Python Coding challenge - Day 1040| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Class

class Counter:

Creates a class named Counter

By default, it inherits from object

🔹 2. Defining a Class Variable

count = 0

count is a class variable

It belongs to the class Counter, not to individual objects

All instances share the same count

📌 Accessed as Counter.count

🔹 3. Defining the __call__ Method

def __call__(self):

__call__ is a magic method

It allows an object to be called like a function

When you write a(), Python internally runs:

a.__call__()

🔹 4. Modifying the Class Variable

Counter.count += 1

Increments the shared class variable

Uses Counter.count (not self.count)

Ensures all objects affect the same counter

🔹 5. Returning the Updated Value

return Counter.count

Returns the current value of the shared counter

🔹 6. Creating the First Object

a = Counter()

Creates an instance a

No __init__ method exists, so nothing else runs

🔹 7. Creating the Second Object

b = Counter()

Creates another instance b

a and b are different objects

Both share the same class variable count

🔹 8. Calling the Objects Like Functions

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

Step-by-step execution:

a() → Counter.count becomes 1

b() → Counter.count becomes 2

a() → Counter.count becomes 3

✅ Final Output

1 2 3

500 Days Python Coding Challenges with Explanation