You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
rhermann-ct was reported malicious
OSV:MAL-2024-5944 - Malicious code in rhermann-ct (PyPI)

rhermann-ct
99.0

This version was deleted from PyPI around 2024-04-17. Installing fails with:
$ pip3 install rhermann-ct==99.0 ERROR: Could not find a version that satisfies the requirement rhermann-ct==99.0
View other deleted versions of rhermann-ct

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/2024-04-16/ \ rhermann-ct==99.0
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Or, download files manually

And install manually via pip:
rhermann-ct-99.0.tar.gz (4.6KB)