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

cp-core
0.3.4

This version was deleted from PyPI around 2026-07-02. Installing fails with:
$ pip3 install cp-core==0.3.4 ERROR: Could not find a version that satisfies the requirement cp-core==0.3.4
View other deleted versions of cp-core

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/2026-07-01/ \ cp-core==0.3.4
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Or, download files manually

And install manually via pip:
cp_core-0.3.4-py3-none-any.whl (101.6KB)
cp_core-0.3.4.tar.gz (61.0KB)