To save clicks: it’s a Python command line argument parsing library. Looks kinda nice at a glance if you’re into Python. Ruby fans might check out Trollop instead.

Reminds me of Typer - from the creator of FastAPI:

https://typer.tiangolo.com/

My fav python cli tool is Fire. No need to even decorate your functions. There may be some limitations compared to Piou, I will have to explore that to find out.

https://github.com/google/python-fire

Looks a little bit like picocli.