code: def _ReadCompressedData(self, read_size):
      
      self._uncompressed_data = self._zip_ext_file.read(read_size)
      self._uncompressed_data_size = len(self._uncompressed_data)
docs: Reads compressed data from the file-like object.
  
      Args:
        read_size (int): number of bytes of compressed data to read.