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Recursive lazy fibonacci
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| from itertools import izip, islice | |
| def fibg(): | |
| "Generate an infinite amount of fibonacci numbers" | |
| yield 1 | |
| yield 1 | |
| offset = fibg() | |
| offset.next() | |
| for x, y in izip(offset, fibg()): | |
| yield x + y | |
| def fib(n): | |
| "Return a list of the first n elements of the fibonacci sequence" | |
| return list(islice(fibg(), 0, n)) |
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