1 import threading 2 import time 3  4  5 class CountDownTimer(threading.Thread): 6         def __init__(self, seconds, action): 7             self.runTime = seconds 8             self.action = action 9             super(CountDownTimer, self).__init__()10 11         def run(self):12             counter = self.runTime13             for sec in range(self.runTime):14                     print counter15                     time.sleep(1.0)16                     counter -= 117             print " Time's up"18             self.action()19 20 21 def dosomethine():22     print "I'm ready"23 24     t = CountDownTimer(5, dosomethine)25     t.start()26 if __name__ == "__main__":27 28     t = CountDownTimer(5, dosomethine)29     t.start()