day12作业

import json



def login_interface():
    while True:
        print("==========================")
        print("                          ")
        print("   *欢迎来到XX管理系统*   ")
        print("                          ")
        print("   ♦  1.登           录   ")
        print("   ♦  2.注           册   ")
        print("   ♦  3.退           出   ")
        print("==========================")
        x = input("请选择(1-3):")
        if int(x) == 3:
            break
        elif int(x) == 1:
            with open("test.txt", "r", encoding="utf-8") as f:
                users = eval(f.read())
            user_name = input("请输入账号(3~6位):")
            passwork = input("请输入密码(6~12位):")
            if not 3 <= len(user_name) <= 6 and not 6 <= len(passwork) <= 12:
                print("登陆失败账号密码长度不对，请重新登陆！")
            elif user_name not in users:
                print("此账号没被注册！请重新登陆！")
            elif users[user_name] != passwork:
                print("登陆失败！密码不对！请重新登陆！")
            elif users[user_name] == passwork:
                print("登陆成功！")
                welcome_screen(user_name)
                break
        elif int(x) == 2:
            with open("test.txt", "r", encoding="utf-8") as f:
                users = eval(f.read())
            user_name = input("请输入账号(3~6位):")
            passwork = input("请输入密码(6~12位):")
            if not 3 <= len(user_name) <= 6 and not 6 <= len(passwork) <= 12:
                print("注册的账号密码长度不对！请重新注册")
            else:
                users[user_name] = passwork
                with open("test.txt", "w", encoding="utf-8") as f:
                    f.write(str(users))
                    print("注册成功！请登录")
    return "欢迎下次光临！"


def welcome_screen(user_name):
    print("欢迎来到%s管理系统" % user_name)
    print("                  ")
    print("   🔺·1.登陆     ")
    print("   🔺·1.注册     ")
    print("   🔺·1.退出     ")
    return


print(login_interface())