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

graphscope-flex
0.28.0a20240731

This version was deleted from PyPI around 2024-09-18. Installing fails with:
$ pip3 install graphscope-flex==0.28.0a20240731 ERROR: Could not find a version that satisfies the requirement graphscope-flex==0.28.0a20240731

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/2024-09-17/ \ graphscope-flex==0.28.0a20240731
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: