[Solved] Which of these implementations is correct?class User: def __init__(self, name, age): self.name = name self.age = age @classmethod def default_user(cls): return cls("Guest", 0) | Python

Python - Class Methods and Static Methods

You want to create a class method that returns a new instance of the class with default values. Which of these implementations is correct?

class User:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    @classmethod
    def default_user(cls):
        return cls("Guest", 0)

AThe method should use self instead of cls to create the instance.

BThe method correctly returns a new User instance with default values.

CThe method should be a static method, not a class method.

DThe method is missing a return statement.

Step-by-Step Solution

Solution:

Step 1: Understand purpose of class method
Class methods can be used as alternative constructors to create instances with default or custom values.
Step 2: Check method implementation
The method uses cls to call the constructor with default arguments and returns the new instance.
Final Answer:
The method correctly returns a new User instance with default values. -> Option B
Quick Check:
Use cls() in classmethods to create new instances [OK]

Quick Trick: Use cls() inside classmethods to create new instances [OK]

Common Mistakes:

Using self instead of cls
Forgetting to return the new instance
Confusing static and class methods

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More Python Quizzes

You want to create a class method that returns a new instance of the class with default values. Which of these implementations is correct?

Step 1: Understand purpose of class method

Step 2: Check method implementation

Final Answer:

Quick Check:

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