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McCabe checker, plugin for flake8

Project description

Ned’s script to check McCabe complexity.

This module provides a plugin for flake8, the Python code checker.

Installation

You can install, upgrade, uninstall mccabe with these commands:

$ pip install mccabe
$ pip install --upgrade mccabe
$ pip uninstall mccabe

Standalone script

The complexity checker can be used directly:

$ python -m mccabe --min 5 mccabe.py
("185:1: 'PathGraphingAstVisitor.visitIf'", 5)
("71:1: 'PathGraph.to_dot'", 5)
("245:1: 'McCabeChecker.run'", 5)
("283:1: 'main'", 7)
("203:1: 'PathGraphingAstVisitor.visitTryExcept'", 5)
("257:1: 'get_code_complexity'", 5)

Plugin for Flake8

When both flake8 2.0 and mccabe are installed, the plugin is available in flake8:

$ flake8 --version
2.0 (pep8: 1.4.2, pyflakes: 0.6.1, mccabe: 0.2)

By default the plugin is disabled. Use the --max-complexity switch to enable it. It will emit a warning if the McCabe complexity of a function is higher that the value:

$ flake8 --max-complexity 10 coolproject
...
coolproject/mod.py:1204:1: C901 'CoolFactory.prepare' 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.

Changes

0.2.1 - 2013-04-03

  • Do not require setuptools in setup.py. It works around an issue with pip and Python 3.

0.2 - 2013-02-22

  • Rename project flint-mccabe to mccabe.
  • Provide flake8.extension setuptools entry point.
  • Read max-complexity from the configuration file.
  • Rename argument min_complexity to threshold.

0.1 - 2013-02-11

  • First release

Project details


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Filename, size & hash SHA256 hash help File type Python version Upload date
mccabe-0.2.1.tar.gz (5.0 kB) Copy SHA256 hash SHA256 Source None Apr 3, 2013

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