Python Coding challenge - Day 1086| What is the output of the following Python Code?

 

Code Explanation:

1️⃣ Defining Class Multiplier

class Multiplier:

A class named Multiplier is created.

Objects created from this class will have its methods and variables.

🔹 2️⃣ Defining the Constructor __init__

def __init__(self):

    self.value = 1

__init__ runs when an object is created.

self.value = 1 creates an instance variable named value.

So when an object is created:

value = 1

🔹 3️⃣ Defining the __call__ Method

def __call__(self):

__call__ is a special method.

It allows the object to be called like a function.

Example:

m() → calls m.__call__()

🔹 4️⃣ Updating the Instance Variable

self.value *= 3

This means:

self.value = self.value * 3

So the value triples each time the method is called.

🔹 5️⃣ Returning the Updated Value

return self.value

After multiplying the value, the updated value is returned.

🔹 6️⃣ Creating an Object

m = Multiplier()

An instance m of class Multiplier is created.

Constructor runs:

self.value = 1

🔹 7️⃣ Calling the Object

print(m(), m(), m())

Because of __call__, this is equivalent to:

print(m.__call__(), m.__call__(), m.__call__())

Python executes them from left to right.

🔁 Step-by-Step Execution

Step 1️⃣

m()

value = 1 * 3

value = 3

Return:

3

Step 2️⃣

m()

value = 3 * 3

value = 9

Return:

9

Step 3️⃣

m()

value = 9 * 3

value = 27

Return:

27

✅ Final Output

3 9 27

400 Days Python Coding Challenges with Explanation