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Name: flake8
Version: 2.1.0
Summary: the modular source code checker: pep8, pyflakes and co
Home-page: http://bitbucket.org/tarek/flake8
Author: Ian Cordasco
Author-email: graffatcolmingov@gmail.com
License: MIT
Description: ======
Flake8
======
Flake8 is a wrapper around these tools:
- PyFlakes
- pep8
- Ned Batchelder's McCabe script
Flake8 runs all the tools by launching the single ``flake8`` script.
It displays the warnings in a per-file, merged output.
It also adds a few features:
- files that contain this line are skipped::
# flake8: noqa
- lines that contain a ``# noqa`` comment at the end will not issue warnings.
- a Git and a Mercurial hook.
- a McCabe complexity checker.
- extendable through ``flake8.extension`` entry points.
QuickStart
==========
::
pip install flake8
To run flake8 just invoke it against any directory or Python module::
$ flake8 coolproject
coolproject/mod.py:97:1: F401 'shutil' imported but unused
coolproject/mod.py:625:17: E225 missing whitespace around operato
coolproject/mod.py:729:1: F811 redefinition of function 'readlines' from line 723
coolproject/mod.py:1028:1: F841 local variable 'errors' is assigned to but never used
The outputs of PyFlakes *and* pep8 (and the optional plugins) are merged
and returned.
flake8 offers an extra option: --max-complexity, which will emit a warning if
the McCabe complexity of a function is higher than the value. By default it's
deactivated::
$ flake8 --max-complexity 12 coolproject
coolproject/mod.py:97:1: F401 'shutil' imported but unused
coolproject/mod.py:625:17: E225 missing whitespace around operator
coolproject/mod.py:729:1: F811 redefinition of unused 'readlines' from line 723
coolproject/mod.py:939:1: C901 'Checker.check_all' is too complex (12)
coolproject/mod.py:1028:1: F841 local variable 'errors' is assigned to but never used
coolproject/mod.py:1204:1: C901 'selftest' is too complex (14)
This feature is quite useful to detect over-complex code. According to McCabe,
anything that goes beyond 10 is too complex.
See https://en.wikipedia.org/wiki/Cyclomatic_complexity.
Questions or Feedback
=====================
If you have questions you'd like to ask the developers, or feedback you'd like
to provide, feel free to use the mailing list: code-quality@python.org We
would love to hear from you. Additionally, if you have a feature you'd like to
suggest, the mailing list would be the best place for it.
.. _links:
Links
=====
* `flake8 documentation <http://flake8.readthedocs.org/en/latest/>`_
* `pep8 documentation <http://pep8.readthedocs.org/en/latest/>`_
CHANGES
=======
2.1.0 - 2013-10-26
------------------
- Add FLAKE8_LAZY and FLAKE8_IGNORE environment variable support to git and
mercurial hooks
- Force git and mercurial hooks to repsect configuration in setup.cfg
- Only check staged files if that is specified
- Fix hook file permissions
- Fix the git hook on python 3
- Ignore non-python files when running the git hook
- Ignore .tox directories by default
- Flake8 now reports the column number for PyFlakes messages
2.0.0 - 2013-02-23
------------------
- Pyflakes errors are prefixed by an ``F`` instead of an ``E``
- McCabe complexity warnings are prefixed by a ``C`` instead of a ``W``
- Flake8 supports extensions through entry points
- Due to the above support, we **require** setuptools
- We publish the `documentation <https://flake8.readthedocs.org/>`_
- Fixes #13: pep8, pyflakes and mccabe become external dependencies
- Split run.py into main.py, engine.py and hooks.py for better logic
- Expose our parser for our users
- New feature: Install git and hg hooks automagically
- By relying on pyflakes (0.6.1), we also fixed #45 and #35
1.7.0 - 2012-12-21
------------------
- Fixes part of #35: Exception for no WITHITEM being an attribute of Checker
for Python 3.3
- Support stdin
- Incorporate @phd's builtins pull request
- Fix the git hook
- Update pep8.py to the latest version
1.6.2 - 2012-11-25
------------------
- fixed the NameError: global name 'message' is not defined (#46)
1.6.1 - 2012-11-24
------------------
- fixed the mercurial hook, a change from a previous patch was not properly
applied
- fixed an assumption about warnings/error messages that caused an exception
to be thrown when McCabe is used
1.6 - 2012-11-16
----------------
- changed the signatures of the ``check_file`` function in flake8/run.py,
``skip_warning`` in flake8/util.py and the ``check``, ``checkPath``
functions in flake8/pyflakes.py.
- fix ``--exclude`` and ``--ignore`` command flags (#14, #19)
- fix the git hook that wasn't catching files not already added to the index
(#29)
- pre-emptively includes the addition to pep8 to ignore certain lines.
Add ``# nopep8`` to the end of a line to ignore it. (#37)
- ``check_file`` can now be used without any special prior setup (#21)
- unpacking exceptions will no longer cause an exception (#20)
- fixed crash on non-existent file (#38)
1.5 - 2012-10-13
----------------
- fixed the stdin
- make sure mccabe catches the syntax errors as warnings
- pep8 upgrade
- added max_line_length default value
- added Flake8Command and entry points is setuptools is around
- using the setuptools console wrapper when available
1.4 - 2012-07-12
----------------
- git_hook: Only check staged changes for compliance
- use pep8 1.2
1.3.1 - 2012-05-19
------------------
- fixed support for Python 2.5
1.3 - 2012-03-12
----------------
- fixed false W402 warning on exception blocks.
1.2 - 2012-02-12
----------------
- added a git hook
- now Python 3 compatible
- mccabe and pyflakes have warning codes like pep8 now
1.1 - 2012-02-14
----------------
- fixed the value returned by --version
- allow the flake8: header to be more generic
- fixed the "hg hook raises 'physical lines'" bug
- allow three argument form of raise
- now uses setuptools if available, for 'develop' command
1.0 - 2011-11-29
----------------
- Deactivates by default the complexity checker
- Introduces the complexity option in the HG hook and the command line.
0.9 - 2011-11-09
----------------
- update pep8 version to 0.6.1
- mccabe check: gracefully handle compile failure
0.8 - 2011-02-27
----------------
- fixed hg hook
- discard unexisting files on hook check
0.7 - 2010-02-18
----------------
- Fix pep8 initialization when run through Hg
- Make pep8 short options work when run through the command line
- Skip duplicates when controlling files via Hg
0.6 - 2010-02-15
----------------
- Fix the McCabe metric on some loops
Platform: UNKNOWN
Classifier: Environment :: Console
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Software Development :: Quality Assurance
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