Pyflakes

Pyflakes is a program designed to analyze Python source files for errors by parsing the code rather than importing it, making it safe to use on modules with side effects. It focuses on detecting various errors while avoiding stylistic complaints and false positives. Pyflakes is compatible with Python versions 3.9 and above and can be installed via pip. For users seeking additional stylistic checks, Flake8 is recommended as it combines Pyflakes with style checks.