You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

omegatomo
2.1.0rc4

This version was deleted from PyPI around 2025-07-21. Installing fails with:
$ pip3 install omegatomo==2.1.0rc4 ERROR: Could not find a version that satisfies the requirement omegatomo==2.1.0rc4
View other deleted versions of omegatomo

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/2025-07-20/ \ omegatomo==2.1.0rc4
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:
omegatomo-2.1.0rc4-py3-none-any.whl (3.6MB)
omegatomo-2.1.0rc4.tar.gz (3.6MB)