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

pyside2-material-widgets
0.9.10

This version was deleted from PyPI around 2024-01-23. Installing fails with:
$ pip3 install pyside2-material-widgets==0.9.10 ERROR: Could not find a version that satisfies the requirement pyside2-material-widgets==0.9.10
View other deleted versions of pyside2-material-widgets

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/2024-01-22/ \ pyside2-material-widgets==0.9.10
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Or, download files manually

And install manually via pip:
PySide2_Material_Widgets-0.9.10-py3-none-any.whl (1,007.7KB)
PySide2-Material-Widgets-0.9.10.tar.gz (937.6KB)