KeyError without [] harmful?

[A. Lloyd Flanagan]

jjl at pobox.com (John J. Lee) wrote in message news:<87n0hryf8y.fsf at pobox.com>...
> Sometimes I have methods that work rather like dictionary access, but
> whose class for one reason or another can't sensibly be given a real
> mapping interface (with __getitem__ etc).
> 
<missing stuff>
> 
> Strictly, I suppose it should raise ValueError if a dict lookup in
> there fails, but part of me wants to just leave it at that and let the
> KeyErrors propagate.  Is that a wicked thought?

Doesn't bother me.  As long as the object "looks like" a dictionary I
think KeyError is appropriate.