Python实现的多线程同步与互斥锁功能示例

#! /usr/bin/env python#coding=utf-8import threadingimport time'''#1、不加锁num = 0class MyThread(threading.Thread):  def run(self):    global num    time.sleep(1) #一定要sleep！！！    num = num + 1    msg = self.name + ' num is ---- ' + str(num)    print msgdef test():  for i in range(10):    s = MyThread() #实例化一个Thread对象，每个Thread对象代表着一个线程    s.start() #通过start()方法，开始线程活动'''#'''class MyThread(threading.Thread):  def run(self):    for i in range(3):      time.sleep(1)      msg = self.name+' @ '+str(i)      print msgdef test():  for i in range(5):    t = MyThread()    t.start()#''''''#2、加锁num = 0 #多个线程共享操作的数据mu = threading.Lock() #创建一个锁class MyThread(threading.Thread):  def run(self):    global num    time.sleep(1)    if mu.acquire(True): #获取锁状态，一个线程有锁时，别的线程只能在外面等着      num = num + 1      msg = self.name + ' num is ---- ' + str(num)      print msg      mu.release() #释放锁def test():  for i in range(10):    s = MyThread()    s.start()'''if __name__ == '__main__':  test()