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

evomsa
0.50

This version was deleted from PyPI around 2024-01-25. Installing fails with:
$ pip3 install evomsa==0.50 ERROR: Could not find a version that satisfies the requirement evomsa==0.50
View other deleted versions of evomsa

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/2024-01-24/ \ evomsa==0.50
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:
EvoMSA-0.50-cp35-cp35m-macosx_10_6_x86_64.whl (130.2KB)
EvoMSA-0.50-cp36-cp36m-macosx_10_7_x86_64.whl (137.3KB)
EvoMSA-0.50-cp37-cp37m-macosx_10_7_x86_64.whl (137.2KB)
EvoMSA-0.50.tar.gz (106.7KB)