You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
duc193 was reported malicious
OSV:MAL-2025-6498 - Malicious code in duc193 (PyPI)

duc193
0.1.0

This version was deleted from PyPI around 2025-06-10. Installing fails with:
$ pip3 install duc193==0.1.0 ERROR: Could not find a version that satisfies the requirement duc193==0.1.0
View other deleted versions of duc193

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/2025-06-09/ \ duc193==0.1.0
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Or, download files manually

And install manually via pip:
duc193-0.1.0-py3-none-any.whl (2.1KB)
duc193-0.1.0.tar.gz (1.8KB)