Hi all,
Of what I heard Python 2.3 now allow creation of new types in C with
slots.
Is there somewhere some documentation on this, or at least an example ?
Thanks a lot
Boris 7 1788
Boris Boutillier wrote: Hi all,
Of what I heard Python 2.3 now allow creation of new types in C with slots. Is there somewhere some documentation on this, or at least an example ?
I'm not sure what you mean by "with slots" in this context. Creating
new types is well documented at: http://www.python.org/doc/current/api/newTypes.html
and descriptors, assuming that might be what you mean by 'slots',
at http://users.rcn.com/python/download/Descriptor.htm (all the
examples there are in Python, but it should be easy for you to
translate them into C).
Alex
Alex Martelli <al***@aleax.it> writes: Boris Boutillier wrote:
Hi all,
Of what I heard Python 2.3 now allow creation of new types in C with slots. Is there somewhere some documentation on this, or at least an example ?
I'm not sure what you mean by "with slots" in this context. Creating new types is well documented at:
http://www.python.org/doc/current/api/newTypes.html
and descriptors, assuming that might be what you mean by 'slots', at http://users.rcn.com/python/download/Descriptor.htm (all the examples there are in Python, but it should be easy for you to translate them into C).
I would guess he means this: http://www.python.org/sf/696193
and I would also be interested in an example.
Thomas
Thomas Heller wrote:
... Of what I heard Python 2.3 now allow creation of new types in C with slots.
... I would guess he means this:
http://www.python.org/sf/696193
i.e. METAtypes (types whose instances are types) with '__slots__' ...?
and I would also be interested in an example.
Sorry, I've never written a metatype in C -- always in Python, almost
invariably inheriting from the built-in type.
"Normal" C types don't _need_ __slots__ of course, since __slots__'s
effect (avoiding a per-instance dict) is most easily achieved by
simply leaving the tp_dictoffset field at 0 (as most built-in types
do, save for those who DO want a per-instance dict -- functions and
modules come to mind).
Alex
That was not clear.
By slots, I mean the equivalent of '__slots__' in pure python,
ie adding some attribute as offsets at the end of the C description of a
Type.
And in fact what I am really looking for is how to describe '__slots__' in the C
description of a Metaclass.
Hope this make it a bit clearer.
Boris
On Fri, 17 Oct 2003 14:58:44 +0000, Alex Martelli wrote: Boris Boutillier wrote:
Hi all,
Of what I heard Python 2.3 now allow creation of new types in C with slots. Is there somewhere some documentation on this, or at least an example ?
I'm not sure what you mean by "with slots" in this context. Creating new types is well documented at:
http://www.python.org/doc/current/api/newTypes.html
and descriptors, assuming that might be what you mean by 'slots', at http://users.rcn.com/python/download/Descriptor.htm (all the examples there are in Python, but it should be easy for you to translate them into C).
Alex
Thanks Thomas, I think this is exactly what I was looking for.
Boris
On Fri, 17 Oct 2003 17:20:49 +0200, Thomas Heller wrote: Alex Martelli <al***@aleax.it> writes:
Boris Boutillier wrote:
Hi all,
Of what I heard Python 2.3 now allow creation of new types in C with slots. Is there somewhere some documentation on this, or at least an example ?
I'm not sure what you mean by "with slots" in this context. Creating new types is well documented at:
http://www.python.org/doc/current/api/newTypes.html
and descriptors, assuming that might be what you mean by 'slots', at http://users.rcn.com/python/download/Descriptor.htm (all the examples there are in Python, but it should be easy for you to translate them into C).
I would guess he means this:
http://www.python.org/sf/696193
and I would also be interested in an example.
Thomas
"Boris Boutillier" <bo**************@arteris.net> writes: That was not clear. By slots, I mean the equivalent of '__slots__' in pure python, ie adding some attribute as offsets at the end of the C description of a Type. And in fact what I am really looking for is how to describe '__slots__' in the C description of a Metaclass.
Either you or I are confused: do you want the slots to appear on the
*type* or on *instances of the type*?
Cheers,
mwh
--
In general, I'd recommend injecting LSD directly into your temples,
Syd-Barret-style, before mucking with Motif's resource framework.
The former has far lower odds of leading directly to terminal
insanity. -- Dan Martinez
[Thomas] I would guess he means this:
http://www.python.org/sf/696193
and I would also be interested in an example.
[Boris] Thanks Thomas, I think this is exactly what I was looking for.
For an alternative, which also works on Python 2.2, you can take a look
into the sources for ctypes.
Thomas This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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