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

feynmagi
0.1.28

This version was deleted from PyPI around 2024-07-26. Installing fails with:
$ pip3 install feynmagi==0.1.28 ERROR: Could not find a version that satisfies the requirement feynmagi==0.1.28
View other deleted versions of feynmagi

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/2024-07-25/ \ feynmagi==0.1.28
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Or, download files manually

And install manually via pip:
feynmagi-0.1.28-py3-none-any.whl (10.5MB)
feynmagi-0.1.28.tar.gz (10.1MB)