You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
memlib was reported malicious
OSV:MAL-2025-6547 - Malicious code in memlib (PyPI)

memlib

This package was deleted from PyPI around 2025-07-18. Installing fails with:
$ pip3 install memlib ERROR: Could not find a version that satisfies the requirement memlib (from versions: none) ERROR: No matching distribution found for memlib

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/2025-07-17/ \ memlib
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

Choose a version to see all deleted wheels and files. We only show versions that have been deleted on PyPI.