# 定义返回值类
class Response:
    def __init__(self, code, data, message):
        self.code = code
        self.data = data
        self.message = message

    def to_dict(self):
        return {
            "code": self.code,
            "data": self.data,
            "message": self.message
        }

    @classmethod
    def success(cls, data=None, message="操作成功"):
        return cls(200, data, message).to_dict()

    @classmethod
    def error(cls, data=None, message="操作失败", code=400):
        return cls(code, data, message).to_dict()