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

markdown-spa

This package was deleted from PyPI around 2023-12-21. Installing fails with:
$ pip3 install markdown-spa ERROR: Could not find a version that satisfies the requirement markdown-spa (from versions: none) ERROR: No matching distribution found for markdown-spa

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/2023-12-20/ \ markdown-spa
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)