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

colltools
1.0.1

This version was deleted from PyPI around 2023-12-09. Installing fails with:
$ pip3 install colltools==1.0.1 ERROR: Could not find a version that satisfies the requirement colltools==1.0.1
View other deleted versions of colltools

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/2023-12-08/ \ colltools==1.0.1
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:
colltools-1.0.1-py3-none-any.whl (3.6KB)
colltools-1.0.1.tar.gz (2.6KB)