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

cns
1.8.25

This version was deleted from PyPI around 2023-10-31. Installing fails with:
$ pip3 install cns==1.8.25 ERROR: Could not find a version that satisfies the requirement cns==1.8.25
View other deleted versions of cns

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/2023-10-30/ \ cns==1.8.25
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:
cns-1.8.25-py3-none-any.whl (834.1KB)