code: def _feature_most_population(self, results):
          
  
          try:
              populations = [i['population'] for i in results['hits']['hits']]
              most_pop = results['hits']['hits'][np.array(populations).astype("int").argmax()]
              return most_pop['country_code3']
          except Exception as e:
              return ""
docs: Find the placename with the largest population and return its country.
          More population is a rough measure of importance.
  
          Paramaters
          ----------
          results: dict
              output of `query_geonames`
  
          Returns
          -------
          most_pop: str
              ISO code of country of place with largest population,
              or empty string if none