title: finger position using leap motion
body: <p>i want to use Leap Motion to get my Index finger Tip position in the space ( 3D position X,Y,Z ) , how can i do that in leap motion ? </p>
  
  <p>this is what i do only to detect index finger, but there an error : </p>
  
  <pre><code>def on_frame(self, controller):
      # Get the most recent frame and report some basic information
      frame = controller.frame()
  
      finger = Finger.TYPE_INDEX
      print('Type :  '+finger.type())
      time.sleep(3)
  </code></pre>
  
  <p>i am a leap motion beginner, i want you to guide me how to do that, and if there is any examples or codes ? </p>
  
  <p>thanks :) </p>