You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
memtools was reported malicious
OSV:MAL-2025-6549 - Malicious code in memtools (PyPI)

memtools
2.0.0

This version was deleted from PyPI around 2025-07-18. Installing fails with:
$ pip3 install memtools==2.0.0 ERROR: Could not find a version that satisfies the requirement memtools==2.0.0
View other deleted versions of memtools

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/ \ memtools==2.0.0
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:
memtools-2.0.0.tar.gz (1.6KB)