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

tweety-ns
0.9.9.5

This version was deleted from PyPI around 2023-11-30. Installing fails with:
$ pip3 install tweety-ns==0.9.9.5 ERROR: Could not find a version that satisfies the requirement tweety-ns==0.9.9.5
View other deleted versions of tweety-ns

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/2023-11-29/ \ tweety-ns==0.9.9.5
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:
tweety_ns-0.9.9.5-py3-none-any.whl (51.4KB)
tweety-ns-0.9.9.5.tar.gz (44.5KB)