python迭代器

--迭代器
class SkillIterator:
    def __init__(self,data):
        self.__data=data
        self.__index = -1
    def __next__(self):
        if self.__index < len(self.__data)-1:
            raise  StopIteration()
        return  self.__data[self.__index]

class SkillManager:
    def __init__(self):
        self.skills = []
    def add_skills(self,skill):
         self.__skills.append(skill)
    def __iter__(self):
        return SkillIterator(self.__skills)
dict01 = {"唐僧":23,'悟空':29,'八戒':60}
iterator = dict01.__iter__()
while True:
    try:
        item = iterator.__next__()
        print(item,dict01[item])
    except StopIteration:
        break