Check Python files in a directory recursively

Checks Python source code files for errors.
More information: <https://pypi.org/project/pyflakes>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

pyflakes checkRecursive {{path/to/directory}}

click the source code to copy install pyflakes on any operating system with command-not-found.com