TIL there are dozens of neat little command-line tools hidden away in the Python standard library, available to run on any machine that has a Python installation https://til.simonwillison.net/python/stdlib-cli-tools
CLI tools hidden in the Python standard library

Seth Michael Larson pointed out that the Python gzip module can be used as a CLI tool like this:

@simon I saw tabnanny and, as a browser tab addict, I had to know more.

Turns out it's a tabs vs spaces indent specific linter. Still cool though!

https://docs.python.org/3.11/library/tabnanny.html

tabnanny — Detection of ambiguous indentation

Source code: Lib/tabnanny.py For the time being this module is intended to be called as a script. However it is possible to import it into an IDE and use the function check() described below.

Python documentation