求教：python中类的问题！一下代码一直报错

Question

def __init__(self,kind = "cheese"):         self.set_kind(kind)         return def set_kind(self,kind):      possible_ingredients = self.__known_kinds(kind)     if possible_ingredients == False:         return False     else:         self.kind = kind         self.needed_ingredients = possible_ingredients以上代码都是Omelet类中的函数AttributeError: 'Omelet' object has no attribute '_Omelet__known_kinds'如此报错求助！（鞠躬）def __known_kinds(self,kind):            if kind == "cheese":                return{"eggs":2,"milk":1,"cheese":1}            elif kind == "mushroom":                return{"eggs":2,"milk":1,"cheese":1,"mushroom":2}            elif kind == "onion":                return{"eggs":2,"milk":1,"cheese":1,"onion":1}            else:                return False

Answer 1

代码没有贴全吗？
报错提示缺少known_kind

Answer 2

代码没有贴全吗？
报错提示缺少known_kind