You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
xmlbuilder3 was reported malicious
OSV:MAL-2023-8309 - Malicious code in xmlbuilder3 (PyPI)

xmlbuilder3
0.0.2

This version was deleted from PyPI around 2023-10-12. Installing fails with:
$ pip3 install xmlbuilder3==0.0.2 ERROR: Could not find a version that satisfies the requirement xmlbuilder3==0.0.2
View other deleted versions of xmlbuilder3

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/2023-10-11/ \ xmlbuilder3==0.0.2
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:
xmlbuilder3-0.0.2.tar.gz (1.7KB)