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

rolypoly-bio
0.6.16

This version was deleted from PyPI around 2025-07-10. Installing fails with:
$ pip3 install rolypoly-bio==0.6.16 ERROR: Could not find a version that satisfies the requirement rolypoly-bio==0.6.16
View other deleted versions of rolypoly-bio

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/2025-07-09/ \ rolypoly-bio==0.6.16
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Or, download files manually

And install manually via pip:
rolypoly_bio-0.6.16-py3-none-any.whl (165.6KB)
rolypoly_bio-0.6.16.tar.gz (147.5KB)