Say I have my object layout defined as:
typedef struct {
PyObject_HEAD
// Other stuff...
} pyfoo;
...and my type definition:
static PyTypeObject pyfoo_T = {
PyObject_HEAD_INIT(NULL)
// ...
pyfoo_new,
};
How do I create a new instance of pyfoo somewhere within my C extension?
Call PyObject_New(), followed by PyObject_Init().
EDIT: The best way is to call the class object, just like in Python itself:
/* Pass two arguments, a string and an int. */
PyObject *argList = Py_BuildValue("si", "hello", 42);
/* Call the class object. */
PyObject *obj = PyObject_CallObject((PyObject *) &pyfoo_T, argList);
/* Release the argument list. */
Py_DECREF(argList);
PyObject_Init().PyTypeObject "derives" from PyObject internally, and an explicit cast is used, there should be no warning. What's your compiler?INCREFed the object it returned, because it just created it and intends to pass ownership to you in the first place. If you also intend to pass ownership of the new object to your caller, you should not DECREF it either. See edcjones.tripod.com/refcount.html for the gory details.
