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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _node_rating_count(self):
 """ Return node_rating_count record or create it if it does not exist usage: node = Node.objects.get(pk=1) node.rating_count """

    try:
        return self.noderatingcount
    except ObjectDoesNotExist:
        node_rating_count = NodeRatingCount(node=self)
        node_rating_count.save()
        return node_rating_count