#! /usr/bin/env python

def build_local_chain_but_do_not_return_it():
    root = {}
    a = { 'parent': root }
    b = { 'parent': a }
    c = { 'parent': b }
    root['parent'] = c

    print(c)
    return None

build_local_chain_but_do_not_return_it()