(self, node, leaf_num=10)
设置树的根节点

        Args:
            node:

        Returns:
设置树的根节点
设置树的根节点
def link_to_head(self, node, leaf_num=10):
        """ 设置树的根节点

        Args:
            node:

        Returns:

        """
        self._head.add_child_node(node, leaf_num)
def link_to_head ( self , node , leaf_num = 10 ) : self . _head . add_child_node ( node , leaf_num )