You can have more than one way of creating objects • alternative constructors using class methods

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Class methods in Python can serve as alternative constructors, providing multiple ways to create instances beyond the standard `__init__()` method. Using the `@classmethod` decorator, you can define methods that create and customize instances before returning them. This pattern is common in Python's standard library (like `dict.fromkeys()` and `datetime.datetime.fromisoformat()`) and helps maintain loose coupling between classes while offering convenient initialization options. The article demonstrates this through a meal planning application where a `ShoppingList` can be created either empty or directly from a `WeeklyMealPlanner` instance.

Planning Meals, Weekly Shop, Alternative Constructors Using Class Methods

Setting the Scene • Outlining the Meal and WeeklyMealPlanner Classes