#include <Python.h>
 
PyObject *hello( PyObject *self, PyObject *args, PyObject *kwargs)
{
    char *who;
    static char *keywords[] = {"who", NULL};
 
    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", keywords, &who))
        return NULL;
    return PyUnicode_FromFormat("Hello, %s", who);
}
 
static PyMethodDef example_methods[] = 
{
    { "hello", (PyCFunction)hello, METH_VARARGS|METH_KEYWORDS, "hello(who) -- return \"Hello who\"" },
    { NULL, 0, 0, NULL }
};
static struct PyModuleDef example_module = {
   PyModuleDef_HEAD_INIT,
   "example",   /* name of module */
   NULL, /* module documentation, may be NULL */
   -1,       /* size of per-interpreter state of the module,
                or -1 if the module keeps state in global variables. */
   example_methods
};
 
PyMODINIT_FUNC
PyInit_example(void)
{
    return PyModule_Create(&example_module);
}