code: def encode(self, s):
      
      try:
        import matplotlib.image as im  # pylint: disable=g-import-not-at-top
      except ImportError as e:
        tf.logging.warning(
            "Reading an image requires matplotlib to be installed: %s", e)
        raise NotImplementedError("Image reading not implemented.")
      return im.imread(s)
docs: Transform a string with a filename into a list of RGB integers.
  
      Args:
        s: path to the file with an image.
  
      Returns:
        ids: list of integers