MNT: Deprecate rcParams._get("backend") by timhoffm · Pull Request #30963 · matplotlib/matplotlib

timhoffm

since 3.10 we have the official API matplotlib.get_backend (auto_select=False). No problems have been reported and matplotlib-inline is using it. Therefore, I remove the provisional status from the auto-select flag.

Additionally, I deprecate the API rcParams._get('backend'), which the above is replacing.

It seems that rcParams._get("backend") is not used anywhere publically, but let's still be defensive and deprecate.

https://github.com/search?q=%2F%5C._get%5C%28%5B%22%27%5Dbackend%5B%22%27%5D%5C%29%2F+language%3APython+NOT+is%3Afork+NOT+path%3A**%2Fmatplotlib%2F**+NOT+path%3A**%2Fsite-packages**+NOT+path%3A**%2Fpyplot.py&type=code

This is working towards removal of dynamic backend state from rcParams #26406.
Follow-up to #29039.