python __getitem__, __setitem__ 实现属性的索引式存取

class MyDictionary(object):
    """docstring for MyDictionary"""

    kv = {}

    def __init__(self):
        super(MyDictionary, self).__init__()

    def __getitem__(self, key):
        return self.kv[key]

    def __setitem__(self, key, value):
        self.kv[key] = value

md = MyDictionary()
# 像操作字典一样操作属性，这样就可以实现动态的属性存取了，屌了
# 当然一般的直接使用"."操作就搞定了
md['name'] = 'mark'
print('{0}'.format(md['name']))