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

testplans
0.0.16

This version was deleted from PyPI around 2024-03-28. Installing fails with:
$ pip3 install testplans==0.0.16 ERROR: Could not find a version that satisfies the requirement testplans==0.0.16
View other deleted versions of testplans

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/2024-03-27/ \ testplans==0.0.16
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Or, download files manually

And install manually via pip:
testplans-0.0.16-py3-none-any.whl (14.3KB)
testplans-0.0.16.tar.gz (14.2KB)