队列实现(Python)

'''
队列 Queue
先进先出
'''

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

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

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

    # 出队列
    def dequeue(self):
        return self.items.pop()

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