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

basepair
2.0.12a1

This version was deleted from PyPI around 2024-02-12. Installing fails with:
$ pip3 install basepair==2.0.12a1 ERROR: Could not find a version that satisfies the requirement basepair==2.0.12a1
View other deleted versions of basepair

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/2024-02-11/ \ basepair==2.0.12a1
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:
basepair-2.0.12a1-py3-none-any.whl (68.6KB)
basepair-2.0.12a1.tar.gz (47.7KB)