Duncan Booth <[EMAIL PROTECTED]> writes:
> > d = dict(default=0)
> > d['x'] += 3
> >
> > more elegant than
> >
> > d = {}
> > d.withdefault(0)
> > d['x'] += 3
> >
> Well you could have:
>
> d = dict.withdefault(0)
>
> but then you may have to start with an empty dictionary. What happens if
> you need to change default for different uses?
It might be nice to have something like:
d = {}
...
d.withdefault(0)['x'] += 3
d.withdefault would have to construct some special object whose
__iadd__ did the right thing to make this happen.
This would also let you do stuff like:
d = {}
d0 = d.withdefault(0) # can similarly make d1, d2, etc.
...
d0['x'] += 3
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