1 class fib: 2 def __init__(self): 3 self.a, self.b = 0, 1 4 5 def next(self): 6 result = self.b 7 #self.a, self.b = self.b, self.a + self.b 8 self.b, self.a = self.a + self.b, result 9 return result 10 11 seq = fib() 12 i = 0 13 while i < 10: 14 print seq.next() 15 i += 1