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

pydnp3-stepfunc
1.6.0.3

This version was deleted from PyPI around 2026-02-07. Installing fails with:
$ pip3 install pydnp3-stepfunc==1.6.0.3 ERROR: Could not find a version that satisfies the requirement pydnp3-stepfunc==1.6.0.3

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/2026-02-06/ \ pydnp3-stepfunc==1.6.0.3
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)