code: def load_config(self, conf_path):
          
          if conf_path is None:
              return
  
          conf = configparser.ConfigParser()
          conf.read(conf_path)
  
          self.config.load_config(conf)
          for r in routines.__all__:
              self.__dict__[r.lower()].config.load_config(conf)
  
          logger.debug('Loaded config file from {}.'.format(conf_path))
docs: Load config from an ``andes.conf`` file.
  
          This function creates a ``configparser.ConfigParser`` object to read
          the specified conf file and calls the ``load_config`` function of the
          config instances of the system and the routines.
  
          Parameters
          ----------
          conf_path : None or str
              Path to the Andes config file. If ``None``, the function body
              will not run.
  
          Returns
          -------
          None