Re: [Python-Dev] PEP 469: Restoring the iterkeys/values/items() methods

Stephen J. Turnbull wrote:
> Benjamin Peterson writes:> >  > > I suppose there's no way to get the compiler to both make "for x in d">  > > work as above, and make "for k, v in d" be equivalent to Python 2's>  > > "for k, v in d.iteritems()"?> > it would change the meaning of currently correct> programs, so it's a non-starter.

Maybe what's wanted is a function analogous to enumerate() for
mappings instead of sequences. Picking a semi-arbitrary name
for now:

    for k, v in tabulate(d):
       ...

It could be special-cased to recognise dicts and do the appropriate
thing for the Python version concerned. If it doesn't recognise the
type, it would fall back to a generic implementation like

    for k in d:
       v = d[k]:
          ...

-- 
Greg
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