Cython 0.16 C++ Demo - Gists · GitHub

Skip to content Search Gists Search Gists All gists Back to GitHub Sign in Sign up Sign in Sign up Dismiss alert {{ message }}

Instantly share code, notes, and snippets.

npinto/.gitignore Created August 1, 2012 23:40 Show Gist options

• Download ZIP

• Star 0 (0) You must be signed in to star a gist
• Fork 0 (0) You must be signed in to fork a gist

• Embed Select an option
  • Embed Embed this gist in your website.
  • Share Copy sharable link for this gist.
  • Clone via HTTPS Clone using the web URL.

  No results found

  Learn more about clone URLs Clone this repository at <script src="https://gist.github.com/npinto/3231603.js"></script>
• Save npinto/3231603 to your computer and use it in GitHub Desktop.

Code Revisions 3 Embed Select an option

• Embed Embed this gist in your website.
• Share Copy sharable link for this gist.
• Clone via HTTPS Clone using the web URL.

No results found

Learn more about clone URLs Clone this repository at <script src="https://gist.github.com/npinto/3231603.js"></script> Save npinto/3231603 to your computer and use it in GitHub Desktop. Download ZIP Cython 0.16 C++ Demo Raw .gitignore This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

*.so

_demo.cpp

build

Raw _demo.pyx This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

# distutils: language = c++

# distutils: sources = demo.cpp

cdef extern from "demo.h" namespace "demo":

cdef int test(float*, int)

import numpy as np

cimport numpy as cnp

def func(cnp.ndarray[cnp.float32_t, ndim=1] arr,

size=1,

):

assert arr.dtype == 'float32'

ptr = arr.data

return test(<float*>arr.data, <Py_ssize_t>size)

Raw demo.cpp This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

#include <iostream>

#include "demo.h"

using namespace std;

int demo::test(float* arr, int size)

{

int i;

for(i=0; i < size; ++i)

cout << i << ":" << ((float*)arr)[i] << endl;

return i;

}

Raw demo.h This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

namespace demo {

int test(float* arr, int size);

}

Raw setup.py This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

from distutils.core import setup

from distutils.extension import Extension

from Cython.Distutils import build_ext

import numpy as np

setup(

ext_modules=[

Extension("_demo",

sources=["_demo.pyx", "demo.cpp"],

language="c++",

include_dirs=[np.get_include()],

),

],

cmdclass={'build_ext': build_ext}

)

import _demo

arr = np.random.randn(10).astype('f')

print _demo.func(arr, size=len(arr))

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment You can’t perform that action at this time.