code: def set_listing_type(self, listing_type):
          
  
          if not isinstance(listing_type, SaleType) and not isinstance(listing_type, RentType):
              raise DaftException("listing_type should be an instance of SaleType or RentType.")
  
          self._listing_type = listing_type
docs: The listings you'd like to scrape i.e houses, properties, auction, commercial or apartments.
          Use the SaleType or RentType enum to select the listing type.
          i.e set_listing_type(SaleType.PROPERTIES)
          :param listing_type:
          :return: