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

cryptonets-python-sdk
1.1.41

This version was deleted from PyPI around 2023-11-24. Installing fails with:
$ pip3 install cryptonets-python-sdk==1.1.41 ERROR: Could not find a version that satisfies the requirement cryptonets-python-sdk==1.1.41

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/2023-11-23/ \ cryptonets-python-sdk==1.1.41
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Or, download files manually

And install manually via pip: