source: python/vendor/Python-2.6.5/Demo/embed/demo.c

/* Example of embedding Python in another program */

#include "Python.h"

void initxyzzy(void); /* Forward */

main(int argc, char **argv)
{
        /* Pass argv[0] to the Python interpreter */
        Py_SetProgramName(argv[0]);

        /* Initialize the Python interpreter.  Required. */
        Py_Initialize();

        /* Add a static module */
        initxyzzy();

        /* Define sys.argv.  It is up to the application if you
           want this; you can also let it undefined (since the Python 
           code is generally not a main program it has no business
           touching sys.argv...) */
        PySys_SetArgv(argc, argv);

        /* Do some application specific code */
        printf("Hello, brave new world\n\n");

        /* Execute some Python statements (in module __main__) */
        PyRun_SimpleString("import sys\n");
        PyRun_SimpleString("print sys.builtin_module_names\n");
        PyRun_SimpleString("print sys.modules.keys()\n");
        PyRun_SimpleString("print sys.executable\n");
        PyRun_SimpleString("print sys.argv\n");

        /* Note that you can call any public function of the Python
           interpreter here, e.g. call_object(). */

        /* Some more application specific code */
        printf("\nGoodbye, cruel world\n");

        /* Exit, cleaning up the interpreter */
        Py_Exit(0);
        /*NOTREACHED*/
}

/* A static module */

/* 'self' is not used */
static PyObject *
xyzzy_foo(PyObject *self, PyObject* args)
{
        return PyInt_FromLong(42L);
}

static PyMethodDef xyzzy_methods[] = {
        {"foo",         xyzzy_foo,      METH_NOARGS,
         "Return the meaning of everything."},
        {NULL,          NULL}           /* sentinel */
};

void
initxyzzy(void)
{
        PyImport_AddModule("xyzzy");
        Py_InitModule("xyzzy", xyzzy_methods);
}