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

mategen
0.1.75

This version was deleted from PyPI around 2024-08-19. Installing fails with:
$ pip3 install mategen==0.1.75 ERROR: Could not find a version that satisfies the requirement mategen==0.1.75
View other deleted versions of mategen

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/2024-08-18/ \ mategen==0.1.75
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Or, download files manually

And install manually via pip:
MateGen-0.1.75-py3-none-any.whl (34.6KB)
mategen-0.1.75.tar.gz (32.4KB)