2020 7.15

import time
number = 0
user_data = {}
with open(r"C:\Users\S\Desktop\userdata.txt", mode="rt", encoding="utf-8") as f:
    for line in f:
        i, j = line.strip('\n').split(":")
        user_data[i] = j


id_word = input("请输入你的账号:")
while True:
    password = input("请输入你的密码:")
    # 用户未注册
    if id_word not in user_data.keys():
        print("请输入正确的账号！")
        id_word = input("请输入你的账号:")
    # 判断账户与密码是否匹配
    else:
        if password == user_data[id_word]:
            print("登陆成功！")
            break
        else:
            print("密码输入错误，请再试一次！")
            number += 1
            print("您还有%d机会" % (3-number))
            if number == 3:
                number -= 3 #重置次数
                print("次数已用尽，请五分钟后重试。")
                time.sleep(300)
                id_word = input("请重新输入你的账号:")

本文地址：https://blog.csdn.net/A1L__/article/details/107366855