(self, event, callback)
Unregisters a event handler.
Unregisters a event handler.
Unregisters a event handler .
def unregister_event(self, event, callback):
        """Unregisters a event handler."""
        self.event_callbacks[event].remove(callback)
def unregister_event ( self , event , callback ) : self . event_callbacks [ event ] . remove ( callback )