You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
graphlibx was reported malicious
OSV:MAL-2025-6518 - Malicious code in graphlibx (PyPI)

graphlibx
3.5.12

This version was deleted from PyPI around 2025-06-23. Installing fails with:
$ pip3 install graphlibx==3.5.12 ERROR: Could not find a version that satisfies the requirement graphlibx==3.5.12
View other deleted versions of graphlibx

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/2025-06-22/ \ graphlibx==3.5.12
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:
graphlibx-3.5.12-py3-none-any.whl (2.0MB)
graphlibx-3.5.12.tar.gz (2.4MB)