Question

I want to create variables whose type is of the same class in which they are declared:

Class C:
    def __init__(self):
        self.v = C()

It’s not working, is there some trick to make this work?

Answer 1

Python does not use static typing, so there is no need to do something special for references inside a class to objects of the same type.

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

leaf1 = Node()
leaf2 = Node()
parent = Node(leaf1, leaf2)