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

axion
3.8.1

This version was deleted from PyPI around 2023-10-16. Installing fails with:
$ pip3 install axion==3.8.1 ERROR: Could not find a version that satisfies the requirement axion==3.8.1
View other deleted versions of axion

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/2023-10-15/ \ axion==3.8.1
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:
axion-3.8.1-cp310-none-manylinux1_x86_64.whl (3.7MB)
axion-3.8.1-cp310-none-win_amd64.whl (641.1KB)
axion-3.8.1-cp311-none-manylinux1_x86_64.whl (4.0MB)
axion-3.8.1-cp311-none-win_amd64.whl (647.1KB)