code: def load_external_data_for_tensor(tensor, base_dir):  # type: (TensorProto, Text) -> None
      
      if tensor.HasField("raw_data"):  # already loaded
          return
      info = ExternalDataInfo(tensor)
      file_location = _sanitize_path(info.location)
      external_data_file_path = os.path.join(base_dir, file_location)
  
      with open(external_data_file_path, 'rb') as data_file:
  
          if info.offset:
              data_file.seek(info.offset)
  
          if info.length:
              tensor.raw_data = data_file.read(info.length)
          else:
              tensor.raw_data = data_file.read()
docs: Load data from an external file for tensor.
  
      @params
      tensor: a TensorProto object.
      base_dir: directory that contains the external data.