Queue Implementation

def enqueue(queue, item):
    queue.append(item)

def dequeue(queue):
    if any(queue):
        print("Item De-queued : ", queue.pop(0))
    else : print("[WARNING] Underflow!!!")

def peek(queue):
    if any(queue):
        for i in range(len(queue)):
            if i == 0:
                print(queue[i], " <== FRONT")
            elif i == len(queue)-1 :
                print(queue[i], " <== REAR")
            else: print(queue[i], end="\n")
    else: print("[WARNING] Queue is EMPTY!!!")

def main():
    queue = []

    print("The Queue is Empty now..\nPlease Enter 5 items into it...")

    for i in range(5):
        inp = input("Enter an Item : ")
        queue.append(inp)

    print("[SUCCESS] 5 Items Successfully added to it.")
    print("\nPlease Enter the Operation that you want to do on it...")

    while True:
        print("\n1. Enqueue\n2. Dequeue\n3. Peek\n4. Display Queue\n5. Exit")

        choice = int(input("Enter the Choice (Number only) : "))

        if choice == 1:
            item = input("Enter the Item to be pushed : ")
            enqueue(queue, item)
            print("[SUCCESS] Item Successfully En-queued into the queue.")
        elif choice == 2 : dequeue(queue)
        elif choice == 3 : peek(queue)
        elif choice == 4 :
            for i in queue : print(i)
        elif choice == 5 :
            print("Exiting...")
            break
        else : print("[ERROR] Invalid Choice")
main()