def sigint_handler(signal, frame):
    try:
        Exit = (str(raw_input("Break ? Y/N")))
        if Exit == "Y" or Exit=="y":
            raise KeyboardInterrupt()
    except KeyboardInterrupt:
        raise KeyboardInterrupt()
    except Exception as e:
        pass

signal.signal(signal.SIGINT,sigint_handler)
i=0

while i<1000:
    i=i+1
    print "%dn"%i
    sleep(0.5)