Iterator Example - Fibonacci Sequence¶
Question¶
Example of an iterator generating Fibonacci sequence
Solution¶
class fibnum:
def __init__(self):
self.fn1 = 2
self.fn2 = 1
def next(self):
self.fn1, self.fn2, oldfn2 = self.fn1+self.fn2, self.fn1, self.fn2
return oldfn2
def __iter__(self):
return self
def main():
f = fibnum()
for i in f:
print i
if i > 20: break
if __name__ == '__main__':
main()