Python Coding challenge - Day 1005| What is the output of the following Python Code?

 

Code Explanation:

1. Defining the class

class Box:

This line defines a new class named Box.

A class is a blueprint for creating objects.

2. Class attribute

    x = 5

x is a class variable.

It belongs to the class Box, and every object of Box can access it.

Its value is 5.

3. Special method __getattr__

    def __getattr__(self, name):

        return 99

__getattr__ is a special (magic) method in Python.

It is called only when an attribute is NOT found normally.

Parameters:

self → the current object

name → the name of the attribute being accessed

This method always returns 99, no matter which missing attribute is requested.

4. Creating an object

b = Box()

This creates an instance (object) of the Box class.

b now refers to that object.

5. Printing attributes

print(b.x, b.y)

Let’s break this into two parts:

🔹 b.x

Python looks for x in:

The object b

The class Box

x exists in the class and its value is 5

So b.x → 5

🔹 b.y

Python looks for y in:

The object b

The class Box

y does not exist

Python then calls:

__getattr__(self, "y")

__getattr__ returns 99

So b.y → 99

✅ Final Output

5 99

700 Days Python Coding Challenges with Explanation