.
  • New and greatly expanded self tests.
  • Added –count option to print the total number of errors and warnings.
  • Further improvements to the handling of comments and blank lines. (Issue #1 and others changes.)
  • check all py files in directory when passed a directory (Issue #2). This also prevents an exception when traversing directories with non *.py files.
  • E231 should allow commas to be followed by ) (Issue #3)
  • Spaces are not longer required around the equals sign for keyword arguments or default parameter values.

0.3.1 (2009-09-14)

  • Fixes for comments: do not count them when checking for blank lines between items.
  • Added setup.py for pypi upload and easy_installability.

0.2 (2007-10-16)

  • Loads of fixes and improvements.

0.1 (2006-10-01)

  • First release.

TODO

  • script to verify testcases pass.
  • testcase for ignoring ‘#’ before function change change.
  • I have observed problems with decorators and 200 warnings, look into this.

Project details


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Filename, size & hash SHA256 hash help File type Python version Upload date
pep8-0.4.2.tar.gz (16.6 kB) Copy SHA256 hash SHA256 Source None Oct 22, 2009

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