code: def _load_data(self):
          
          if self.raw_data is None and self.data_format is not FormatType.PYTHON:
              if self.file_path is None:
                  raise ArgumentInvalid('One of "raw_data" or "file_path" should be set!')
              if not os.path.isfile(self.file_path) or not os.access(self.file_path, os.R_OK):
                  raise ArgumentInvalid('"file_path" should be a valid path to an exist file with read permission!')
              with open(self.file_path) as f:
                  self.raw_data = f.read()
docs: Load data from raw_data or file_path