通过为dict添加__setattr__和__getattr__, 可以属性的语法访问dict的元素

class Storage(dict):    def init(self, *args, **kw):        dict.__init__(self, *args, **kw)    # 为dict添加属性访问符    def __getattr__(self, key):        return self[key]    def __setattr__(self, key, value):        self[key] = value    def __delattr__(self, key):        del self[key]if __name__ == '__main__':    data = {'name': 'mark', 'age': 18}    datasrc=Storage(data)    print(datasrc.name, ...)    print(datasrc['age'], ...)