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

dnbc4dev
2.1.3

This version was deleted from PyPI around 2024-06-28. Installing fails with:
$ pip3 install dnbc4dev==2.1.3 ERROR: Could not find a version that satisfies the requirement dnbc4dev==2.1.3
View other deleted versions of dnbc4dev

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/2024-06-27/ \ dnbc4dev==2.1.3
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:
DNBC4dev-2.1.3-py3-none-any.whl (28.2MB)
DNBC4dev-2.1.3.tar.gz (27.4MB)