class User:
    def __init__(self, nickname, phone_number, password, identity, is_active):
        self.nickname = nickname  # 用户昵称
        self.phone_number = phone_number  # 手机号
        self.password = password  # 密码
        self.identity = identity  # 身份（老师或学生）
        self.is_active = is_active  # 状态（是否可用）

    def __str__(self):
        return f"User({self.nickname}, {self.phone_number}, {'Teacher' if self.identity == 'teacher' else 'Student'}, {'Active' if self.is_active else 'Inactive'})"