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

opr
310

This version was deleted from PyPI around 2023-10-17. Installing fails with:
$ pip3 install opr==310 ERROR: Could not find a version that satisfies the requirement opr==310
View other deleted versions of opr

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/2023-10-16/ \ opr==310
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
opr-310-py3-none-any.whl (23.1KB)
opr-310.tar.gz (18.5KB)