Should I worry about circular references in Python?

Question

Suppose I have code that maintains a parent/children structure. In such a structure I get circular references, where a child points to a parent and a parent points to a chil

Answer 1

Experimentally: you're fine:

import itertools

for i in itertools.count():
    a = {}
    b = {"a":a}
    a["b"] = b

It consistently stays at using 3.6 MB of RAM.