Python Coding Challenge - Question with Answer (ID -230426)

 

Explanation:

📌 1. List Initialization

x = [1, 2, 3]

A list x is created with elements 1, 2, 3

🔁 2. List Comprehension Overview

[i for i in x if i != x.pop()]

Iterates through each element i in x

Adds i to a new list only if condition is true

⚠️ 3. Role of x.pop()

x.pop():

Removes the last element from x

Returns that removed value

This modifies the list during iteration

🔄 4. Step-by-Step Execution

👉 First iteration

i = 1

x.pop() → removes 3

Check: 1 != 3 → ✅ True

Output list: [1]

Remaining list: [1, 2]

👉 Second iteration

i = 2

x.pop() → removes 2

Check: 2 != 2 → ❌ False

Output list remains: [1]

Remaining list: [1]

👉 Further iteration

List size has changed → iteration becomes unreliable

📤 5. Final Output

[1]

Book: Python for Cybersecurity