Python Coding challenge - Day 760| What is the output of the following Python Code?

 

Code Explanation:

1) from collections import deque

Imports the deque (double-ended queue) class from Python’s collections module.

deque allows fast appends and pops from both ends (left and right).

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

Creates a new deque initialized with the list [1, 2, 3].

So, dq starts as:

deque([1, 2, 3])

3) dq.append(4)

Adds 4 to the right end of the deque.

Now dq is:

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

4) dq.appendleft(0)

Adds 0 to the left end of the deque.

Now dq is:

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

5) dq.pop()

Removes and returns the rightmost element (4) from the deque.

After popping:

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

6) dq.popleft()

Removes and returns the leftmost element (0) from the deque.

After popleft:

deque([1, 2, 3])

7) print(list(dq))

Converts the deque into a normal Python list and prints it.

Output:

[1, 2, 3]

Final Output:

[1, 2, 3]

500 Days Python Coding Challenges with Explanation