迭代器-斐波那契数列

使用迭代器实现斐波那契数列

 1 class Finacci(object):
 2     def __init__(self,num):
 3         self.num = num
 4         self.a = 1
 5         self.b = 1
 6         self.current_index=0
 7     def __iter__(self):  #定义迭代器
 8         return self
 9     def __next__(self):
10         if self.current_index<self.num:
11             data = self.a
12             self.a=self.b
13             self.b=self.a+self.b
14             self.current_index+=1
15             return data
16         else:
17             raise StopIteration
18 
19 if __name__ == '__main__':
20     fib = Finacci(5)
21     # val = next(fib)
22     for value in fib:
23         print(value)