On Thu, Aug 17, 2006 at 02:35:11PM +0200, Fredrik Lundh wrote:
> John Machin wrote:
>
> > 1. It's also documented as being the recommended way of filling up a
> > list after PyList_New.
>
> since it doesn't work in any existing Python release, it's hardly
> "recommended".
>
> the Python documen
John Machin wrote:
> 1. It's also documented as being the recommended way of filling up a
> list after PyList_New.
since it doesn't work in any existing Python release, it's hardly "recommended".
the Python documentation has never been formally binding; if the documentation
doesn't match the cod
Fredrik Lundh wrote:
> John Machin wrote:
>
> > Are you suggesting a rework of the manual instead of inserting a X in
> > the offending py_DECREF?
>
> are you suggesting slowing things down just because of a bug in the
> documentation ?
Not explicitly; not intentionally.
> you cannot return an
Jack Diederich wrote:
>> For avoidance of doubt: the change is to use Py_XDECREF, yes/no?
>
> Yes.
not necessarily: the bug is that you're using an uninitialized object in
a context that expects an initialized object. might be a better idea to
raise a SystemError exception.
--
http://mail
Jack Diederich wrote:
> It is handy for functions that take a mutable list as an argument.
an *existing*, and properly *initialized*, mutable sequence. PyList_New
doesn't give you such an object.
--
http://mail.python.org/mailman/listinfo/python-list
John Machin wrote:
> Are you suggesting a rework of the manual instead of inserting a X in
> the offending py_DECREF?
are you suggesting slowing things down just because of a bug in the
documentation ? you cannot return an uninitialized list object to
Python anyway, so there's no need to add
On Wed, Aug 16, 2006 at 05:13:23PM -0700, John Machin wrote:
>
> Jack Diederich wrote:
> > On Wed, Aug 16, 2006 at 03:25:39PM -0700, John Machin wrote:
>
> > > > >
> > > > > Not the OP's problem, but a bug in the manual: example in the chapter
> > > > > that the OP was reading acts as though the
the pointer isn't null) because it expects
> > > to be used that way.
> >
> > PyList_SetItem is not sentient. It expects nothing. Now tell us what
> > the developer was thinking -- certainly not consistency with the
> > documantation. If the Sequence API requires valid
On Wed, Aug 16, 2006 at 03:25:39PM -0700, John Machin wrote:
>
> Jack Diederich wrote:
> > On Wed, Aug 16, 2006 at 02:39:24PM -0700, John Machin wrote:
> > >
> > > Jack Diederich wrote:
> > >
> > > > Changing the PySequence_SetItem to PyList_S
Jack Diederich wrote:
> On Wed, Aug 16, 2006 at 02:39:24PM -0700, John Machin wrote:
> >
> > Jack Diederich wrote:
> >
> > > Changing the PySequence_SetItem to PyList_SetItem and dropping the
> > > DECREF works for me too (PyList functions steal a reference
John Machin wrote:
> Jack Diederich wrote:
>
> > Changing the PySequence_SetItem to PyList_SetItem and dropping the
> > DECREF works for me too (PyList functions steal a reference). I also
> > tried setting the list to length 1, still no dice. The PySequence
> >
On Wed, Aug 16, 2006 at 02:39:24PM -0700, John Machin wrote:
>
> Jack Diederich wrote:
>
> > Changing the PySequence_SetItem to PyList_SetItem and dropping the
> > DECREF works for me too (PyList functions steal a reference). I also
> > tried setting the list to le
Jack Diederich wrote:
> Changing the PySequence_SetItem to PyList_SetItem and dropping the
> DECREF works for me too (PyList functions steal a reference). I also
> tried setting the list to length 1, still no dice. The PySequence
> version segs under 2.4 and 2.5. It segs even whe
On Wed, Aug 16, 2006 at 01:45:44PM -0700, John Machin wrote:
> Bill Pursell wrote:
> > Bill Pursell wrote:
> >
> > Also note that the problem goes away if I replace
> > the call to PySequence_SetItem with:
> > PySequence_SetItem(l, 0, PyInt_FromLong(1L));
Bill Pursell wrote:
> Bill Pursell wrote:
>
> Also note that the problem goes away if I replace
> the call to PySequence_SetItem with:
> PySequence_SetItem(l, 0, PyInt_FromLong(1L));
Are you sure? It should make absolutely no difference.
My experience so far:
1. cra
New(3);
> x = PyInt_FromLong(1L);
>
> if (l == NULL || x == NULL) {
> PyErr_Print();
> exit (EXIT_FAILURE);
> }
> PySequence_SetItem(l, 0, x);
> Py_DECREF(x);
>
> Py_Finalize();
> return EXIT_SUC
) {
PyErr_Print();
exit (EXIT_FAILURE);
}
PySequence_SetItem(l, 0, x);
Py_DECREF(x);
Py_Finalize();
return EXIT_SUCCESS;
}
Unforunately, it doesn't work. It segfaults, and
the error occurs in list_ass_item() when the
Py_DECREF macro is appli
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