python字典查询功能

def fetch(data):
    print(' 查询功能')
    print('用户数据是',data)


def add():
    pass


def change():
    pass


def delete():
    pass


if __name__ == '__main__':

    msg = '''
    1: 查询
    2. 添加
    3. 修改
    4. 删除
    5. 退出
    '''

    msg_dict = {
        '1': fetch,
        '2': add,
        '3': change,
        '4': delete
    }

    while True:
        print(msg)
        choice = input('请输入你的选项:').strip()

        if not choice:
            continue
        if choice == '5':
            break

        data = input('请输入你的数据：').strip()
        msg_dict[choice](data)