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

dlm-matrix
0.6.3

This version was deleted from PyPI around 2023-10-03. Installing fails with:
$ pip3 install dlm-matrix==0.6.3 ERROR: Could not find a version that satisfies the requirement dlm-matrix==0.6.3
View other deleted versions of dlm-matrix

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/2023-10-02/ \ dlm-matrix==0.6.3
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:
dlm_matrix-0.6.3-py3-none-any.whl (204.2KB)
dlm_matrix-0.6.3.tar.gz (164.5KB)