Question about accessing class-attributes.

[Bjorn Pettersen]

> From: Michele Simionato [mailto:mis6 at pitt.edu] 
> 
> "Bjorn Pettersen" <BPettersen at NAREX.com> wrote in message 
> news:<mailman.1051832523.2752.python-list at python.org>...

[ class, and instance instantiation...]

> This is also the way I understand how class instantiation works. Maybe
> we are both right (or both wrong ;)

I'm fairly sure the parts I listed are correct from reading the C code.

> > are you saying simply:
> > 
> >    definition("super class of C with respect to S") ::= 
> >       S.  mro  [index(C)+1]
> >
> 
> Yes.

Why? What practical benefit would this possibly possess? Let's say I do:

  sc = superclass(C,S)

what can I do with sc? Specifically,

  sc.a != super(C,S).a

and

  sc.a(S, ...) != super(C,S).a(...)

in fact the only thing I can think of that it can be used for is
recreating S.__mro__[index(C)+1:], which is in fact a useful concept
(see super context in the pseudo code I posted).

[pseudocode for super, and attribute lookup semantics...]

> Can you post actual code instead of BNF-like pseudocode, please ? 
> I would like to see a real implementation, if possible.

Hmm... Why? (I can't see how implementation details would do anything
but obfuscate the issues)... You're asking me to implement a significant
part of an interpreter, because you don't like to read pseudo-code? Why
don't we try the other way first? You tell me what's unclear, and I'll
clarify.

-- bjorn