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

py-mdr
0.4.2

This version was deleted from PyPI around 2025-09-11. Installing fails with:
$ pip3 install py-mdr==0.4.2 ERROR: Could not find a version that satisfies the requirement py-mdr==0.4.2
View other deleted versions of py-mdr

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/2025-09-10/ \ py-mdr==0.4.2
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:
py_mdr-0.4.2-py3-none-any.whl (78.6KB)
py_mdr-0.4.2.tar.gz (48.4KB)