python 手写队列

#encoding=utf8
class MQueue:
    def __init__(self):
        self.data = []

    def get(self):
        if self.data.__len__()>0:
            return self.data.pop()
        else:
            return None

    def put(self, item):
        if not self.isExist(item):
            self.data.insert(0, item)

    def remove(self, obj, attr='name'):#移除某个属性等于obj的所有对象
        while -1 != self.indexOf(obj):
            self.data.pop(self.indexOf(obj))

    def size(self):
        return self.data.__len__()

    def isEmpty(self):
        return 0 == self.data.__len__()

    def indexOf(self, obj, attr='name'):#查询对象indexOf(obj)，查询元素indexOf(obj.str,obj.attr)
        isDict = isinstance(obj, dict)
        for i in range(self.data.__len__()):
            if (isDict and self.data[i] == obj) or (not isDict and obj == self.data[i][attr]):
                return i
        return -1

    def isExist(self, obj):
        return not -1 == self.indexOf(obj)

    def getData(self):
        return self.data

if __name__ == '__main__':
    q = MQueue()
    q.put({'name': '路人甲'})
    q.put({'name': '路人1'})
    q.put({'name': '路人2'})
    q.put({'name': '路人3'})
    q.put({'name': '路人甲'})
    print(q.size())
    q.remove('路人甲')
    print(q.size())
    print(q.isExist('路人1'))