Cython - Example

Example

Cython files have a .pyx extension. At its most basic, Cython code looks exactly like Python code. However, whereas standard Python is dynamically typed, in Cython, types can optionally be provided, allowing for improved performance, allowing loops to be converted into C loops where possible. For example:

def primes(int kmax): # The argument will be converted to int or raise a TypeError cdef int n, k, i # These variables are declared with C types. cdef int p # Another C type. result = # A Python type. if kmax > 1000: kmax = 1000 k = 0 n = 2 while k < kmax: i = 0 while i < k and n % p != 0: i = i + 1 if i == k: p = n k = k + 1 result.append(n) n = n + 1 return result

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