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

polars
1.35.0b1

This version was deleted from PyPI around 2026-09-18. Installing fails with:
$ pip3 install polars==1.35.0b1 ERROR: Could not find a version that satisfies the requirement polars==1.35.0b1
View other deleted versions of polars

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/2026-09-17/ \ polars==1.35.0b1
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Or, download files manually

And install manually via pip:
polars-1.35.0b1-py3-none-any.whl (762.3KB)
polars-1.35.0b1.tar.gz (675.8KB)