Extracting palm position with Python (only zeros!)

[yodihs]

hello Leap community,

I was trying to extract the palm position with the API using Python, but I could only get arrays of zeros. I have tried many things but with no success

Here is a snippet of my code

        frame = controller.frame()            #get palm positions and save them
        hand = frame.hands[0]        
        coordinates = hand.palm_position
        print(coordinates) # controller is a Leap.Controller object

Any help is appreciated!

Thanks