Extending Python with Go - Part 1

newmath.c

#include <Python.h>

static PyObject *sum(PyObject *self, PyObject *args) {
    const long a, b;
    if (!PyArg_ParseTuple(args, "LL", &a, &b))
        return NULL;
    return PyLong_FromLong(a + b);
}

static PyMethodDef MathMethods[] = {
    {"sum", sum, METH_VARARGS, "Add two numbers."},
    {NULL, NULL, 0, NULL}
};

static struct PyModuleDef newmathmodule = {
    PyModuleDef_HEAD_INIT, "newmath", NULL, -1, MathMethods
};

PyMODINIT_FUNC PyInit_newmath(void) {
    return PyModule_Create(&newmathmodule);
}