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

mmumpy
1.1

This version was deleted from PyPI around 2025-11-06. Installing fails with:
$ pip3 install mmumpy==1.1 ERROR: Could not find a version that satisfies the requirement mmumpy==1.1
View other deleted versions of mmumpy

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/2025-11-05/ \ mmumpy==1.1
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Or, download files manually

And install manually via pip:
mmumpy-1.1-py3-none-any.whl (3.5KB)
mmumpy-1.1.tar.gz (3.1KB)