Philipp Heuser <philipp@achtziger.de> writes:
I am trying to return an array from C to Python. Since it is of variable size,
return Py_BuildValue("[f,f,f]", array[0], array[1], array[2]);
does not help. How do I do that?
You can do it like you'd do it in Python: get an empty list, append array elements to it in a loop, and return the resulting list when you're done. Since you're coding it in C, it might make sense to attempt to be a bit more efficient and preallocate the list to exactly the needed size.
PyObject *lst = PyList_New(array_len); if (!lst) return NULL; for (i = 0; i < array_len; i++) { PyObject *num = PyFloat_FromDouble(array[i]); if (!num) { Py_DECREF(lst); return NULL; } PyList_SET_ITEM(lst, i, num); // reference to num stolen } return lst;