python8.2线程锁

import threading

lock=threading.Lock()#创建线程锁：互斥锁
num=100
def run(name):
lock.acquire()#设置锁
global num#设置全局变量num
num=num-1
print("线程",num,"执行了，目前num的值为：",num)
lock.release()#释放锁

#for循环创建100个线程
for i in range(100):
t=threading.Thread(target=run,args=(i+1,))
t.start()