"Michael Spencer" <[EMAIL PROTECTED]> wrote:
> I could imagine a class: accumulator(mapping, default, incremetor) such that:
> >>> my_tally = accumulator({}, 0, operator.add)
> or
> >>> my_dict_of_lists = accumulator({}, [], list.append)
> or
> >>> my_dict_of_sets = accumulator({}, set(), set.add)
>
> then: .accumulate(key, value) "does the right thing" in each case.
>
> a bit cumbersome, because of having to specify the accumulation method, but
> avoids adding methods to, or sub-classing dict
>
> Michael
That's the equivalent of reduce() for mappings. Given the current trend of
moving away from
traditional functional features (lambda,map,filter,etc.), I would guess it's
not likely to become
mainstream.
George
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