code: def remove_negativescores_nodes(self):
          
          gravity_items = self.parser.css_select(self.top_node, "*[gravityScore]")
          for item in gravity_items:
              score = self.parser.getAttribute(item, 'gravityScore')
              score = int(score, 0)
              if score < 1:
                  item.getparent().remove(item)
docs: \
          if there are elements inside our top node
          that have a negative gravity score,
          let's give em the boot