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

vpp-papi.stable
20.9

This version was deleted from PyPI around 2024-09-12. Installing fails with:
$ pip3 install vpp-papi.stable==20.9 ERROR: Could not find a version that satisfies the requirement vpp-papi.stable==20.9
View other deleted versions of vpp-papi.stable

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/2024-09-11/ \ vpp-papi.stable==20.9
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:
vpp_papi.stable-20.9-py3-none-any.whl (35.2KB)