docs: def get_parser():
      """Return the parser object for this script."""
      from argparse import ArgumentParser, ArgumentDefaultsHelpFormatter
      parser = ArgumentParser(description=__doc__,
                              formatter_class=ArgumentDefaultsHelpFormatter)
      parser.add_argument("-n",
                          dest="n", default=10, type=int,
                          help="Show TOP-N results")
      parser.add_argument("--port",
                          dest="port", default=5000, type=int,
                          help="where should the webserver run")
      parser.add_argument("--use_segmenter",
                          dest="use_segmenter",
                          default=False,
                          action='store_true',
                          help=("try to segment the input for multiple symbol "
                                "recognition"))
      return parser