Python Coding challenge - Day 1084| What is the output of the following Python Code?

 

    Code Explanation:

1️⃣ Defining Class Counter

class Counter:

Creates a class named Counter.

Instances of this class will inherit its attributes and methods.

🔹 2️⃣ Defining a Class Variable

count = 0

count is a class variable.

It belongs to the class Counter, not to individual objects.

All objects share the same variable.

Internally:

Counter.count = 0

🔹 3️⃣ Defining the __call__ Method

def __call__(self):

__call__ is a special method.

It allows objects to behave like functions.

Example:

a()  → calls a.__call__()

🔹 4️⃣ Incrementing the Class Variable

Counter.count += 1

This increases the class variable count by 1.

Since it is a class variable, the change is shared across all objects.

🔹 5️⃣ Returning the Updated Value

return Counter.count

After incrementing, the method returns the updated value of count.

🔹 6️⃣ Creating First Object

a = Counter()

Creates an instance a of the class Counter.

🔹 7️⃣ Creating Second Object

b = Counter()

Creates another instance b.

Both a and b share the same class variable count.

🔹 8️⃣ Calling the Objects

print(a(), b(), a())

Because of __call__, this is equivalent to:

print(a.__call__(), b.__call__(), a.__call__())

Step-by-Step Execution

First call

a()

Counter.count = 0 + 1 = 1

Returns:

1

Second call

b()

Counter.count = 1 + 1 = 2

Returns:

2

Third call

a()

Counter.count = 2 + 1 = 3

Returns:

3

✅ Final Output

1 2 3

500 Days Python Coding Challenges with Explanation