验证码定时刷新

from threading import Thread, Timer
import random


class code:
    def __init__(self):
        self.make_cach()

    def make_cach(self, interval = 5):
        self.cach = self.make_code()
        print(self.cach)
        self.t = Timer(interval, self.make_cach)
        self.t.start()

    def make_code(self,n=4):
        res = ''
        for i in range(n):
            s1 = str(random.randint(0,9))
            s2 = chr(random.randint(65,90))
            res += random.choice([s1, s2])
        return res

    def check(self):
        while True:
            code = input('>>>:').strip()
            if code.upper() == self.cach:
                print('验证成功')
                self.t.cancel()
                break


boj = code()
boj.check()