lialie> The list has a random length.
lialie> Do you mean to do it in this way?
lialie> use PyTuple_Size(args), in a loop
lialie> use PyTuple_GetItem(args, i)
lialie> or
lialie> use PyArg_VaParse?
Sketch (that means off-the-top-of-my-head, untested, 99.9% guaranteed
incorrect in some fashion):
static PyObject *
my_list_method(PyObject *self, PyObject *args) {
PyListObject *list = NULL;
PyTupleObject *point = NULL;
int list_len;
double *points = NULL;
double x, y;
if (PyArg_ParseTuple(args, "O!", &PyList_Type, &list) == NULL)
return NULL;
list_len = PyList_GetSize(list);
points = PyMem_Alloc(list_len * 2 * sizeof(double));
if (points == NULL)
goto fail;
for (i = 0; i < list_len; i++) {
point = PyList_GetItem(list, i)
if (point == NULL || !PyTuple_Check(point))
goto fail;
if (Py_ArgParseTuple(point, "(dd)", &x, &y) == NULL)
goto fail;
Py_DECREF(point);
points[i*2] = x;
points[i*2+1] = y;
/* do your thing with your list of floats here */
...
PyMem_Free(points);
Py_DECREF(list);
Py_INCREF(None); /* or whatever makes sense */
return None;
fail:
Py_XDECREF(list);
Py_XDECREF(point);
if (points != NULL)
PyMem_Free(points);
return NULL;
}
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