import time, threading
balance = 0
def change_it(n):
#先存后取，结果应该为0： global balance balance = balance + n balance = balance - n
def run_thrad(n): for i in range(1000000000): change_it(n)
t1 = threading.Thread(target=run_thrad, args=(5,)) t2 = threading.Thread(target=run_thrad,args=(8,)) t1.start() t2.start() t1.join() t2.join() print(balance)
结果： 7257
发家致富
我不管怎么运行最后都是0，想出错都错不了。加几个sleep中间输出有几个5，8的，但最后一定是0.
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GOGOGO-枼子
import time, threading
假定这是你的银行存款
balance = 0
def change_it(n):
def run_thrad(n): for i in range(1000000000): change_it(n)
t1 = threading.Thread(target=run_thrad, args=(5,)) t2 = threading.Thread(target=run_thrad,args=(8,)) t1.start() t2.start() t1.join() t2.join() print(balance)
结果： 7257