code: def get_command_line_arguments():
      
  
      parser = argparse.ArgumentParser(add_help=False)
  
      parser.add_argument("-h",
                          "--help",
                          action="help",
                          help="'Displays this help message and exit.'")
  
      parser.add_argument("-t",
                          "--title",
                          type=unicode,
                          dest="title",
                          help="'Package title.'")
  
      parser.add_argument("-i",
                          "--input",
                          type=unicode,
                          dest="input",
                          help="'Input file to convert.'")
  
      parser.add_argument("-o",
                          "--output",
                          type=unicode,
                          dest="output",
                          help="'Output file.'")
  
      parser.add_argument("-c",
                          "--content_directory",
                          type=unicode,
                          dest="content_directory",
                          help="'Content directory.'")
  
      if len(sys.argv) == 1:
          parser.print_help()
          sys.exit(1)
  
      return parser.parse_args()
docs: Retrieves command line arguments.
  
      :return: Namespace.
      :rtype: Namespace