python __setattr__和__getattr__

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

http://www.2cto.com/kf/201507/413971.html

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'], ...)

索引式访问属性