code: def read_data(self):
          
          with self.__lock:
              absolute_file_path = self.__file_path
              #logging.debug("READ data file %s", absolute_file_path)
              with open(absolute_file_path, "rb") as fp:
                  local_files, dir_files, eocd = parse_zip(fp)
                  return read_data(fp, local_files, dir_files, b"data.npy")
              return None
docs: Read data from the ndata file reference
  
              :param reference: the reference from which to read
              :return: a numpy array of the data; maybe None