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

core-framework
0.17.20

This version was deleted from PyPI around 2026-02-11. Installing fails with:
$ pip3 install core-framework==0.17.20 ERROR: Could not find a version that satisfies the requirement core-framework==0.17.20
View other deleted versions of core-framework

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/2026-02-10/ \ core-framework==0.17.20
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Or, download files manually

And install manually via pip:
core_framework-0.17.20-py3-none-any.whl (469.9KB)
core_framework-0.17.20.tar.gz (598.8KB)