Circular Queue

#Circular Queue:

class QueueException(Exception):
    print()
class CircularQueue:
    def __init__(self,size=5):
        self.item=[None]*size
        self.front=0
        self.count=0
    def is_empty(self):
        return self.count==0
    def size(self):
        return self.count
    def enqueue(self,data):
        if self.count==len(self.item):
            self.resize(2*len(self.item))
        i=(self.front+self.count)%len(self.item)
        self.item[i]=data
        self.count+=1
    def dequeque(self):
        if self.is_empty():
            raise QueueException("Queue is empty.")
        x=self.item[self.front]
        self.item[self.front]=None
        self.front=(self.front+1)%len(self.item)
        self.count-=1
    def peek(self):
        if self.is_empty():
            raise QueueException("Queue is empty.")
        return self.item[self.front]
    def display(self):
        print(self.item)
    def resize(self,n):
        old=self.item
        self.item=[None]*n
        i=self.front
        for j in range(self.count):
            self.item[j]=old[i]
            i=(1+i)%len(old)
        self.front=0

if __name__=="__main__":
    queue=CircularQueue()

    while True:
        print("1.Enqueue")
        print("2.Dequeue")
        print("3.Size")
        print("4.Peek")
        print("5.Display")
        print("6.Quit")

        choice=int(input("Enter a choice: "))
        if(choice==1):
            data=int(input("Enter the element: "))
            queue.enqueue(data)
        elif(choice==2):
            popped=queue.dequeque()
            print("Delete elements is: ",popped)
        elif(choice==3):
            s=queue.size()
            print("Size is: ",s)
        elif(choice==4):
            p=queue.peek()
            print("Front is at: ",p)
        elif(choice==5):
            queue.display()
        elif(choice==6):
            break
        else:
            print("Invalid Choice!!")
        print()