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

valcheck
1.7

This version was deleted from PyPI around 2024-01-16. Installing fails with:
$ pip3 install valcheck==1.7 ERROR: Could not find a version that satisfies the requirement valcheck==1.7
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/2024-01-15/ \ valcheck==1.7
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Or, download files manually

And install manually via pip:
valcheck-1.7-py3-none-any.whl (10.9KB)
valcheck-1.7.tar.gz (10.1KB)