Hi,
I am trying to add new data attributes to my extension classes from
within a script. I am under the impression that python allows
that implicity
This is the definition of my class
PyTypeObject CmdPlace::PyType =
{
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"Place", /*tp_name*/
sizeof(CmdPlace::PyStruct), /*tp_basicsize*/
0, /*tp_itemsize*/
0, /*tp_dealloc*/
0, /*tp_print*/
0, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash */
0, /*tp_call*/
0, /*tp_str*/
PyObject_GenericGetAttr, /*tp_getattro*/
PyObject_GenericSetAttr, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"CmdPlace", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
CmdPlace::sPyMethods, /* tp_methods */
CmdPlace::sPyMembers, /* tp_members */
CmdPlace::sPyGetSeters, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
};
I call
PyType_Ready(&PyType);
Py_INCREF(&PyType);
to initialize the type, and
PyObject_INIT((PyObject*)&mPyObject, &CmdPlace::PyType);
to initialize an object. Objects of this type are only ever
instantiated from C++. When I evaluate a sript I just add the object as
"MyObject" to the dicitonary passed to Py_Eval... All the
members and methods work fine, but when I do
MyObject.aNewAttribue = 12
I get at an error saying
object has no attribute "aNewAttribue".
I have looked at some of the source code in PyObject_GenericGetAttr and
it turns out that the object has no dictionary. It seens that the
address of the dictionary is computed somehow via tp_dictoffset in the
type object.
Basically my question is, how can I make this work.
Cheers
Jochen
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