simple_namespace.py

import pprint
import types


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

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)}]]

pprint.pprint(n1)
# Node(val=1,
#      right=Node(val=2,
#                 right=Node(val=4, right=None, left=None),
#                 left=[Node(val=5, right=None, left=None),
#                       Node(val=6, right=None, left=None),
#                       {'test': Node(val=7,
#                                     right=Node(val=8, right=None, left=None),
#                                     left=None,
#                                     a='@@')},
#                       [{'test2': Node(val=11, right=None, left=None)}]]),
#      left=Node(val=3, right=None, left=None))