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

zsl
1.3.1

This version was deleted from PyPI around 2024-09-02. Installing fails with:
$ pip3 install zsl==1.3.1 ERROR: Could not find a version that satisfies the requirement zsl==1.3.1
View other deleted versions of zsl

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/2024-09-01/ \ zsl==1.3.1
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:
zsl-1.3.1-py2.py3-none-any.whl (122.0KB)
zsl-1.3.1.tar.gz (118.2KB)