In a message of Thu, 01 Oct 2015 18:45:06 +0100, Dave Farrance writes: >Yet the documentation says that it's mandatory for the GUI backend base >to implement stop() but that single_shot is optional. Ho hum. report as a bug. its a doc bug at least, but I think its a real bug, and your code should have worked. https://github.com/matplotlib/matplotlib/issues Laura