Atomistic code for leap motion control with Python

leap_motion.py

#!/usr/bin/env python2.7
import sys
#sys.path.insert(0, "../lib") # utile pour avoir la lib en locale
import Leap

class MyListener(Leap.Listener):
    def __init__(self):
        super(MyListener, self).__init__()
        self.controller = Leap.Controller()
        self.controller.add_listener(self)

    def find_direction(self, position):
        if position.x > 90: # right
            return 'right'
        elif position.x < -90: # left
            return 'left'
        elif position.z < -90: # forward
            return 'forward'
        elif position.z > 90: # backward
            return 'backward'
        else:
            return 'undefined' # undefined

    def on_connect(self, controller):
        print 'Connected'

    def on_frame(self, controller):
        frame = controller.frame()
        fingers = frame.fingers.extended()
        hand = frame.hands[0]
        if hand.is_valid and len(fingers) == 5:
            direction = self.find_direction(hand.palm_position)
            print str(direction)

    def __del__(self):
        self.controller.remove_listener(self)
        super(MyListener, self).__del__()

def main():
    listener = MyListener()

    # Keep this process running until Enter is pressed
    print "Press Enter to quit..."
    try:
        sys.stdin.readline()
    except KeyboardInterrupt:
        pass
    finally:
        print 'bye'

if __name__ == "__main__":
    main()