code: def get_parent(self):
          
          if not self.parent:
              parent = self._safe_get_element('ParentASIN')
              if parent:
                  self.parent = self.api.lookup(ItemId=parent)
          return self.parent
docs: Get Parent.
  
          Fetch parent product if it exists.
          Use `parent_asin` to check if a parent exist before fetching.
  
          :return:
              An instance of :class:`~.AmazonProduct` representing the
              parent product.