linux c内嵌执行python

下载python，安装

编写代码test1.c

#include <Python.h>
int main(int argc, char* argv[]) {
    Py_Initialize();
    PyRun_SimpleString("print 'aaaaaaaaaaa'");
    Py_Finalize();
    return 0;
}

编译：

gcc -g test1.c /root/python/lib/libpython2.7.a -I/root/python/include/python2.7 -L/root/python/lib/python2.7/lib-dynload -lm -ldl -pthread -lutil -o test1

执行：./test1

输出：

aaaaaaaaaaa

很多情况下，linux已经默认安装了python，编译命令为：

gcc -g test1.c -I/usr/include/python2.6 -lpython2.6 -lm -ldl -pthread -lutil -o test11

上面时直接在c中硬编码python代码执行，那么怎么执行Python脚本呢：

test2.c

#include <Python.h>

int
main(int argc, char *argv[])
{
    PyObject *pName, *pModule, *pDict, *pFunc;
    PyObject *pArgs, *pValue;
    int i;

    if (argc < 3) {
        fprintf(stderr,"Usage: call pythonfile funcname [args]\n");
        return 1;
    }

    Py_Initialize();
    pName = PyString_FromString(argv[1]);
    /* Error checking of pName left out */

    pModule = PyImport_Import(pName);
    Py_DECREF(pName);

    if (pModule != NULL) {
        pFunc = PyObject_GetAttrString(pModule, argv[2]);
        /* pFunc is a new reference */

        if (pFunc && PyCallable_Check(pFunc)) {
            pArgs = PyTuple_New(argc - 3);
            for (i = 0; i < argc - 3; ++i) {
                pValue = PyInt_FromLong(atoi(argv[i + 3]));
                if (!pValue) {
                    Py_DECREF(pArgs);
                    Py_DECREF(pModule);
                    fprintf(stderr, "Cannot convert argument\n");
                    return 1;
                }
                /* pValue reference stolen here: */
                PyTuple_SetItem(pArgs, i, pValue);
            }
            pValue = PyObject_CallObject(pFunc, pArgs);
            Py_DECREF(pArgs);
            if (pValue != NULL) {
                printf("Result of call: %ld\n", PyInt_AsLong(pValue));
                Py_DECREF(pValue);
            }
	    else {
                Py_DECREF(pFunc);
                Py_DECREF(pModule);
                PyErr_Print();
                fprintf(stderr,"Call failed\n");
                return 1;
            }
        }
        else {
            if (PyErr_Occurred())
                PyErr_Print();
            fprintf(stderr, "Cannot find function \"%s\"\n", argv[2]);
        }
        Py_XDECREF(pFunc);
        Py_DECREF(pModule);
    }
    else {
        PyErr_Print();
        fprintf(stderr, "Failed to load \"%s\"\n", argv[1]);
        return 1;
    }
    Py_Finalize();
    return 0;
}

multiply.py

#!/usr/bin/python
#Filename: multiply.py
def multiply(a,b):
    print "Will compute"
    c=0
   # for i in range(0,a)
   #     c=c+b
    return c
multiply(3,2)

编译：

gcc -g test2.c -I/usr/include/python2.6 -lpython2.6 -lm -ldl -pthread -lutil -o test2

把multiply.py脚本放到系统目录下/usr/lib/python2.6

执行：./test2 multiply multiply