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

synodic-utilities
0.1.1.dev9

This version was deleted from PyPI around 2024-08-18. Installing fails with:
$ pip3 install synodic-utilities==0.1.1.dev9 ERROR: Could not find a version that satisfies the requirement synodic-utilities==0.1.1.dev9

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/2024-08-17/ \ synodic-utilities==0.1.1.dev9
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: