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

ullrpalib
2023.2.23

This version was deleted from PyPI around 2023-12-20. Installing fails with:
$ pip3 install ullrpalib==2023.2.23 ERROR: Could not find a version that satisfies the requirement ullrpalib==2023.2.23
View other deleted versions of ullrpalib

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/2023-12-19/ \ ullrpalib==2023.2.23
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:
ULLRPALIB-2023.2.23-py3-none-any.whl (10.5KB)
ULLRPALIB-2023.2.23.tar.gz (10.6KB)