Method loss_change

demo/guide-python/model_parser.py:61–63

Loss gain of a node.

(self, node_id: int)

        self.nodes = nodes

    def loss_change(self, node_id: int) -> float:
        """Loss gain of a node."""
        return self.nodes[node_id].loss_chg

    def sum_hessian(self, node_id: int) -> float:
        """Sum Hessian of a node."""