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

valcheck
5.0

This version was deleted from PyPI around 2024-10-27. Installing fails with:
$ pip3 install valcheck==5.0 ERROR: Could not find a version that satisfies the requirement valcheck==5.0
View other deleted versions of valcheck

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/2024-10-26/ \ valcheck==5.0
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Or, download files manually

And install manually via pip:
valcheck-5.0-py3-none-any.whl (34.1KB)
valcheck-5.0.tar.gz (29.2KB)