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

TatSu
5.9.1

This version was deleted from PyPI around 2023-10-31. Installing fails with:
$ pip3 install TatSu==5.9.1 ERROR: Could not find a version that satisfies the requirement TatSu==5.9.1
View other deleted versions of TatSu

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/2023-10-30/ \ TatSu==5.9.1
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:
TatSu-5.9.1-py3-none-any.whl (98.7KB)
TatSu-5.9.1.tar.gz (139.5KB)