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opencv-python-rpi3

This package was deleted from PyPI around 2025-05-06. Installing fails with:
$ pip3 install opencv-python-rpi3 ERROR: Could not find a version that satisfies the requirement opencv-python-rpi3 (from versions: none) ERROR: No matching distribution found for opencv-python-rpi3

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/2025-05-05/ \ opencv-python-rpi3
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Or, download files manually

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66.0.0
66.0.2
66.0.3