[Python-Dev] How to suppress instance __dict__?

[David Abrahams]

martin@v.loewis.de (Martin v. L=F6wis) writes:

> David Abrahams <dave@boost-consulting.com> writes:
>
>> Yes, I can define __getstate__, __setstate__, and __getinitargs__ (the
>> only one that can actually do any work, since ints are immutable),
>> but I was wondering if there's a more straightforward way to suppress
>> the instance __dict__ in the derived classes.
>
> Setting tp_dictoffset to 0 might help.=20

AFAICT I don't get to do that, since as I wrote:

       I am generating extension types derived from a type which is
       derived from int 'int' by calling the metaclass
                              ^^^^^^^^^^^^^^^^^^^^^^^^

> However, I'm unsure what consequences this has; read the source.

Unfortunately, this is one of the twistiest areas of the Python
source, so while I could struggle through it I'm hoping there's
someone around here who knows the answer off the top of his benevolent
Dutch head <wink>

--=20
Dave Abrahams
Boost Consulting
www.boost-consulting.com