code: def get_incumbent_id(self):
  		
  		tmp_list = []
  		for k,v in self.data.items():
  			try:
  				# only things run for the max budget are considered
  				res = v.results[self.HB_config['max_budget']]
  				if not res is None:
  					tmp_list.append((res['loss'], k))
  			except KeyError as e:
  				pass
  			except:
  				raise
  
  		if len(tmp_list) > 0:
  			return(min(tmp_list)[1])
  		return(None)
docs: Find the config_id of the incumbent.
  
  		The incumbent here is the configuration with the smallest loss
  		among all runs on the maximum budget! If no run finishes on the
  		maximum budget, None is returned!