Matplotlib supports event handling with a GUI neutral event model, so

you can connect to Matplotlib events without knowledge of what user

interface Matplotlib will ultimately be plugged in to. This has two

advantages: the code you write will be more portable, and Matplotlib

events are aware of things like data coordinate space and which axes

the event occurs in so you don't have to mess with low level

transformation details to go from canvas space to data space. Object

picking examples are also included.