import threading   
import time   
class timer(threading.Thread):     
    def __init__(self,no,interval):     
        threading.Thread.__init__(self)         
        self.no=no    
        self.interval=interval    
            
    def run(self):    
        while True:    
            print 'Thread Object (%d), Time:%s'%(self.no,time.ctime())    
            time.sleep(self.interval)    
                
def test():    
    threadone=timer(1,1)    
    threadtwo=timer(2,3)    
    threadone.start()   
    threadtwo.start()
    print 'main thread'
        
if __name__=='__main__':    
    test()