Python Coding challenge - Day 341| What is the output of the following Python Code?

 

Code Explanation:

from collections import deque

from collections import deque: This line imports the deque class from Python's built-in collections module. A deque (double-ended queue) is a specialized container from the collections module, and it allows you to efficiently append and pop elements from both ends.

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

d = deque([1, 2, 3]): This line creates a deque object named d and initializes it with a list [1, 2, 3]. A deque is similar to a list, but it is optimized for fast appending and popping elements from both ends (the left and the right).

The resulting deque will look like this:

deque([1, 2, 3])

d.append(4)

d.append(4): This line adds the value 4 to the right end (or the back) of the deque. The append() method is used to add an element to the right side of the deque. After this operation, the deque will look like this:

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

print(d)

print(d): This prints the current contents of the deque. After the append(4) operation, the deque contains the elements [1, 2, 3, 4]. The output will be:

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

Final Output:

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