[Solved] You want to create a class SmartPhone that inherits features from Camera and Phone.... How should you design SmartPhone to properly initialize both parents following best practices? | Python

Python - Multiple Inheritance and Method Resolution

You want to create a class SmartPhone that inherits features from Camera and Phone. Both parents have an __init__ method. How should you design SmartPhone to properly initialize both parents following best practices?

A

Define <code>SmartPhone.__init__</code> and call <code>super().__init__()</code> only once, relying on parents to use super() too

BDefine <code>SmartPhone.__init__</code> but leave it empty

CDo not define <code>__init__</code> in <code>SmartPhone</code>, parents will initialize automatically

D

Define <code>SmartPhone.__init__</code> and call <code>Camera.__init__(self)</code> and <code>Phone.__init__(self)</code> directly

Step-by-Step Solution

Solution:

Step 1: Understand multiple inheritance initialization
Both Camera and Phone have __init__. To initialize both properly, each class should call super().__init__() so the MRO chain is followed.
Step 2: Apply best practice in SmartPhone
Define SmartPhone.__init__ and call super().__init__() once. This triggers the chain of __init__ calls in parents via MRO.
Final Answer:
Define SmartPhone.__init__ and call super().__init__() only once, relying on parents to use super() too -> Option A
Quick Check:
Use super() chain for clean multiple inheritance init [OK]

Quick Trick: Call super().__init__() once; parents must do the same [OK]

Common Mistakes:

Calling parent __init__ methods directly
Not calling any __init__ in child
Assuming parents initialize automatically without super()

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More Python Quizzes

How should you design SmartPhone to properly initialize both parents following best practices?

Step 1: Understand multiple inheritance initialization

Step 2: Apply best practice in `SmartPhone`

Final Answer:

Quick Check:

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