code: def _get_cumulative_results(self, results):
          
          hits = {'total': 0, 'unique': 0}
  
          day_hits = list(hits[0] for hits in results.values() if hits)
          for metrics in day_hits:
              hits['total'] += metrics['nb_hits']
              hits['unique'] += metrics['nb_uniq_visitors']
  
          return hits
docs: Returns a dictionary of {'total': x, 'unique': y} for the
          date range.