``` import threading import time g_number = 0 def worker1(lock): global g_number for i in range(1000000): # 尝试获取并且加锁　如果没有被锁定　就可以被我锁定；　 # 如果已经被锁定　阻塞等待　直到成功获取并且锁定　 lock.acquire() g_number += 1 # 释放锁资源　解锁　　未锁定　－－－－> 未锁定状态 lock.release() # print(g_number) def worker2(lock): global g_number for i in range(1000000): lock.acquire() g_number += 1 lock.release() # time.sleep(1) if __name__ == '__main__': # 创建一把全局互斥锁 lock = threading.Lock() # target指定线程在执行时　的函数　　 # ａｒｇｓ指定这个函数在执行时　所需的参数构成元组　一个元素的元祖需要在元素后加上, thd1 = threading.Thread(target=worker1, args=(lock,)) thd1.start() thd2 = threading.Thread(target=worker2, args=(lock,)) thd2.start() thd1.join() thd2.join() print("比赛的结果是%d" % g_number) # 多个线程同时修改同一个数据　会引起异常 ```