Queue

from collections import deque


class Queue:
    def __init__(self):
        self.queue = deque()

    def enqueue(self, item):
        self.queue.append(item)
        print(f'Enqueued {item} to queue')

    def dequeue(self):
        if not self.is_empty():
            removed_item = self.queue.popleft()
            print(f'Dequeued {removed_item} from queue')

        else:
            print('Queue is empty')
            return None

    def front(self):
        if not self.is_empty():
            print(f'Front element is {self.queue[0]}')
            return self.queue[0]
        else:
            print('Queue is empty')
            return None

    def is_empty(self):
        return len(self.queue) == 0

    def size(self):
        return len(self.queue)


my_queue = Queue()
my_queue.enqueue('A')
my_queue.enqueue('B')
my_queue.enqueue("C")
my_queue.front()
my_queue.dequeue()
my_queue.dequeue()
my_queue.dequeue()
my_queue.dequeue()