(python study) C Module for using in python , in Visual Studio

Firstly, I describe to make C module in Visual Studio.

And introduce using distutils -> http://feelmare.blogspot.kr/2014/02/python-study-c-module-for-using-in_11.html

open visual studio

make project -> win32 console application

check DLL, Empty project on setting page

make new .c file and set property 

select Include directories and Library directories on the VC++ Directories page.

In my case, My installed python is located 

Include -> C:\Python33_32\include

Library -> C:\Python33_32\libs  (Caution, not LIB folder)

Notice, my compile option is release, because I have only release version lib(python32.lib),

Python32_d.lib file is not support default. 

If you compile by debug version, you rebuild python source code to debug version by CMake.

http://www.python.org/ftp/python/3.2/Python-3.2.tar.bz2

programing this source code and compile~!

...

#include "Python.h"

#pragma comment(lib, "python33.lib")          

static PyObject *
 spam_strlen(PyObject *self, PyObject *args)
{
 const char * str = NULL;
 int len = 0; 

 if(!PyArg_ParseTuple(args, "s", &str))
  return NULL;

 //main source code
 len = strlen(str);

 return Py_BuildValue("i", len);
} 

static PyMethodDef SpamMethods[] = { 
 {"strlen", spam_strlen, METH_VARARGS, "count a string length."},
 {NULL, NULL, 0, NULL} //represent end of array
};

static struct PyModuleDef spammodule = {
 PyModuleDef_HEAD_INIT,
 "spam", //name of module
 "It is test module.", //description
 -1,
 SpamMethods
};

PyMODINIT_FUNC PyInit_spam(void)
{
 return PyModule_Create( &spammodule);
}

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rename ~.dll to spam.pyd
If module name is not matched, cannot use module, error occurred when run in python.

copy spam.pyd into python\LIB folder

In the python, programing following source and run~!

...

import spam
print( spam.strlen( "Hello world") )

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