[Solved] You have three classes: Logger, Authenticator, and Service. You want Service to inherit from... How should you design Service to ensure both parent initializers run properly without duplication? | Python

Python - Multiple Inheritance and Method Resolution

You have three classes: Logger, Authenticator, and Service. You want Service to inherit from both Logger and Authenticator. How should you design Service to ensure both parent initializers run properly without duplication?

AUse <code>super().__init__()</code> in all classes and ensure they call super() in their <code>__init__</code>.

BCall each parent <code>__init__</code> directly inside <code>Service.__init__</code>.

COnly call <code>Logger.__init__</code> in <code>Service</code> and skip <code>Authenticator</code>.

DDo not define <code>__init__</code> in <code>Service</code> to avoid conflicts.

Step-by-Step Solution

Solution:

Step 1: Understand multiple inheritance init calls
To ensure all parent initializers run once, each class should call super().__init__() so Python follows MRO.
Step 2: Design Service and parents accordingly
All classes including Logger and Authenticator must use super().__init__() in their constructors.
Final Answer:
Use super().__init__() in all classes and ensure they call super() in their __init__. -> Option A
Quick Check:
Use super() in all __init__ to avoid duplication [OK]

Quick Trick: All __init__ should call super().__init__() for safe multiple inheritance [OK]

Common Mistakes:

Calling parent __init__ methods directly
Skipping __init__ in some parent classes
Assuming __init__ runs automatically for all parents

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How should you design Service to ensure both parent initializers run properly without duplication?

Step 1: Understand multiple inheritance init calls

Step 2: Design Service and parents accordingly

Final Answer:

Quick Check:

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