PYTHON之多线程

import threading
import time

def run(name):
print "i am mult-threding",i
time.sleep(2)
for i in range(20):
t=threading.Thread(target=run,args=(i,))
t.start()

class mythread(threading.Thread):
def __init__(self,num):
threading.Thread.__init__(self)
self.num=num
def run(self):
print "i am thread %s"% self.num
time.sleep(2)
print "OK"
for i in range(20):
t=mythread(i)
t.start()