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

bandgap-ml
1.3

This version was deleted from PyPI around 2025-03-18. Installing fails with:
$ pip3 install bandgap-ml==1.3 ERROR: Could not find a version that satisfies the requirement bandgap-ml==1.3
View other deleted versions of bandgap-ml

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/2025-03-17/ \ bandgap-ml==1.3
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Or, download files manually

And install manually via pip:
bandgap_ml-1.3-py3-none-any.whl (2.0MB)
bandgap_ml-1.3.tar.gz (1.9MB)