[Python-ideas] Where should grouping() live

[Greg Ewing]

Steven D'Aprano wrote:
> I propose that a better name which indicates the non-lazy nature of this 
> function is *grouped* rather than grouping, like sorted().

+1

> As for where it belongs, perhaps the collections module is the least 
> worst fit.

But then there's the equally strong purist argument that it's
not a data type, just a function.

Unless we *make* it a data type. Then not only would it fit
well in collections, it would also make it fairly easy to do
incremental grouping if you really wanted that.

Usual case:

    g = groupdict((key(val), val) for val in things)

Incremental case:

    g = groupdict()
    for key(val), val in things:
       g.add(key, val)
       process_partial_grouping(g)

-- 
Greg