code: def get_parser():
      
  
      # initialize the parser
      parser = argparse.ArgumentParser(
          description=(
              'Command line tool for extracting text from any document. '
          ) % locals(),
      )
  
      # define the command line options here
      parser.add_argument(
          'filename', help='Filename to extract text.',
      ).completer = argcomplete.completers.FilesCompleter
      parser.add_argument(
          '-e', '--encoding', type=str, default=DEFAULT_ENCODING,
          choices=_get_available_encodings(),
          help='Specify the encoding of the output.',
      )
      parser.add_argument(
          '--extension', type=str, default=None,
          choices=_get_available_extensions(),
          help='Specify the extension of the file.',
      )
      parser.add_argument(
          '-m', '--method', default='',
          help='Specify a method of extraction for formats that support it',
      )
      parser.add_argument(
          '-o', '--output', type=FileType('wb'), default='-',
          help='Output raw text in this file',
      )
      parser.add_argument(
          '-O', '--option', type=str, action=AddToNamespaceAction,
          help=(
              'Add arbitrary options to various parsers of the form '
              'KEYWORD=VALUE. A full list of available KEYWORD options is '
              'available at http://bit.ly/textract-options'
          ),
      )
      parser.add_argument(
          '-v', '--version', action='version', version='%(prog)s '+VERSION,
      )
  
      # enable autocompletion with argcomplete
      argcomplete.autocomplete(parser)
  
      return parser
docs: Initialize the parser for the command line interface and bind the
      autocompletion functionality