Python Coding challenge - Day 1109| What is the output of the following Python Code?

 

Code Explanation:

1️⃣ Defining the Class

class A:

Explanation

A class named A is created.

It will have special string representation methods.

2️⃣ Defining __str__

def __str__(self):

    return "STR"

Explanation

__str__ defines human-readable representation.

Used when:

print(a)

str(a)

3️⃣ Defining __repr__

def __repr__(self):

    return "REPR"

Explanation

__repr__ defines official / developer representation.

Used in:

lists

debugging

interactive shell

4️⃣ Creating Object

a = A()

Explanation

Creates an instance a of class A.

5️⃣ Printing Inside List

print([a])

Explanation ⚠️ IMPORTANT

When printing a list:

Python uses __repr__, NOT __str__

👉 So internally:

repr(a)

Which returns:

"REPR"

📤 Final Output

['REPR']

Book: 500 Days Python Coding Challenges with Explanation