Python Coding challenge - Day 1132| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Class A Definition

class A:

✅ Explanation:

A class A is created.

It overrides the special method __new__.

🔹 2. __new__ Method in Class A

def __new__(cls):

    print("A new")

    return super().__new__(B)

✅ Explanation:

__new__ is responsible for creating a new object (before __init__).

It runs before __init__.

🔍 Step-by-step:

print("A new") → prints:

A new

super().__new__(B):

Instead of creating an object of class A

It creates an object of class B

So, the returned object is NOT of type A, but type B

🔹 3. Class B Definition

class B:

✅ Explanation:

A separate class B is defined.

It has its own constructor.

🔹 4. Constructor of Class B

def __init__(self):

    print("B init")

✅ Explanation:

This runs when an object of class B is initialized.

Prints:

B init

🔹 5. Object Creation

obj = A()

✅ What happens internally:

Step 1: Call A.__new__(A)

Prints:

A new

Returns an object of class B

Step 2: Python checks returned object type

Returned object is of type B

So Python calls:

B.__init__(obj)

Step 3: Execute B.__init__

Prints:

B init

🎯 Final Output

A new

B init

Book: 900 Days Python Coding Challenges with Explanation