[Python-Dev] Class destructor

[Nick Maclaren]

"Phillip J. Eby" <pje at telecommunity.com> wrote:
>
> Well, you could use a custom metaclass with a tp_dealloc or whatever.

Yes, I thought of that, but a custom metaclass to provide one callback
is pretty fair overkill!

> But I just mainly meant that a PyCObject is almost as good as a weakref
> for certain purposes -- i.e. it's got a pointer and a callback.

Ah.  Yes.  Thanks for suggesting it - if it is the simplest way, I
may as well do it.

> You could of course also use weak references, but that's a bit more
> awkward as well.

Yes.  And they aren't a technology I have used (in Python), so I would
have to find out about them.  Attributes etc. I have already played
with.


Regards,
Nick Maclaren,
University of Cambridge Computing Service,
New Museums Site, Pembroke Street, Cambridge CB2 3QH, England.
Email:  nmm1 at cam.ac.uk
Tel.:  +44 1223 334761    Fax:  +44 1223 334679