def __init__(
        self,
        project_id,
        trial_no,
        trial_type,
        model_id,
        model_name=None
):
    """
    待部署的模型实例
    Args:
        project_id (int): 项目id
        trial_no (int): 实验id
        trial_type (int): 实验类型
        model_id (int): 模型id
        model_name (str): 模型名称
    """
    self.project_id = project_id
    self.trial_no = trial_no
    self.trial_type = trial_type
    self.model_id = model_id
    self.model_name = model_name

def download_model(self, dir_path=None):
    """
    下载模型文件到指定的目录， 默认~/deepwisdom/models。 目前支持表格类下载
    Args:
        dir_path (string): 自定义目录路径

    Returns:

    """
    data = {
        "model_id": self.model_id
    }

    server_data = self._server_data(API_URL.MODEL_DOWNLOAD, data)
    if dir_path is None:
        dir_path = _get_models_dir()

    file_list = server_data["model_files"]
    for file_obj in file_list:
        if "is_dir" in file_obj and file_obj["is_dir"] is True:
            continue

        r = requests.get(file_obj["file_url"], stream=True)
        file_path = _get__model_file(dir_path, file_obj["file_name"].split("/")[-1])
        with open(file_path, "wb") as f:
            for chunk in r.iter_content(chunk_size=1024):  # 1024 bytes
                if chunk:
                    f.write(chunk)