quspin-extensions
0.1.2
This version was deleted from PyPI around 2024-10-09. Installing fails with:
$ pip3 install quspin-extensions==0.1.2
ERROR: Could not find a version that satisfies the requirement quspin-extensions==0.1.2

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/2024-10-08/ \
quspin-extensions==0.1.2
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)