Python extension module with variable number of arguments

Question

I am trying to figure out how in C extension modules to have a variable (and maybe) quite large number of arguments to a function.

Reading about PyArg_ParseTuple it

Answer 1

I had used something like this earlier. It could be a bad code as I am not an experienced C coder, but it worked for me. The idea is, *args is just a Python tuple, and you can do anything that you could do with a Python tuple. You can check http://docs.python.org/c-api/tuple.html .

int
ParseArguments(unsigned long arr[],Py_ssize_t size, PyObject *args) {
    /* Get arbitrary number of positive numbers from Py_Tuple */
    Py_ssize_t i;
    PyObject *temp_p, *temp_p2;


    for (i=0;i

I was calling this function like this:

static PyObject *
function_name_was_here(PyObject *self, PyObject *args)
{
    Py_ssize_t TupleSize = PyTuple_Size(args);
    Py_ssize_t i;
    struct bigcouples *temp = malloc(sizeof(struct bigcouples));
    unsigned long current;

    if(!TupleSize) {
        if(!PyErr_Occurred()) 
            PyErr_SetString(PyExc_TypeError,"You must supply at least one argument.");
        free(temp);
        return NULL;
    }

    unsigned long *nums = malloc(TupleSize * sizeof(unsigned long));

    if(!ParseArguments(nums, TupleSize, args)){
        /* Make a cleanup and than return null*/
        return null;
    }