[Pyrex] Weak references to Pyrex extension types

[Matthias Baas]

Hi,

as far as I can tell Pyrex doesn't support creating extension types that 
support weak references (I haven't found it in the manual and when I tried 
it out it just didn't work). From reading the Python Library Reference 
(section 3.3.3 "Weak References in Extension Types") it doesn't sound 
particularly difficult to support weak referencing. So is there any chance 
to get this into Pyrex in the near future? Greg?
Is there any disadvantage in making *all* Pyrex extension types support 
weak references? If not, then there's no new keyword or anything necessary 
but all extension types could automatically support weak references.

- Matthias -