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