Got problem intalling pynumpress

[Larz60+]

try just: pip install pynumpress without python -m

This package does not have a GitHub repository (or at least not specified in the PyPi entry), therefore it's anyone's guess as to how to install.

Personally, that would be enough for me not to attempt installation.

If suggestion at top does not work for you, I would suggest contacting the authors, who's email address can be had here: https://pypi.org/project/pynumpress/#description