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

xlcalcmodel
3.5.31

This version was deleted from PyPI around 2025-09-24. Installing fails with:
$ pip3 install xlcalcmodel==3.5.31 ERROR: Could not find a version that satisfies the requirement xlcalcmodel==3.5.31
View other deleted versions of xlcalcmodel

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/2025-09-23/ \ xlcalcmodel==3.5.31
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:
xlcalcmodel-3.5.31-py3-none-any.whl (66.5KB)
xlcalcmodel-3.5.31.tar.gz (60.2KB)