购物车1.0

username_list = []
# flag = 0
prize_dict = {'0': 'durex', '1': 'okamoto', '2': 'Jissbon'}
shopping_car_dict = {}


def register():
    print('欢迎来到注册功能:')

    username_register, userpwd_register = user_inp_func()
    with open('user_info.txt', 'a', encoding='utf8') as fa:
        fa.write(f'{username_register}:{userpwd_register}
')

        print(f'用户{username_register}注册成功')


def login():
    if username_list:
        print('请勿重复登陆.')
    # if not judgement():
    #     print('请勿重复登陆.')

    login_count = 0
    while login_count < 3:
        username_inp, userpwd_inp = user_inp_func()
        with open('user_info.txt', 'r', encoding='utf8') as fr:
            for user_info in fr:
                user_info = user_info.strip()
                username_login, userpwd_login = user_info.split(':')

                if username_login == username_inp and userpwd_login == userpwd_inp:
                    print('登录成功')
                    # global flag
                    # flag = 1
                    login_count = 3
                    username_list.append(username_login)
                    break

            else:
                print('账号密码错误')
                login_count += 1


def logout():
    # if not flag :
    #     print('请先登录.')
    #     return
    if not username_list:
        print('请先登录.')
        return

    username_list.clear()
    print('注销成功.')


def shopping():
    if not username_list:
        print('请先登录.')
        return

    print('欢迎选购:')
    print(prize_dict)
    prize_choice = input('请输入商品代码:')
    prize_name = prize_dict[prize_choice]
    if not prize_choice in prize_dict:
        print('无效商品代码.')

    if prize_name in shopping_car_dict:
        shopping_car_dict[prize_name] += 1
    else:
        shopping_car_dict[prize_name] = 1

    print(f'购买{prize_name}成功,购物车情况为:{shopping_car_dict}')


def shopping_car():
    if not username_list:
        print('请先登录.')
        return

    print(f'恭喜购物成功:{shopping_car_dict}')

    shopping_car_dict.clear()


def user_inp_func():
    username_inp = input('请输入用户名:')
    userpwd_inp = input('请输入密码:')

    return username_inp, userpwd_inp


# def judgement():
#     if username_list:
#         print('请先登录后使用..')
#         return
#     else:
#         return 1


func_dict = {
    '1': register,
    '2': login,
    '3': logout,
    '4': shopping,
    '5': shopping_car,
}


def start():
    while 1:
        print('''
    1   注册
    2   登录
    3   注销
    4   购物
    5   购物车
    q   退出
        ''')

        user_choice = input('请输入功能:(输入q退出)')
        if user_choice == 'q':
            break

        if user_choice not in func_dict:
            print('请输入正确功能键:')
            continue

        func_dict[user_choice]()


start()