Python 3 Deep Dive Part 4 Oop High Quality -

class Circle: def __init__(self, radius): self.radius = radius # Uses setter if defined @property def radius(self): return self._radius

from collections.abc import Sized class MyContainer: def (self): return 10 python 3 deep dive part 4 oop high quality

: Avoid complicated multiple inheritance (diamonds). If you need mixins, keep them small and method names unique. 8. Abstract Base Classes (ABCs) – Enforcing Contracts Abstract base classes define interfaces that subclasses must implement. class Circle: def __init__(self, radius): self

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: Always use super() in inheritance hierarchies, even for single inheritance. It’s future-proof. 7. Method Resolution Order (MRO) – C3 Linearization Python computes MRO using the C3 linearization algorithm (no diamond problem). You can inspect MRO: even for single inheritance. It’s future-proof.

class Point: def __init__(self, x, y): self.x = x self.y = y # Each instance has a __dict__ (~72 bytes overhead + per attr) :