对python迭代器的理解

# 构建迭代器
actions = ['点赞','投币','收藏']
actions_iterator = iter(actions)
# 多次迭代
action = next(actions_iterator)
print(action)
action = next(actions_iterator)
print(action)
action = next(actions_iterator)
print(action)
action = next(actions_iterator)
print(action)

iterator = iter(actions)
while True:
    try:
        print(next(iterator))
    except StopIteration:
        print('迭代结束')
        break

Black_List = ['白嫖','取关']
class SuIterator:
    def __init__(self,actions):
        self.actions = actions
        self.index = 0 #初始化索引下标
    def __next__(self):
        while self.index < len(self.actions):
            action = self.actions[self.index]
            self.index += 1 #更新索引下标
            if action in Black_List:
                continue
            elif '币' in action:
                return  action*2
            else:
                return action
        raise  StopIteration
actions = ['点赞', '投币', '收藏']
SuziIterator = SuIterator(actions)
while True:
    try:
        print(next(SuziIterator))
    except StopIteration:
        break