Python Coding challenge - Day 1076| What is the output of the following Python Code?

 

Code Explanation:

1. Defining Class A

class A:

Explanation:

This line creates a class named A.

A class is a template used to create objects (instances).

2. Defining Method f

def f(self):

    return "method"

Explanation:

A method named f is defined inside class A.

self refers to the object (instance) that calls the method.

The method returns the string "method".

So initially:

A.f() → "method"

If called through an object:

a.f() → "method"

3. Creating an Object

a = A()

Explanation:

This creates an object a of class A.

The object can access the class method f.

Example:

a.f() → "method"

4. Assigning a New Function to a.f

a.f = lambda: "instance"

Explanation:

This line creates an instance attribute f for object a.

It assigns a lambda function that returns "instance".

Lambda function:

lambda: "instance"

Important concept:

Instance attributes override class methods with the same name.

So now the object a has:

a.__dict__ = {'f': <lambda>}

Meaning:

a.f → instance function

The class method A.f still exists but is hidden for this object.

5. Calling a.f()

print(a.f())

Explanation:

Python searches attributes in this order:

Instance attributes

Class attributes

Parent classes

Since a already has an instance attribute f, Python uses that instead of the class method.

So Python executes:

lambda: "instance"

Which returns:

"instance"

6. Final Output

instance

900 Days Python Coding Challenges with Explanation