You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
unicore was reported malicious
OSV:MAL-2025-191916 - Malicious code in unicore (PyPI)

unicore

This package was deleted from PyPI around 2025-01-16. Installing fails with:
$ pip3 install unicore ERROR: Could not find a version that satisfies the requirement unicore (from versions: none) ERROR: No matching distribution found for unicore

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pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2025-01-15/ \ unicore
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Or, download files manually

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1.0.0
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2.0.0