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A mixin in Python is a class that provides methods to other classes through inheritance but isn’t meant to stand alone. You use mixins to add specific behaviors to classes without forming a rigid hierarchy.
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You use mixins to achieve code reuse by composing classes with reusable behaviors. Mixins allow you to add functionality to different classes without duplicating code or creating deep inheritance hierarchies.
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You identify a mixin class by its naming convention, usually ending with “Mixin,” and by its narrow focus on providing a single behavior without maintaining state. Mixins usually don’t inherit from other classes and aren’t meant to be instantiated on their own.
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Mixins can have state, but it’s generally discouraged because it can lead to conflicts in multiple inheritance scenarios. If you need state, then consider using class attributes, closures, or decorators instead.
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The risks include potential conflicts in method resolution order, especially if mixins are overused or ordered incorrectly. They can also make debugging and understanding the codebase more difficult if not implemented carefully.
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