Python Coding challenge - Day 1158| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Class Definition

class Test:

✅ Explanation:

A class named Test is created.

Inside this class, __setattr__ magic method is overridden.

🔹 2. Overriding __setattr__

def __setattr__(self, name, value):

✅ Explanation:

__setattr__ runs whenever an attribute is assigned.

For example:

obj.x = 5

internally becomes:

obj.__setattr__("x", 5)

🔹 3. Using super().__setattr__

super().__setattr__(name, value * 2)

✅ Explanation:

Before storing value,

it multiplies it by 2.

🔍 Calculation

Original value:

5

Modified value:

5 * 2 = 10

🔹 4. Why super() is Important

⚠️ Important:

If we directly wrote:

self.x = value

it would again call:

__setattr__

leading to:

Infinite Recursion

So we use:

super().__setattr__()

to safely assign value.

🔹 5. Creating Object

obj = Test()

✅ Explanation:

Creates object obj of class Test.

🔹 6. Assigning Attribute

obj.x = 5

🔍 What happens internally:

Python calls:

__setattr__(obj, "x", 5)

Inside method:

value * 2

becomes:

10

Then:

super().__setattr__("x", 10)

stores:

x = 10

🔹 7. Printing Attribute

print(obj.x)

✅ Explanation:

Stored value is already:

10

So output becomes:

10

🎯 Final Output

10

100 Python Programs for Beginner with explanation