Level 3 : Fibonacci sequence iterator. 


class FibonacciIterator:
    def __init__(self, n):
        self.a, self.b = 0, 1
        self.n = n
        self.count = 0

    def __iter__(self):
        return self

    def __next__(self):
        if self.count >= self.n:
            raise StopIteration
        self.count += 1
        self.a, self.b = self.b, self.a + self.b
        return self.a

it = iter(FibonacciIterator(5))
print(list(it))
Author: SandhyaR | Tags: iterator | 1859+ Python FAQs | Share
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