"Phil Thompson" <[EMAIL PROTECTED]> writes: >>> Questions... >>> >>> 1. What is the reason why it doesn't go via tp_getattro? >> >> Because it wouldn't work if it did? I'm not sure what you're >> suggesting here. > > I'm asking for an explanation for the current implementation. Why wouldn't > it work if it got the attribute via tp_getattro?
Well, using type->tp_getattro is just different to looking in tp_dict -- it finds metamethods, for example. Hmm. Well, I'm fairly sure there is a difference, I'm not sure I can explain it right now :( >>> 2. A possible workaround is to subvert the ma_lookup function of the >>> type >>> dictionary after creating the type to do something similar to what my >>> tp_getattro function is doing. [...] > Yes, having looked in more detail at the dict implementation I really > don't want to go there. Good :) >>> 4. Am I missing a more correct/obvious technique? (There is no need to >>> support classic classes.) >> >> Hum, I can't think of one, I'm afraid. >> >> There has been some vague talk of having a tp_lookup slot in >> typeobjects, so >> >> PyDict_GetItem(t->tp_dict, x); >> >> would become >> >> t->tp_lookup(x); >> >> (well, ish, it might make more sense to only do that if the dict >> lookup fails). > > That would be perfect. I can't Google any reference to a discussion - can > you point me at something? Well, most of the discussion so far has been in my head :) There was a little talk of it in the thread "can we stop pretending _PyType_Lookup is internal" here and possibly on pyobjc-dev around the same time. I'm not that likely to work on it soon -- I have enough moderately complex patches to core Python I'm persuading people to think about :-/. >> For now, not being lazy seems your only option :-/ (it's what PyObjC >> does). > > Not practical I'm afraid. I think I can only document that super doesn't > work in this context. Oh well. I can't even think of a way to make it fail reliably... Cheers, mwh -- Java sucks. [...] Java on TV set top boxes will suck so hard it might well inhale people from off their sofa until their heads get wedged in the card slots. --- Jon Rabone, ucam.chat _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
