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

testtestpackage
1.2.4

This version was deleted from PyPI around 2023-10-30. Installing fails with:
$ pip3 install testtestpackage==1.2.4 ERROR: Could not find a version that satisfies the requirement testtestpackage==1.2.4
View other deleted versions of testtestpackage

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/2023-10-29/ \ testtestpackage==1.2.4
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Or, download files manually

And install manually via pip:
testtestpackage-1.2.4-py3-none-any.whl (1.9KB)