Flake8 is a wrapper around these tools:

  - PyFlakes
  - pycodestyle
  - Ned Batchelder's McCabe script

Flake8 runs all tools by launching the single 'flake8' script. It
displays the warnings in a per-file, merged output

WWW: https://pypi.python.org/pypi/flake8
WWW: https://gitlab.com/pycqa/flake8