Flake8 is a wrapper around these tools:

    - PyFlakes
    - pep8
    - Ned's McCabe script

Flake8 runs all tools by launching the single 'flake8' script, but ignores pep8
and PyFlakes extended options and just uses defaults. It displays the warnings
in a per-file, merged output.

WWW: https://bitbucket.org/tarek/flake8