In the interest of furthering the discussion, here are two past threads on similar suggestions:
[Python-Dev] Half-baked proposal: * (and **?) in assignments http://mail.python.org/pipermail/python-dev/2002-November/030349.html [Python-ideas] Javascript Destructuring Assignment http://mail.python.org/pipermail/python-ideas/2007-March/000284.html - Chris Rebert On 5/1/07, Christian Heimes <[EMAIL PROTECTED]> wrote: > Neville Grech Neville Grech wrote: > > This reminds me a lot of haskell/prolog's head/tail list splitting. Looks > > like a good feature. > > Agreed! > > a*=range(5) > > hmmn maybe in such a case, whenever there is the * operator, the resulting > > item is always a list/tuple, like the following: > > a=[[0,1,2,3,4]] ? > > Did you mean *a = range(5)? > The result is too surprising for me. I would suspect that *a = range(5) > has the same output as a = range(5). > > >>> *b = (1, 2, 3) > >>> b > (1, 2, 3) > > >>> a, *b = (1, 2, 3) > >>> a, b > 1, (2, 3) > > >>> *b, c = (1, 2, 3) > >>> b, c > (1, 2), 3 > > > >>> a, *b, c = (1, 2, 3) > >>> a, b, c > 1, (2,), 3 > > But what would happen when the right side is too small? > >>> a, *b, c = (1, 2) > >>> a, b, c > 1, (), 2 > > or should it raise an unpack exception? > > This should definitely raise an exception > >>> a, *b, c, d = (1, 2) > > Christian > > _______________________________________________ > Python-3000 mailing list > Python-3000@python.org > http://mail.python.org/mailman/listinfo/python-3000 > Unsubscribe: > http://mail.python.org/mailman/options/python-3000/cvrebert%40gmail.com > _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
