python迭代器类( 手写)

class Iterator:     #自定义迭代器
    def __init__(self, Iteratorlist) -> None:
        self.iteratorlist = Iteratorlist
        self.index = 0

    def __next__(self):    #复写基类(迭代器)的next函数
        if self.index + 1 > len(self.iteratorlist):
            raise StopIteration()
        item = self.iteratorlist[self.index]
        self.index += 1
        return item

class IteratorList:       #自定义可迭代对象
    def __init__(self, list):
        self.list = list

    def __iter__(self):    #复写基类(可迭代对象的)的iter函数
        return Iterator(self.list)

class People:
    pass

iter_list = IteratorList([People(), People(), People(), People()])

iterator = iter_list.__iter__()

while True:
    try:
        item = iterator.__next__()
        print(item)
    except:
        break