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

gamspy
1.3.0

This version was deleted from PyPI around 2025-10-07. Installing fails with:
$ pip3 install gamspy==1.3.0 ERROR: Could not find a version that satisfies the requirement gamspy==1.3.0
View other deleted versions of gamspy

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/2025-10-06/ \ gamspy==1.3.0
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:
gamspy-1.3.0-py3-none-any.whl (144.6KB)
gamspy-1.3.0.tar.gz (114.4KB)