Рассмотрим пример строгой типизации с помощью Cython:

def primes(int kmax):

"""Расчет простых чисел с помощью дополнительных ключевых слов Cython """

····cdef int n, k, i

····cdef int p[1000]

····result = []

····if kmax > 1000:

········kmax = 1000

····k = 0

····n = 2

····while k < kmax:

········i = 0

········while i < k and n % p[i]!= 0:

············i = i + 1

········if i == k:

············p[k] = n

············k = k + 1

············result.append(n)

········n = n + 1

····return result