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

sttk
0.2.1

This version was deleted from PyPI around 2025-05-29. Installing fails with:
$ pip3 install sttk==0.2.1 ERROR: Could not find a version that satisfies the requirement sttk==0.2.1
View other deleted versions of sttk

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/2025-05-28/ \ sttk==0.2.1
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:
sttk-0.2.1-py3-none-any.whl (21.7KB)
sttk-0.2.1.tar.gz (19.8KB)