python中通过类的方式创建线程

 1 import threading
 2 import time
 3 
 4 class MyThread(threading.Thread):
 5     def __init__(self,num):
 6         threading.Thread.__init__(self)
 7         self.num=num
 8     def run(self):# 定义每个线程要运行的函数
 9         print("running on number:%s"% self.num)
10         time.sleep(3)
11 
12 if __name__=='__main__':
13     t1=MyThread(1)
14     t2=MyThread(2)
15     t1.start()
16     t2.start()