迭代器实现斐波那契数列

#Author : Kelvin
#Date : 2019/1/22 20:02
class Fi:
    def __init__(self):
        self.a=1
        self.b=1
    def __iter__(self):
        return self
    def __next__(self):
        if self.b>100:
            raise StopIteration("out of range")
        self.a,self.b=self.b,self.a+self.b
        return self.a
import time
f=Fi()
for i in f:
    print(i)
    time.sleep(1)