You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
bughunter9 was reported malicious
OSV:MAL-2024-9953 - Malicious code in bughunter9 (PyPI)

bughunter9
9.21

This version was deleted from PyPI around 2024-07-02. Installing fails with:
$ pip3 install bughunter9==9.21 ERROR: Could not find a version that satisfies the requirement bughunter9==9.21

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/2024-07-01/ \ bughunter9==9.21
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Or, download files manually

And install manually via pip: