"This won't work on the derived class since any new attribute will be added in __dict__."
"因为装饰器在模块第一次被读入是由解释程序装入,所以它们的使用必须受限于总体上可以应用的封装器。"
"Since decorators are loaded by the interpreter when the module is first read, their usage should be limited to wrappers that can be generically applied."