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

pytzen
0.0.143

This version was deleted from PyPI around 2023-09-25. Installing fails with:
$ pip3 install pytzen==0.0.143 ERROR: Could not find a version that satisfies the requirement pytzen==0.0.143
View other deleted versions of pytzen

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/2023-09-24/ \ pytzen==0.0.143
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Or, download files manually

And install manually via pip:
pytzen-0.0.143-py3-none-any.whl (7.9KB)
pytzen-0.0.143.tar.gz (8.7KB)