The Don Beaudry/Jim Fulton hack

[abrahams at mediaone.net]

In article <slrn86mqvl.8r1.neelk at brick.cswv.com>,
  neelk at alum.mit.edu wrote:
> Dave Abrahams <abrahams at mediaone.net> wrote:
> >
> > But as you can see, you can't set the __class__ attribute of an
instance to
> > anything other than a class. So what have I missed? How am I
supposed to get
> > this to work "without writing C code"?
>
> Read GvR's essay, "Metaclass Programming in Python 1.5" at
>
>     http://www.python.org/doc/essays/metaclasses/
>
> I have to admit that you are more hardcore than me -- I never bothered
> looking at the C source once I had found this essay. :)

Thanks! I forgot that you can also put an attribute calle '__class__'
on an object of type class, not just of type instance. Duh.

Now I'm trying to get MESS to compile and have run into a couple of
seemingly insurmountable obstacles: parts of the Python API used to
implement MESS seem to be missing (?!). They are:
  PyAccess_Check
  PyAccess_AsValue
  PyAccess_SetValue
  PyAccess_SetOwner

Does anybody have a clue where these bits can be found (or explained -
I'd happily adjust the MESS code if I had a clue what it was doing)?

TIA,
Dave


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