Python Coding challenge - Day 1133| What is the output of the following Python Code?

 

Code Explanation:

🔹 1. Class Test Definition

class Test:

✅ Explanation:

A class Test is created.

This class will act as a descriptor (special object controlling attribute access).

🔹 2. __get__ Method (Descriptor Method)

def __get__(self, obj, objtype):

    return 100

✅ Explanation:

__get__ is part of the descriptor protocol.

It is automatically called when the attribute is accessed.

🔍 Parameters:

self → instance of descriptor (Test() object)

obj → instance of class A (i.e., obj)

objtype → class A

✔️ What it does:

Whenever attribute is accessed → returns:

100

🔹 3. Class A Definition

class A:

    x = Test()

✅ Explanation:

Class A is created.

x = Test():

Assigns a descriptor object to class attribute x

So x is NOT a normal variable

It is controlled by Test.__get__

🔹 4. Object Creation

obj = A()

✅ Explanation:

An instance obj of class A is created.

No special initialization here.

🔹 5. Accessing Attribute

print(obj.x)

✅ What happens internally:

Instead of directly returning x, Python does:

Test.__get__(self=Test(), obj=obj, objtype=A)

🔍 Execution:

Calls __get__

Returns:

100

🎯 Final Output

100

 Book:  500 Days Python Coding Challenges with Explanation