使用C语言扩展Python3。
在Python3中正确调用C函数。
1. 文件demo.c
#include <Python.h> // c function
static PyObject *
demo_system(PyObject *self, PyObject *args) {
const char *command;
int sts;
if (!PyArg_ParseTuple(args, "s", &command))
return NULL;
sts = system(command);
return PyLong_FromLong(sts);
} static PyObject *
demo_hello(PyObject *self, PyObject *args) {
PyObject *name, *result;
if (!PyArg_ParseTuple(args, "U:demo_hello", &name))
return NULL;
result = PyUnicode_FromFormat("Hello, %S!", name);
return result;
} static PyObject *
demo_chinese(PyObject *self, PyObject *args) {
char *name;
int age;
if (!PyArg_ParseTuple(args, "si", &name, &age))
return NULL;
// printf("%d\n", age);
char total[];
memset(total, , sizeof(total));
strcat(total, "strcat() 函数用来连接字符串：");
strcat(total, "tset");
PyObject *result = Py_BuildValue("s", total);
return result;
} // method table
static PyMethodDef DemoMethods[] = {
{"system", // python method name
demo_system, // matched c function name
METH_VARARGS, /* a flag telling the interpreter the calling
convention to be used for the C function. */
"I guess here is description." }, {"hello", demo_hello, METH_VARARGS, "I guess here is description." },
{"chinese", demo_chinese, METH_VARARGS, NULL },
{NULL, NULL, , NULL} /* Sentinel */
}; // The method table must be referenced in the module definition structure.
static struct PyModuleDef demomodule = {
PyModuleDef_HEAD_INIT,
"demo", /* name of module */
NULL, /* module documentation, may be NULL */
-, /* size of per-interpreter state of the module,
or -1 if the module keeps state in global variables. */
DemoMethods
}; // The initialization function must be named PyInit_name()
PyMODINIT_FUNC
PyInit_demo(void)
{
return PyModule_Create(&demomodule);
}
2. hello.py
import demo
print("---------------------------")
status = demo.system("ls -l")
print("---------------------------")
hi = demo.hello("Sink")
print(hi)
print("---------------------------")
hi = demo.chinese("Sink", 2014)
print(hi)
print("---------------------------")
3. setup.py
from distutils.core import setup, Extension
module1 = Extension('demo',
sources = ['demo.c'])
setup (name = 'Demo hello',
version = '1.0',
description = 'This is a demo package by Sink',
ext_modules = [module1])