【Python】使用多个迭代器

如果要达到多个迭代器的效果，__iter__()只需替迭代器定义新的状态对象，而不是返回self

 class SkipIterator:
     def __init__(self, wrapped):
         self.wrapped = wrapped
         self.offset = 0

     def __next__(self):
         if self.offset >= len(self.wrapped):
             raise StopIteration
         else:
             item = self.wrapped[self.offset]
             self.offset+=2
             return item

 class SkipObject:
     def __init__(self, wrapped):
         self.wrapped = wrapped

     def __iter__(self):
         return SkipIterator(self.wrapped)

 if __name__ == '__main__':
     hhh = 'hahaha'
     skipper = SkipObject(hhh)
     for i in skipper:
         print(i)

     I = iter(skipper)
     print(next(I), next(I), next(I))

参考资料：Python学习手册