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

rocketpyalpha
0.9.3

This version was deleted from PyPI around 2023-11-28. Installing fails with:
$ pip3 install rocketpyalpha==0.9.3 ERROR: Could not find a version that satisfies the requirement rocketpyalpha==0.9.3
View other deleted versions of rocketpyalpha

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/2023-11-27/ \ rocketpyalpha==0.9.3
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Or, download files manually

And install manually via pip:
rocketpyalpha-0.9.3-py3-none-any.whl (136.3KB)
rocketpyalpha-0.9.3-py3.6.egg (287.5KB)
rocketpyalpha-0.9.3-py3.8.egg (288.8KB)
rocketpyalpha-0.9.3.tar.gz (70.9KB)