override a property

[Robin Becker]

Steven Bethard wrote:
> Robin Becker wrote:
> 
.......
> 
> Can you add the object to be observed as another parameter to the add 
> method?
> 
> py> class ObservableProperty(property):
> ...     def __init__(self, *args, **kwargs):
......
> py> A.x.add(b, obs2)
> py> b.x = 7
> obs2: 7
> 
> Probably "self._observers" should use some sort of weakref dict instead 
> of a regular dict, but hopefully the idea is clear.
> 
> STeVe

yes I think this is what Alex is proposing. It probably means abandoning the 
class based observers entirely otherwise there would have to be a decision on 
whether the instance observers take priority and some argument convention on 
whether the class or the instance was being added to.
-- 
Robin Becker