You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
azureml-contrib-daskonbatch was reported malicious
OSV:MAL-2023-8563 - Malicious code in azureml-contrib-daskonbatch (PyPI)

azureml-contrib-daskonbatch
0.1.0

This version was deleted from PyPI around 2023-11-22. Installing fails with:
$ pip3 install azureml-contrib-daskonbatch==0.1.0 ERROR: Could not find a version that satisfies the requirement azureml-contrib-daskonbatch==0.1.0

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/2023-11-21/ \ azureml-contrib-daskonbatch==0.1.0
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Or, download files manually

And install manually via pip: