curses -- getxy() error

[shablool]

Hi,
Could someone please explain why stdscr.getxy() always raise an
exception:

import curses
import traceback

def init(stdscr):
    x = y = 0
    while 1:
        c = stdscr.getch()
        if c == ord('q'):
            break
        stdscr.addch(c)
        (x, y) = stdscr.getxy()
        stdscr.refresh()

def main():
    try:
        curses.wrapper(init)
    except Exception, e:
        traceback.print_exc()
       
if __name__ == "__main__":
    main()