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Re: Nested iteration?

References <kl6a1f$k2l$1@panix2.panix.com> <CAPTjJmpKR8z7Cub1WaurmsuugNgCvPYFdh9WYqJd_1OTfpLw6Q@mail.gmail.com> <CALwzidk6qz4qHOFWYqv_cDEtjbhvS_kjG0vXJZmeB0dJ07doTQ@mail.gmail.com> <CAHVvXxROqnNt1bwvvQLNNUczGbFDUdZ7yu3=Om3DQHaekzZj-g@mail.gmail.com>
From Joshua Landau <joshua.landau.ws@gmail.com>
Date 2013-04-23 22:41 +0100
Subject Re: Nested iteration?
Newsgroups comp.lang.python
Message-ID <mailman.997.1366753308.3114.python-list@python.org> (permalink)

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On 23 April 2013 22:29, Oscar Benjamin <oscar.j.benjamin@gmail.com> wrote:

> I just thought I'd add that Python 3 has a convenient way to avoid
> this problem with next() which is to use the starred unpacking syntax:
>
> >>> numbers = [1, 2, 3, 4]
> >>> first, *numbers = numbers
>

That creates a new list every time. You'll not want that over
try-next-except if you're doing this in a loop, and on addition (if you
were talking in context) your method will exhaust the iterator in the outer
loop.

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Thread

Nested iteration? roy@panix.com (Roy Smith) - 2013-04-23 11:40 -0400
  Re: Nested iteration? Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-04-23 17:05 +0100
  Re: Nested iteration? Ian Kelly <ian.g.kelly@gmail.com> - 2013-04-23 10:05 -0600
  Re: Nested iteration? Peter Otten <__peter__@web.de> - 2013-04-23 18:15 +0200
  Re: Nested iteration? Chris Angelico <rosuav@gmail.com> - 2013-04-24 02:21 +1000
  Re: Nested iteration? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 16:35 +0000
  Re: Nested iteration? Ian Kelly <ian.g.kelly@gmail.com> - 2013-04-23 10:30 -0600
  Re: Nested iteration? Ian Kelly <ian.g.kelly@gmail.com> - 2013-04-23 10:39 -0600
  Re: Nested iteration? Chris Angelico <rosuav@gmail.com> - 2013-04-24 02:42 +1000
    Re: Nested iteration? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-04-23 16:53 +0000
  Re: Nested iteration? Terry Jan Reedy <tjreedy@udel.edu> - 2013-04-23 16:49 -0400
  Re: Nested iteration? Joshua Landau <joshua.landau.ws@gmail.com> - 2013-04-23 22:14 +0100
  Re: Nested iteration? Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-04-23 22:29 +0100
  Re: Nested iteration? Joshua Landau <joshua.landau.ws@gmail.com> - 2013-04-23 22:41 +0100
  Re: Nested iteration? Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-04-23 23:42 +0100

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