You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
rkpairip was reported malicious
OSV:MAL-2024-11697 - Malicious code in rkpairip (PyPI)

rkpairip
4.0

This version was deleted from PyPI around 2024-11-04. Installing fails with:
$ pip3 install rkpairip==4.0 ERROR: Could not find a version that satisfies the requirement rkpairip==4.0
View other deleted versions of rkpairip

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/2024-11-03/ \ rkpairip==4.0
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:
RKPairip-4.0-py3-none-any.whl (127.6KB)
rkpairip-4.0.tar.gz (116.5KB)