'If there are elements inside our top node that have a
negative gravity score, let\'s give em the boot.'

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 = (float(score) if score else 0)
        if (score < 1):
            item.getparent().remove(item)
