/******************************************************************** 
 * A simple C extension module for Python, called "hello"; compile
 * this into a ".so" on python path, import and call hello.message;
 ********************************************************************/

#include <Python.h>
#include <string.h>

/* module functions */
static PyObject *                                 /* returns object */
message(PyObject *self, PyObject *args)           /* self unused in modules */
{                                                 /* args from python call */
    char *fromPython, result[64];
    if (! PyArg_Parse(args, "(s)", &fromPython))  /* convert Python -> C */
        return NULL;                              /* null=raise exception */
    else {
        strcpy(result, "Hello, ");                /* build up C string */
        strcat(result, fromPython);               /* add passed Python string */
        return Py_BuildValue("s", result);        /* convert C -> Python */
    }
}

/* registration table  */
static struct PyMethodDef hello_methods[] = {
    {"message", message, 1},       /* method name, C func ptr, always-tuple */
    {NULL, NULL}                   /* end of table marker */
};
,
/* module initializer */
void inithello()                       /* called on first import */
{                                      /* name matters if loaded dynamically */
    (void) Py_InitModule("hello", hello_methods);   /* mod name, table ptr */
}