import random,tkinter

n=code=''
count=0#计数器
for i in range(5):
    add=random.choice([random.randrange(10),chr(random.randrange(65,90)),chr(random.randrange(97,122))])
    code+=str(add)

print("            -------------    ")
f=print("               ",code,"    ")
print("            -------------    ")

while count<3:
    yz=str(input("请输入验证码 : "))
    if yz==code:
        print("登陆成功 ！")
        break
    else:
        count+=1
        print("输入有误 ^_^ ")