pprint

import pprint


def repr(self):
    keys = [attr for attr in dir(self) if attr[0] != '_']
    objs = {key:getattr(self, key) for key in keys}
    objs['self'] = f'{self.__class__.__name__}({self.val}): 0x{id(self):x}'
    return pprint.pformat(objs, depth=2)


class Node:
    def __init__(self, val=None, right=None, left=None):
        self.val = val
        self.right = right
        self.left = left

# method binding
Node.__repr__ = repr

n1 = Node(1)
n1.right = Node(2)
n1.left = Node(3)
n1.right.right = Node(4)
n2 = Node(7)
n2.right = Node(8)
n2.a = '@@'
n1.right.left = [Node(5), Node(6), {'test': n2}, [{'test2': Node(11)}]]

obj = dict(eval(n1.__repr__()))
pprint.pprint(obj)