lesson12_ear_16_17_1

class Queue:
    def __init__(self):
        self.items = []

    def isEmpty(self):
        return self.items == []

    def enqueue(self, item):
        self.items.insert(0,item)

    def dequeue(self):
        return self.items.pop()

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

q = Queue()
print q.size()
print q.isEmpty()
q.enqueue(8.4)
q.enqueue(18)
print q.dequeue()
print q.size()