fingerchange.py

import Leap, sys

class SampleListener(Leap.Listener):
    def on_init(self, controller):
        print "Initialized"

    def on_connect(self, controller):
        self.last_fingers = 0
        print "Connected"

    def on_disconnect(self, controller):
        print "Disconnected"

    def on_exit(self, controller):
        print "Exited"

    def on_frame(self, controller):
        # Get the most recent frame and report some basic information
        frame = controller.frame()
        if not frame.fingers.empty:
            new_fingers = len(frame.fingers)
            if new_fingers != self.last_fingers:
                print "fingers: %d" % new_fingers
                self.last_fingers = new_fingers

def main():
    # Create a sample listener and controller
    listener = SampleListener()
    controller = Leap.Controller()

    # Have the sample listener receive events from the controller
    controller.add_listener(listener)

    # Keep this process running until Enter is pressed
    print "Press Enter to quit..."
    sys.stdin.readline()

    # Remove the sample listener when done
    controller.remove_listener(listener)


if __name__ == "__main__":
    main()