Hello there, long time no see !
Being back on developing mopidy extensions, I just published an extension that help doing so, by providing a “Read-Eval” loop, so that one can execute python code on demand, without needing to restart the mopidy server.
See the repo for more info: GitHub - sapristi/mopidy-debugrel: Mopidy debugging Read-Eval-Loop extension
Note that having the extension enabled is exactly the kind of thing that can be exploited, so use with care (i.e. do not enable on an instance exposed to the web, and disable as soon as possible).
Interested by other ideas, are there other ways to do this ?