docs: def config_args(self, section="main"):
          """
          Additional method for feeding input arguments from a config file.
          
          :param section: current config section name
          """
          if self._config_parsed:
              return
          for a in self._filtered_actions("config"):
              for o in a.option_strings:
                  try:
                      i = sys.argv.index(o)
                      sys.argv.pop(i)  # remove the option string
                      sys.argv.pop(i)  # remove the value that follows
                  except ValueError:
                      pass
          for a in self._sorted_actions():
              self._set_arg(a, section, True)
          self._config_parsed = True