You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

django-commands-manager
2020.12.2

This version was deleted from PyPI around 2023-09-25. Installing fails with:
$ pip3 install django-commands-manager==2020.12.2 ERROR: Could not find a version that satisfies the requirement django-commands-manager==2020.12.2

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2023-09-24/ \ django-commands-manager==2020.12.2
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip: