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

sift-core
1.0.0

This version was deleted from PyPI around 2026-06-10. Installing fails with:
$ pip3 install sift-core==1.0.0 ERROR: Could not find a version that satisfies the requirement sift-core==1.0.0
View other deleted versions of sift-core

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/2026-06-09/ \ sift-core==1.0.0
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:
sift_core-1.0.0-py3-none-any.whl (4.4KB)
sift_core-1.0.0.tar.gz (5.0KB)