迭代器

from collections import Iterator
from collections import Iterable


class Classmate(object):
    def __init__(self):
        self.prev = 0
        self.curr = 1

    # def add(self, name):
    #     ret = self.names.append(name)
    #     return ret

    def __iter__(self):
        return self

    def __next__(self):
        value = self.curr
        self.curr += self.prev
        self.prev = value
        return value


if __name__ == '__main__':
    c = Classmate()