Hi,
currently I have a problem understanding Py_BuildValue. I have this code:
static PyObject *function(PyObject *self, PyObject *args) {
PyObject * python_return_value = NULL;
PyObject * dummy = NULL;
double * internal_list;
<snip and forget the rest>
/* converting to python representation */
for (i=0; i < limit; i++) {
dummy = Py_BuildValue("d", internal_list[i]);
if (!dummy) return NULL;
PyList_Append(python_return_value, dummy);
Py_DECREF(dummy); dummy = NULL;
}
return python_return_value
}
This doesn't work. What I see, when invoking the function "function()" in
Python is a list of refcounts, like: [<refcnt 0 at 0x94a29d4>, <refcnt 0 at
0x94a29e4>, ...]. However, if I change the Py_BuildValue-line to be
dummy = Py_BuildValue("i", (int)internal_list[i]);
I do get the 'right' integer return values. Point is that I really would
like to work with Python-floats afterwards.
Any idea where a pitfall might be here?
TIA
Christian
PS Oh, and I tried casting to float and explicitly to double, too. Same
result as without the casts.
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