code: def household_id(self):
          
          # Since this does not change over time (?) check whether we already
          # know the answer. If so, return the cached version
          if self._household_id is None:
              self._household_id = self.deviceProperties.GetHouseholdID()[
                  'CurrentHouseholdID']
          return self._household_id
docs: str: A unique identifier for all players in a household.
  
          Looks like: ``'Sonos_asahHKgjgJGjgjGjggjJgjJG34'``