Python 斐波那契数列 Iterator 版本

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class Fabonacci(object):       def __init__(self, num):         #fabonni number         self.num = num         self.a = 1         self.b = 1         self.current_index = 0       # __iter__     def __iter__(self):         return self       #__next__     def __next__(self):         #1. judge if exceed         if self.current_index < self.num:             data = self.a             self.a, self.b = self.b, self.a + self.b             self.current_index += 1             print("index = %d, a = %d, b = %d" % (self.current_index, self.a, self.b))             return data         #2. exceed         else:             raise StopIteration     if __name__ == '__main__':     fabo_iteration = Fabonacci(5)     for value in fabo_iteration:     # value = next(fabo_iteration)         print(value)