[Python-Dev] New type objects and PyObject_New

Thomas Heller thomas.heller@ion-tof.com
Tue, 9 Apr 2002 22:06:22 +0200

From: "Martin v. Loewis" <martin@v.loewis.de>
> "Thomas Heller" <thomas.heller@ion-tof.com> writes:
> > It seems possible to create new type objects still with
> > PyObject_New() instead of calling the type object.
> > Is this a bug?
> Not sure what you are asking: I assume you are *not* asking about new
> type objects (as created by typeobject.c:type_new), but instead about
> instance of newstyle classes (i.e. instance of type objects).
> Why would you then think that using PyObject_New is a bad thing?

IIUC, PyObject_New doesn't call the tp_new, tp_alloc, and tp_init slots.
So, the new object probably will be in an invalid state, may be
allocated by an allocator not compatible with the tp_dealloc slot?

> Regards,
> Martin