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

rateslib
0.5.1

This version was deleted from PyPI around 2025-06-20. Installing fails with:
$ pip3 install rateslib==0.5.1 ERROR: Could not find a version that satisfies the requirement rateslib==0.5.1
View other deleted versions of rateslib

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/2025-06-19/ \ rateslib==0.5.1
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:
rateslib-0.5.1-py3-none-any.whl (230.2KB)
rateslib-0.5.1.tar.gz (296.0KB)