Bruno Desthuilliers <[EMAIL PROTECTED]> wrote:
> David Isaac wrote:
> >> Alan Isaac wrote:
> >>> I have a subclass of dict where __getitem__ returns None rather than
> >>> raising KeyError for missing keys. (The why of that is not important
> > for
> >>> this question.)
> >
> > "Bruno Desthuilliers" <[EMAIL PROTECTED]> wrote:
> >> Well, actually it may be important... What's so wrong with d.get('key')
> >> that you need this behaviour ?
> >
> > I want to use the mapping with string interpolation.
> >
> Well, this makes sens... But then why not use a plain dict to collect
> data, and wrap it in a special one just before using it for
> interpolation ? ie:
Using a single container (and being able to modify and use it fluidly)
is simply handier. That's what defaultdict in Python 2.5 is for, btw.
Alex
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