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

xarg-python
0.11b1

This version was deleted from PyPI around 2023-12-11. Installing fails with:
$ pip3 install xarg-python==0.11b1 ERROR: Could not find a version that satisfies the requirement xarg-python==0.11b1
View other deleted versions of xarg-python

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/2023-12-10/ \ xarg-python==0.11b1
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:
xarg_python-0.11b1-py2.py3-none-any.whl (11.4KB)
xarg-python-0.11b1.tar.gz (10.1KB)