Write a python program to implement Queues.

 Write a python program to implement Queues.

from collections import deque

class Queue:

    def __init__(self):

        self.queue = deque()

    def enqueue(self, item):

        """Adds an item to the end (rear) of the queue."""

        self.queue.append(item)

        print(f"Enqueued: {item}")

    def dequeue(self):

        """Removes and returns the front item. Returns None if empty."""

        if self.is_empty():

            print("Queue Underflow: Cannot dequeue from an empty queue.")

            return None

        return self.queue.popleft()

    def front(self):

        """Returns the front item without removing it."""

        if self.is_empty():

            return None

        return self.queue[0]

    def is_empty(self):

        """Checks if the queue is empty."""

        return len(self.queue) == 0

# Usage

q = Queue()

q.enqueue("A")

q.enqueue("B")

print(f"Dequeued: {q.dequeue()}")  # Returns "A"

print(f"Front element: {q.front()}") # Returns "B"