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

proper
0.2

This version was deleted from PyPI around 2026-05-17. Installing fails with:
$ pip3 install proper==0.2 ERROR: Could not find a version that satisfies the requirement proper==0.2
View other deleted versions of proper

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/2026-05-16/ \ proper==0.2
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Or, download files manually

And install manually via pip:
proper-0.2-py3-none-any.whl (137.6KB)
proper-0.2.tar.gz (107.2KB)