code: def get_hash(self, place):
          
          pickled_place = self._pickle(place)
          try:
              return self.redis.geohash(self.key, pickled_place)[0]
          except (AttributeError, TypeError):
              return None
docs: Return the Geohash of *place*.
          If it's not present in the collection, ``None`` will be returned
          instead.