Uma brincadeira rápida

Um jeito divertido de calcular Fibonacci usando NumPy:

from collections.abc import Callable
from numpy import matrix, long

def fib() -> Callable:
    m = matrix('1, 1; 1, 0', dtype=long)
    
    def fib(n: int) -> long:
        return (m ** n)[0, 0]
    return fib
fib = fib()

Cython

from libc.stdint cimport int64_t
from numpy cimport ndarray
from numpy import matrix, long


cdef:
    ndarray m = matrix('1, 1; 1, 0', dtype=long)


cpdef int64_t fib(int n):
    return (m ** n)[0, 0]

[]’s

[update 2015-11-28]
Código atualizado para Python 3 e versão Cython.
[/update]