blob: ad6190cc75ff2ca55e59d49216f13f0ff23f8fd2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
cdef extern from "C_func_file.c":
# C is include here so that it doesn't need to be compiled externally
pass
cdef extern from "C_func_file.h":
void multiply_by_10_in_C(double *, unsigned int)
import numpy as np
def multiply_by_10(arr): # 'arr' is a one-dimensional numpy array
if not arr.flags['C_CONTIGUOUS']:
arr = np.ascontiguousarray(arr) # Makes a contiguous copy of the numpy array.
cdef double[::1] arr_memview = arr
multiply_by_10_in_C(&arr_memview[0], arr_memview.shape[0])
return arr
a = np.ones(5, dtype=np.double)
print(multiply_by_10(a))
b = np.ones(10, dtype=np.double)
b = b[::2] # b is not contiguous.
print(multiply_by_10(b)) # but our function still works as expected.
|
