Part 4 Oop High Quality: Python 3 Deep Dive

class HelloPlugin(Plugin): def run(self): print("Hello")

@celsius.setter def celsius(self, value): if value < -273.15: raise ValueError("Temperature below absolute zero") self._celsius = value python 3 deep dive part 4 oop high quality

Circle satisfies Drawable without explicit inheritance — . 14. Common Anti-Patterns to Avoid | Anti-Pattern | Why It’s Bad | High-Quality Alternative | |--------------|---------------|---------------------------| | God Object | One class does everything | SRP + decomposition | | Circular imports | Two classes import each other | Move shared code to a third module | | Overusing inheritance | “Is-a” forced where “has-a” fits | Composition | | Mutable defaults | def __init__(self, items=[]) | def __init__(self, items=None) | | Using __slots__ prematurely | Optimizes nothing, restricts future | Only after profiling memory | 15. Real-World Case Study: Building a Plugin System Let’s combine everything into a high-quality OOP design: a plugin architecture for a data processing pipeline. Real-World Case Study: Building a Plugin System Let’s

Without implementing both methods, CSVExporter cannot be instantiated. This catches errors early. Python supports multiple inheritance. Unlike C++, Python resolves method conflicts with the C3 Linearization (Method Resolution Order) . Access it via ClassName.__mro__ . Python supports multiple inheritance