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

twinfield
2.1.0rc3

This version was deleted from PyPI around 2024-08-23. Installing fails with:
$ pip3 install twinfield==2.1.0rc3 ERROR: Could not find a version that satisfies the requirement twinfield==2.1.0rc3
View other deleted versions of twinfield

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/2024-08-22/ \ twinfield==2.1.0rc3
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:
twinfield-2.1.0rc3-py3-none-any.whl (21.0KB)
twinfield-2.1.0rc3.tar.gz (17.5KB)