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

syntaxmatrix
1.5.4

This version was deleted from PyPI around 2025-03-02. Installing fails with:
$ pip3 install syntaxmatrix==1.5.4 ERROR: Could not find a version that satisfies the requirement syntaxmatrix==1.5.4
View other deleted versions of syntaxmatrix

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/2025-03-01/ \ syntaxmatrix==1.5.4
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:
SyntaxMatrix-1.5.4-py3-none-any.whl (10.4KB)
syntaxmatrix-1.5.4.tar.gz (10.0KB)