Hi, I have been writing a new C api that can build with both python 2.6 and 3.0
I found that when building with python 2.6, doing "a==b" between 2 different pyrna_struct_Type's would run tp_compare But with python 3.0, "a==b" will always be false and tp_compare function would not even run. The only way to get it to run the tp_compare function was to do "cmp(a, b)" however Id like to be able to use == still. The only way I could get "a==b" to work in python 3.0 was to add a tp_richcompare function which runs tp_compare with Py_CmpToRich() anyway Is this the intended behavior? - if so its important for external C API's to be updated to support this. Included the PyType below with some relevant details. I looked at other Python 3.0 types but could not see why this would happen. // ----snip, // initialized with PyType_Ready if( PyType_Ready( &pyrna_struct_Type ) < 0 ) return NULL; // header definition for BPy_StructRNA typedef struct { PyObject_HEAD /* required python macro */ PointerRNA ptr; int freeptr; /* needed in some cases if ptr.data is created on the fly, free when deallocing */ } BPy_StructRNA; // PyType /*-----------------------BPy_StructRNA method def------------------------------*/ PyTypeObject pyrna_struct_Type = { PyVarObject_HEAD_INIT(NULL, 0) "StructRNA", /* tp_name */ sizeof( BPy_StructRNA ), /* tp_basicsize */ 0, /* tp_itemsize */ /* methods */ ( destructor ) pyrna_struct_dealloc,/* tp_dealloc */ NULL, /* printfunc tp_print; */ NULL, /* getattrfunc tp_getattr; */ NULL, /* setattrfunc tp_setattr; */ ( cmpfunc ) pyrna_struct_compare, /* tp_compare */ ( reprfunc ) pyrna_struct_repr, /* tp_repr */ /* Method suites for standard classes */ NULL, /* PyNumberMethods *tp_as_number; */ NULL, /* PySequenceMethods *tp_as_sequence; */ NULL, /* PyMappingMethods *tp_as_mapping; */ /* More standard operations (here for binary compatibility) */ ( hashfunc )pyrna_struct_hash, /* hashfunc tp_hash; */ NULL, /* ternaryfunc tp_call; */ NULL, /* reprfunc tp_str; */ ( getattrofunc ) pyrna_struct_getattro, /* getattrofunc tp_getattro; */ ( setattrofunc ) pyrna_struct_setattro, /* setattrofunc tp_setattro; */ /* Functions to access object as input/output buffer */ NULL, /* PyBufferProcs *tp_as_buffer; */ /*** Flags to define presence of optional/expanded features ***/ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* long tp_flags; */ NULL, /* char *tp_doc; Documentation string */ /*** Assigned meaning in release 2.0 ***/ /* call function for all accessible objects */ NULL, /* traverseproc tp_traverse; */ /* delete references to contained objects */ NULL, /* inquiry tp_clear; */ /*** Assigned meaning in release 2.1 ***/ /*** rich comparisons ***/ (richcmpfunc)pyrna_struct_richcmp, /* richcmpfunc tp_richcompare; */ /*** weak reference enabler ***/ 0, /* long tp_weaklistoffset; */ /*** Added in release 2.2 ***/ /* Iterators */ NULL, /* getiterfunc tp_iter; */ NULL, /* iternextfunc tp_iternext; */ /*** Attribute descriptor and subclassing stuff ***/ pyrna_struct_methods, /* struct PyMethodDef *tp_methods; */ NULL, /* struct PyMemberDef *tp_members; */ NULL, /* struct PyGetSetDef *tp_getset; */ NULL, /* struct _typeobject *tp_base; */ NULL, /* PyObject *tp_dict; */ NULL, /* descrgetfunc tp_descr_get; */ NULL, /* descrsetfunc tp_descr_set; */ 0, /* long tp_dictoffset; */ NULL, /* initproc tp_init; */ NULL, /* allocfunc tp_alloc; */ pyrna_struct_new, /* newfunc tp_new; */ /* Low-level free-memory routine */ NULL, /* freefunc tp_free; */ /* For PyObject_IS_GC */ NULL, /* inquiry tp_is_gc; */ NULL, /* PyObject *tp_bases; */ /* method resolution order */ NULL, /* PyObject *tp_mro; */ NULL, /* PyObject *tp_cache; */ NULL, /* PyObject *tp_subclasses; */ NULL, /* PyObject *tp_weaklist; */ NULL }; -- - Campbell _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com