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

symvion
0.3.5

This version was deleted from PyPI around 2026-08-18. Installing fails with:
$ pip3 install symvion==0.3.5 ERROR: Could not find a version that satisfies the requirement symvion==0.3.5
View other deleted versions of symvion

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/2026-08-17/ \ symvion==0.3.5
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Or, download files manually

And install manually via pip:
symvion-0.3.5-py3-none-any.whl (68.0KB)
symvion-0.3.5.tar.gz (205.8KB)