如何实现C与python混合编程

Python016

如何实现C与python混合编程,第1张

实现C与python混合编程方法

代码如下:

/* tcpportping.c */

#include <Python.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <netdb.h>

#include <sys/time.h>

/* count time functions */

static double mytime(void)

{

struct timeval tv

if (gettimeofday(&tv, NULL) == -1)

return 0.0

return (double)tv.tv_usec + (double)tv.tv_sec * 1000000

}

static PyObject * /* returns object */

tcpping(PyObject *self, PyObject *args )

{

struct sockaddr_in addr

struct hostent *hp

double time

char*host = NULL

int fd

int port, timeout

if (!PyArg_ParseTuple(args, "sii", &host, &port, &timeout)) /* convert Python ->C */

return NULL /* null=raise exception */

if ((fd = socket(AF_INET, SOCK_STREAM, 0)) <0) {

return Py_BuildValue("d", -1.0) /* convert C ->Python */

}

bzero((char *)&addr, sizeof(addr))

if ((hp = gethostbyname(host)) == NULL) {

return Py_BuildValue("d", -2.0) /* convert C ->Python */

}

bcopy(hp->h_addr, &addr.sin_addr, hp->h_length)

addr.sin_family = AF_INET

addr.sin_port = htons(port)

struct timeval tv

tv.tv_sec = 0

tv.tv_usec = timeout * 1000

double stime = mytime()

if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) <0) {

return Py_BuildValue("d", -3.0) /* convert C ->Python */

}

fd_set read, write

FD_ZERO(&read)

FD_ZERO(&write)

FD_SET(fd, &read)

FD_SET(fd, &write)

if (select(fd + 1, &read, &write, NULL, &tv) == 0) {

close(fd)

return Py_BuildValue("d", -4.0) /* convert C ->Python */

}

double etime = mytime()

time = etime - stime

if (!FD_ISSET(fd, &read) &&!FD_ISSET(fd, &write)) {

close(fd)

return Py_BuildValue("d", -4.0) /* convert C ->Python */

}

close(fd)

return Py_BuildValue("d", time/1000) /* convert C ->Python */

}

/* registration table */

static struct PyMethodDef portping_methods[] = {

{"tcpping", tcpping, METH_VARARGS}, /* method name, C func ptr, always-tuple */

{NULL, NULL} /* end of table marker */

}

/* module initializer */

void inittcpportping( ) /* called on first import */

{ /* name matters if loaded dynamically */

(void) Py_InitModule("tcpportping", portping_methods) /* mod name, table ptr */

}

可以的。

C中内嵌Python

新建立一个工程，首先需要将工作目录设置到Python-3.1.1PCbuild中，以获取到动态库，至于静态库的包含，Include目录的指定，那自然也是少不了的。文件中需要包含Python.h文件，这也是必须的。

接口中

Py_Initialize()

Py_Finalize()

其他的根据需求，再引入相应的python builder 即可