Python 3 Deep Dive Part — 4 Oop High Quality

High-quality classes behave like native types. If you have a mathematical object, it should support + and - .

class DeepThought: @lazy def answer(self): print("Computing for 7.5 million years...") return 42

p1 = Point(3, 4) p2 = Point(3, 4, "blue") print(p1 == p2) # False (color differs) print(p1 < p2) # True (x compares first) python 3 deep dive part 4 oop high quality

class Car(Engine): def drive(self): self.start()

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: A class becomes a descriptor if it implements __get__ , __set__ , or __delete__ .

A well-designed property shields internal implementation details from the outside world, embodying the principle of encapsulation. For example, you might store a temperature in Celsius internally but expose a property that returns Fahrenheit, seamlessly converting units without the caller needing to know anything about the internal representation. High-quality classes behave like native types

This narrative is structured like a technical chapter in an advanced book, blending conceptual depth with practical, quirky Python examples.

Ensures flexible code testing and strict modern static type-checking. Clean component composition, mixin patterns. : A class becomes a descriptor if it

A comparing the exact memory footprint of standard dict-based objects vs. __slots__ objects.

Entering D Entering B Entering C Entering A Leaving A Leaving C Leaving B Leaving D Use code with caution.