Deep Dive Part 4 Oop High Quality | Python 3

@abstractmethod def write(self, data): pass class FileStream(Stream): def read(self): return "data" def write(self, data): print(f"writing {data}")

: 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: python 3 deep dive part 4 oop high quality

class Bird: def (self, mover, flyer): self.mover = mover self.flyer = flyer def move(self): return self.mover.move() def fly(self): return self.flyer.fly() Method Resolution Order (MRO) – C3 Linearization Python

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Overriding __new__ allows you to control instance creation (e.g., caching, pooling, immutables). Never mutate __new__ without good reason, but understand it. 3. Properties vs. Getters/Setters – The Pythonic Way In languages like Java, private attributes are accessed via getters/setters. In Python, we start with public attributes and refactor to properties when needed. private attributes are accessed via getters/setters.

Sized.register(MyContainer) # Now MyContainer is considered a subclass of Sized