Get Python Matplotlib Radiobutton selection

Question

In Python, I can create Matplotlib Radiobuttons using code like this:

rb = RadioButtons(pl.axes([0.01,0.5,0.08,0.14]),('A','B','C',))

How do I get the index of the currently active radio button outside the callback function?

Dosh

Can you provide a minimal working example for people to test with? – Sofiasofie

use on_clicked to register a call back – Studley