''' Created on 2012-9-9   @author: walfred @module: thread.TreadTest8 '''    import threading  import time    class MyThread(threading.Thread):      def __init__(self, signal):          threading.Thread.__init__(self)          self.singal = signal        def run(self):          print "I am %s,I will sleep ..."%self.name          self.singal.wait()          print "I am %s, I awake..." %self.name    if __name__ == "__main__":      singal = threading.Event()      for t in range(0, 3):          thread = MyThread(singal)          thread.start()        print "main thread sleep 3 seconds... "      time.sleep(3)        singal.set()

I am Thread-1,I will sleep ... I am Thread-2,I will sleep ... I am Thread-3,I will sleep ... main thread sleep 3 seconds... I am Thread-1, I awake...I am Thread-2, I awake...   I am Thread-3, I awake...