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

hartree-fock
3.2.1

This version was deleted from PyPI around 2024-03-21. Installing fails with:
$ pip3 install hartree-fock==3.2.1 ERROR: Could not find a version that satisfies the requirement hartree-fock==3.2.1
View other deleted versions of hartree-fock

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/2024-03-20/ \ hartree-fock==3.2.1
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Or, download files manually

And install manually via pip:
hartree_fock-3.2.1-py3-none-any.whl (26.0KB)
hartree_fock-3.2.1.tar.gz (21.5KB)