Online Treelib Compiler

from treelib import Node, Tree
from treelib.exceptions import DuplicatedNodeIdError
from collections.abc import Sized as root

tree = Tree()

def add_to_tree(node, parent=None):
    tree.create_node(node.__name__, id(node), parent=parent)
    subclasses = node.__subclasses__()
    for sc in subclasses:
        try:
            add_to_tree(sc, parent=id(node))
        except DuplicatedNodeIdError:
            pass

add_to_tree(root)
tree.show()