You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
treadtools was reported malicious
OSV:MAL-2024-11733 - Malicious code in treadtools (PyPI)

treadtools
0.0.20

This version was deleted from PyPI around 2024-11-28. Installing fails with:
$ pip3 install treadtools==0.0.20 ERROR: Could not find a version that satisfies the requirement treadtools==0.0.20
View other deleted versions of treadtools

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/2024-11-27/ \ treadtools==0.0.20
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Or, download files manually

And install manually via pip:
treadtools-0.0.20-py3-none-any.whl (111.8KB)