鞍山市

from threading import Thread,Lock
import os,time
def work(lock):
   global n
   with lock:
      temp=n
      time.sleep(0.1)
      n=temp-1
      n=temp-1
if __name__ == ‘__main__‘:
   n=100
   l=[]
   lock = Lock()
   for i in range(100):
      p=Thread(target=work,args = (lock,))
      l.append(p)
      p.start()
   for p in l:
      p.join()
   print(n) #结果可能为99

鞍山市

原文：https://www.cnblogs.com/yuanshitianzun/p/10473282.html