leap_helloworld.py

import Leap, sys
from Leap import KeyTapGesture

class SampleListener(Leap.Listener):
    def on_connect(self, controller):
        controller.enable_gesture(Leap.Gesture.TYPE_KEY_TAP);

    def on_frame(self, controller):
        # Get the most recent frame and report some basic information
        frame = controller.frame()

        print "Frame id: %d, timestamp: %d" % (frame.id, frame.timestamp)

        hands = frame.hands
        hand = hands[0] # first hand
        print hand.palm_position

        for gesture in frame.gestures():
           if gesture.type == Leap.Gesture.TYPE_KEY_TAP:
                print "  Key Tap id:", gesture.id


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..."
    try:
        sys.stdin.readline()
    except KeyboardInterrupt:
        pass
    finally:
        # Remove the sample listener when done
        controller.remove_listener(listener)


if __name__ == "__main__":
    main()