class Queue(object):
def __init__(self):
self._linkedList = LinkedList()
def enqueue(self, value):
self._linkedList.insert(value)
def dequeue(self):
if self.size() == 0:
raise IndexError
else:
return self._linkedList.pop()
def size(self):
return self._linkedList.size()
def display(self):
return self._linkedList.display()
def __init__(self):
self._linkedList = LinkedList()