Instead of deep inheritance trees, use composition:

Using special methods makes your objects first-class citizens in Python.

obj = LazyRecord() print(obj.exists) # 1 print(obj.foo) # Computing foo -> Generated foo

Python 3 Deep Dive Part 4 Oop Jun 2026

Instead of deep inheritance trees, use composition:

Using special methods makes your objects first-class citizens in Python.

obj = LazyRecord() print(obj.exists) # 1 print(obj.foo) # Computing foo -> Generated foo