def METHOD_NAME(self):
    """ Just need input file and output file.  If there is no output file, use stdout.
    """
    self._parser = argparse.ArgumentParser(
      prog='extract_commands.py',
      description=__doc__,
      formatter_class=argparse.RawDescriptionHelpFormatter)
    self._parser.add_argument( 'log_file_path', nargs='?', default='stdin',
                               metavar='PATH1', help="log file path (input - default stdin)")
    self._parser.add_argument( 'command_file_path', nargs='?', default='stdout',
                               metavar='PATH2', help="command file path (output - default stdout)")