lass?Recipe: ????def?__init__(self): ????????self.set_default_Recipe() ????????return ????def?set_default_Recipe(self): ????????self.recipes?=?{"cheese?omelet":{"eggs":2,"milk":1,"cheese":1}, ????????????????????????"mushroom?omelet":{"eggs":2,"milk":1,"cheese":1,"mushroom":1}, ????????????????????????"onion?omelet":{"eggs":2,"milk":1,"cheese":1,"onion":1}} ????????return?self.recipes ????def?get(self,name): ????????try: ????????????recipe?=?self.recipe[name] ????????????return?recipe ????????except?KeyError?: ????????????return?False如下運(yùn)行：a?=?Recipe >>>?a.get("banana")然后報(bào)錯(cuò)：Traceback?(most?recent?call?last): ??File?"<pyshell#16>",?line?1,?in?<module> ????a.get("banana") TypeError:?get()?missing?1?required?positional?argument:?'name'self 應(yīng)該是實(shí)例，前面的a 不就是嗎，又為什么說我還缺一個(gè)參數(shù)呢求教！