myModule.c

#include <Python.h>

int Cfib(int n){
	if (n < 2)
		return n;
	return Cfib(n-1) + Cfib(n-2);
}

static PyObject* fib(PyObject* self, PyObject* args){
	int n;

	if (!PyArg_ParseTuple(args, "i", &n))
		return NULL;

	return Py_BuildValue("i", Cfib(n));
}

static PyObject* version(PyObject* self){
	return Py_BuildValue("s", "Version 1.0");
}

static PyMethodDef myMethods[] = {
	{"fib", fib, METH_VARARGS, "Calculates the fibbonacci number."},
	{"version", (PyCFunction)version, METH_NOARGS, "oops."},
	{NULL, NULL, 0, NULL}
};

static struct PyModuleDef myModuleModuleDef = {
	PyModuleDef_HEAD_INIT,
	"myModule",
	"",
	-1,
	myMethods
};


PyMODINIT_FUNC PyInit_myModule(void){
	return PyModule_Create(&myModuleModuleDef);
}