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

BetterPyXZH
1.1.0.20201231.1

This version was deleted from PyPI around 2023-10-24. Installing fails with:
$ pip3 install BetterPyXZH==1.1.0.20201231.1 ERROR: Could not find a version that satisfies the requirement BetterPyXZH==1.1.0.20201231.1
View other deleted versions of BetterPyXZH

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/2023-10-23/ \ BetterPyXZH==1.1.0.20201231.1
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
BetterPyXZH-1.1.0.20201231.1.tar.gz (1.8KB)