WeakValueDictionary

[Mark Hammond]

Ken Seehof wrote:

>  >>> sys.version
> '2.1.1 (#20, Jul 20 2001, 01:19:29) [MSC 32 bit (Intel)]'
>  >>> import weakref
>  >>> d = weakref.WeakValueDictionary()
>  >>> d['z']
> Traceback (most recent call last):
>   File "<input>", line 1, in ?
>   File "C:\PYTHON21\lib\weakref.py", line 35, in __getitem__
>     o = self.data.get(key)()
> TypeError: object of type 'None' is not callable
> 
> Shouldn't this be raising KeyError instead of TypeError?

Probably :)

While we are at it, I would like to see the ability to have a weak-ref 
to None - this would allow me to remove special casing for None in the 
places I have used weakrefs to date.

But-that-is-a-different-problem ly,

Mark.