Python Coding challenge - Day 994| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the Base Class

class Base:

A class named Base is defined.

This class will be callable because it defines __call__.

2. Defining __call__ in Base

    def __call__(self, x):

        return x + 1

__call__ allows objects of Base (or its subclasses) to be called like a function.

It takes one argument x.

Returns x + 1.

Example:

Base()(3) → 4

3. Defining the Child Class

class Child(Base):

Class Child inherits from Base.

It automatically gains access to Base.__call__.

4. Overriding __call__ in Child

    def __call__(self, x):

        return super().__call__(x) * 2

This method does two things:

Calls the parent class’s __call__ using super():

super().__call__(x)

Multiplies the result by 2.

5. Creating an Object

c = Child()

An instance c of class Child is created.

Since Child defines __call__, c is callable.

6. Calling the Object

print(c(3))

Step-by-step execution:

c(3) calls:

Child.__call__(c, 3)

Inside Child.__call__:

super().__call__(3) → Base.__call__(3) → 3 + 1 = 4

Result is multiplied:

4 * 2 = 8

7. Final Output

8

✅ Final Answer

✔ Output:

8

700 Days Python Coding Challenges with Explanation