Queue Using List

linked_queue.py

class Node(object):
    def __init__(self,value=None, pointer=None):
        self.value = value
        self.pointer=None
        
class LinkedQueue(object):
    def __init__(self):
        self.head=None
        self.tail=None
        self.count=0
        
    def isEmpty(self):
        return not bool(self.head)
    
    def dequeue(self):
        if self.head:
            value=self.head.value
            self.count -=1
            return value
        else:
            print("Queue is Empty")
            
    def enqueue(self,value):
        node=Node(value)
        
        if not self.head:
            self.head=node
            self.tail=node
        else:
            if self.tail:
                self.tail.pointer=node
            self.tail=node
        self.count +=1
    
    def size(self):
        return self.count

    def peek(self):
        return self.head.value

    def print(self):
        node=self.head
        while node:
            print(node.value, end='')
            node=node.pointer
        print()