Python Coding challenge - Day 961| What is the output of the following Python Code?

 

Code Explanation:

1. Class Definition

class A:

This defines a new class named A.

2. Overriding __setattr__ Method

    def __setattr__(self, k, v):

__setattr__ is a special method in Python.

It is automatically called whenever an attribute is assigned to an object.

Parameters:

self → the object itself

k → name of the attribute being assigned

v → value being assigned

3. Custom Attribute Assignment

        super().__setattr__(k, v * 2)

Calls the parent class (object) __setattr__ method.

Instead of storing v, it stores v * 2.

This means every value assigned to an attribute will be doubled before storage.

4. Creating an Object

a = A()

Creates an instance a of class A.

5. Assigning an Attribute

a.x = 3

Triggers A.__setattr__(a, 'x', 3)

Inside __setattr__, value becomes 3 * 2 = 6

So internally:

a.x = 6

6. Printing the Attribute

print(a.x)

Prints the stored value of x, which is 6.

7. Final Output

6

900 Days Python Coding Challenges with Explanation