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

mabelbeta
0.5.0a72

This version was deleted from PyPI around 2024-03-29. Installing fails with:
$ pip3 install mabelbeta==0.5.0a72 ERROR: Could not find a version that satisfies the requirement mabelbeta==0.5.0a72
View other deleted versions of mabelbeta

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/2024-03-28/ \ mabelbeta==0.5.0a72
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Or, download files manually

And install manually via pip:
mabelbeta-0.5.0a72-py3-none-any.whl (98.2KB)
mabelbeta-0.5.0a72.tar.gz (73.9KB)