迭代器-斐波那契数列

使用迭代器实现斐波那契数列

class Finacci(object):
    def __init__(self,num):
        self.num = num
        self.a = 1
        self.b = 1
        self.current_index=0
    def __iter__(self):  #定义迭代器
        return self
    def __next__(self):
        if self.current_index<self.num:
            data = self.a
       13             self.a,self.b=self.b,self.a+self.b
            self.current_index+=1
            return data
        else:
            raise StopIteration

if __name__ == '__main__':
    fib = Finacci(5)
    # val = next(fib)
    for value in fib:
        print(value)