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

callguard
0.3.99

This version was deleted from PyPI around 2026-07-22. Installing fails with:
$ pip3 install callguard==0.3.99 ERROR: Could not find a version that satisfies the requirement callguard==0.3.99
View other deleted versions of callguard

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/2026-07-21/ \ callguard==0.3.99
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:
callguard-0.3.99-py3-none-any.whl (1.4KB)
callguard-0.3.99.tar.gz (0.9KB)