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

atlas
0.25.3

This version was deleted from PyPI around 2024-08-09. Installing fails with:
$ pip3 install atlas==0.25.3 ERROR: Could not find a version that satisfies the requirement atlas==0.25.3
View other deleted versions of atlas

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/2024-08-08/ \ atlas==0.25.3
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:
atlas-0.25.3-py2.4.egg (44.0KB)
atlas-0.25.3-py2.5.egg (45.9KB)
atlas-0.25.3.tar.gz (9.5KB)