Method is_leaf

demo/guide-python/model_parser.py:104–106

Whether a node is leaf.

(self, node_id: int)

        return self.nodes[node_id].right

    def is_leaf(self, node_id: int) -> bool:
        """Whether a node is leaf."""
        return self.nodes[node_id].left == -1

    def is_deleted(self, node_id: int) -> bool:
        """Whether a node is deleted."""