Python的C扩展套用模板

Extest1.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

int fac(int n)
{
    if (n<2) return (1);
    return (n)*fac(n-1);

}

char *reverse(char *s)
{

    register char t,*p=s,*q=(s+(strlen(s)-1));
    while (p<q)
    {
        t=*p;
        *p++ = *q;
        *q--= t;
    }
    return s;
}

int test()
{
    char s[BUFSIZ];
    printf("4的阶乘为%d\n",fac(4));
    printf("8的阶乘为%d\n",fac(8));
    printf("12的阶乘为%d\n",fac(12));

    strcpy(s,"abcdedg");
    printf("反转abcdedg为%s\n",reverse(s));

    strcpy(s,"madam");
    printf("反转madam为%s\n",reverse(s));
    return 0;
}

#include "Python.h"

static PyObject *Extest_fac(PyObject *self,PyObject *args)
{
int num;
if(!PyArg_ParseTuple(args,"i",&num))
    return NULL;
return (PyObject*)Py_BuildValue("i",fac(num));
}

static PyObject *Extest_doppel(PyObject *self,PyObject *args)
{
char *orig_str;
char *dupe_str;
PyObject *retval;
if(!PyArg_ParseTuple(args,"s",&orig_str))
    return NULL;
retval=(PyObject*)Py_BuildValue("ss",orig_str,dupe_str=reverse(strdup(orig_str)));
free(dupe_str);
return retval;
}

static PyObject *Extest_test(PyObject *self,PyObject *args)
{
test();
return (PyObject*)Py_BuildValue("");
}

static PyMethodDef ExtestMethods[]={
{"fac",Extest_fac,METH_VARARGS},
{"doppel",Extest_doppel,METH_VARARGS},
{"test",Extest_test,METH_VARARGS},
{NULL,NULL},
};

//void initExtest()
//{
//Py_InitModule("Extest",ExtestMethods);
//}

static struct PyModuleDef Extest =
{
    PyModuleDef_HEAD_INIT,
    "Extest", /* name of module */
    "",          /* module documentation, may be NULL */
    -1,          /* size of per-interpreter state of the module, or -1 if the module keeps state in global variables. */
    ExtestMethods
};

PyMODINIT_FUNC PyInit_Extest(void)
{
    return PyModule_Create(&Extest);
}

 

setup.py

from distutils.core import setup, Extension

MOD = 'Extest'
setup(name=MOD, ext_modules=[Extension(MOD, sources=['Extest1.c'])])

 

python setup.py build     编译

 

python setup.py install    安装