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

vectormpp
0.2.3

This version was deleted from PyPI around 2024-06-07. Installing fails with:
$ pip3 install vectormpp==0.2.3 ERROR: Could not find a version that satisfies the requirement vectormpp==0.2.3
View other deleted versions of vectormpp

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/2024-06-06/ \ vectormpp==0.2.3
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Or, download files manually

And install manually via pip:
vectormpp-0.2.3-py3-none-any.whl (12.6KB)
vectormpp-0.2.3.tar.gz (11.9KB)