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

xython
1.13.0

This version was deleted from PyPI around 2024-09-19. Installing fails with:
$ pip3 install xython==1.13.0 ERROR: Could not find a version that satisfies the requirement xython==1.13.0
View other deleted versions of xython

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/2024-09-18/ \ xython==1.13.0
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Or, download files manually

And install manually via pip:
xython-1.13.0-py3-none-any.whl (167.2KB)
xython-1.13.0.tar.gz (166.7KB)