Python Coding challenge - Day 1136| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Class Definition

class Test:

This line defines a class named Test.

A class is a blueprint used to create objects.

🔹 2. Constructor Method (__init__)

def __init__(self):

    self.count = 0

__init__ is a constructor, automatically called when an object is created.

self refers to the current object instance.

self.count = 0 initializes a variable count and sets it to 0.

🔹 3. Callable Method (__call__)

def __call__(self):

__call__ makes the object behave like a function.

This means you can use obj() instead of calling a method explicitly.

Inside __call__

self.count += 1

Each time the object is called, count increases by 1.

return self.count

Returns the updated value of count.

🔹 4. Creating Object

obj = Test()

Creates an instance (object) of class Test.

The constructor runs, so count = 0.

🔹 5. Calling the Object

print(obj(), obj(), obj())

What happens step-by-step:

👉 First obj()

Calls __call__

count = 0 → 1

Returns 1

👉 Second obj()

count = 1 → 2

Returns 2

👉 Third obj()

count = 2 → 3

Returns 3

🔹 Final Output

1 2 3

Book: 900 Days Python Coding Challenges with Explanation