Python Coding challenge - Day 749| What is the output of the following Python Code?

 

Code Explanation:

1. Importing deque

from collections import deque

deque (double-ended queue) comes from Python’s collections module.

It is like a list but optimized for fast appends and pops from both left and right.

2. Creating a deque

dq = deque([1, 2, 3])

Initializes a deque with elements [1, 2, 3].

Current state of dq:

deque([1, 2, 3])

3. Adding to the Left

dq.appendleft(0)

.appendleft(value) inserts a value at the beginning (left side).

After this line, dq becomes:

deque([0, 1, 2, 3])

4. Adding to the Right

dq.append(4)

.append(value) inserts a value at the end (right side).

After this line, dq becomes:

deque([0, 1, 2, 3, 4])

5. Converting to List & Printing

print(list(dq))

list(dq) converts the deque into a regular list.

Output will be:

[0, 1, 2, 3, 4]

Final Output

[0, 1, 2, 3, 4]

500 Days Python Coding Challenges with Explanation