how to kill dictionary entry

[Bjorn Pettersen]

> From: dsavitsk [mailto:dsavitsk at e-coli.net]
>
> i have a daemon process running that keeps track of 
> connections to it in a
> dictionary.  when a client disconnects i set the dictionary 
> value = None,
> but the key persists.  is there a way to get rid of it 
> totally? for example,
> in the code below, i want a[1] and a[2] to throw the same error.
> 
> >>> a = {}
> >>> a[1] = None
> >>> print a[1]
> None
> >>> print a[2]
> Traceback (innermost last):
>   File "<interactive input>", line 1, in ?
> KeyError: 2

del a[1]

-b