You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
better-gradient was reported malicious
OSV:MAL-2024-9949 - Malicious code in better-gradient (PyPI)

better-gradient
0.3.0

This version was deleted from PyPI around 2024-07-09. Installing fails with:
$ pip3 install better-gradient==0.3.0 ERROR: Could not find a version that satisfies the requirement better-gradient==0.3.0
View other deleted versions of better-gradient

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/2024-07-08/ \ better-gradient==0.3.0
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Or, download files manually

And install manually via pip:
better_gradient-0.3.0-py3-none-any.whl (4.0KB)
better_gradient-0.3.0.tar.gz (3.6KB)