Fix unit tests that generate multiple warnings by murrayrm · Pull Request #986 · python-control/python-control
In preparing for the v0.10.0 release, I found a few more warnings that were not getting trapped properly. The issue was that you get multiple warnings from a single call, you need to test them separately. This wasn't showing up in local testing, but showed up under the GitHub action runs. So figured it was best to clean them up.
I also ran isort on files that I updated to get some consistency in import statements at the top of files (I've been doing that as I make changes).