Re: De-tupleizing a list

From	Gnarlodious <gnarlodious@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: De-tupleizing a list
Date	2011-04-26 05:19 -0700
Organization	http://groups.google.com
Message-ID	<4cb20ed0-c766-4bd8-8d00-762208d92d14@r33g2000prh.googlegroups.com> (permalink)
References	<8dcab23b-6e38-41d0-9591-ef3cbfdbd589@a21g2000prj.googlegroups.com> <4db6514e$0$29978$c3e8da3$5496439d@news.astraweb.com>

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On Apr 25, 10:59 pm, Steven D'Aprano wrote:

> In Python 3, map becomes lazy and returns an iterator instead of a list,
> so you have to wrap it in a call to list().

Ah, thanks for that tip. Also works for outputting a tuple:
list_of_tuples=[('0A',), ('1B',), ('2C',), ('3D',)]

#WRONG:
(x for (x,) in list_of_tuples)
<generator object <genexpr> at 0x1081ee0>

#RIGHT:
tuple(x for (x,) in list_of_tuples)

Thanks everyone for the abundant help.

-- Gnarlie

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Thread

De-tupleizing a list Gnarlodious <gnarlodious@gmail.com> - 2011-04-25 20:28 -0700
  Re: De-tupleizing a list CM <cmpython@gmail.com> - 2011-04-25 20:42 -0700
    Re: De-tupleizing a list Gnarlodious <gnarlodious@gmail.com> - 2011-04-25 20:52 -0700
  Re: De-tupleizing a list "Littlefield, Tyler" <tyler@tysdomain.com> - 2011-04-25 21:38 -0600
  Re: De-tupleizing a list Philip Semanchuk <philip@semanchuk.com> - 2011-04-25 23:38 -0400
  Re: De-tupleizing a list Paul Rubin <no.email@nospam.invalid> - 2011-04-25 21:08 -0700
    Re: De-tupleizing a list John Connor <john.theman.connor@gmail.com> - 2011-04-25 23:29 -0500
  Re: De-tupleizing a list Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-26 04:59 +0000
    Re: De-tupleizing a list rusi <rustompmody@gmail.com> - 2011-04-25 22:26 -0700
    Re: De-tupleizing a list Gnarlodious <gnarlodious@gmail.com> - 2011-04-26 05:19 -0700
      Re: De-tupleizing a list Algis Kabaila <akabaila@pcug.org.au> - 2011-04-27 04:30 +1000
        Re: De-tupleizing a list Hans Georg Schaathun <hg@schaathun.net> - 2011-04-26 21:11 +0100
          Re: De-tupleizing a list Ethan Furman <ethan@stoneleaf.us> - 2011-04-26 13:37 -0700
            Re: De-tupleizing a list Hans Georg Schaathun <hg@schaathun.net> - 2011-04-26 21:58 +0100
  Re: De-tupleizing a list Raymond Hettinger <python@rcn.com> - 2011-04-26 14:16 -0700
  Re: De-tupleizing a list John Pinner <funthyme@gmail.com> - 2011-04-27 03:56 -0700
    Re: De-tupleizing a list Algis Kabaila <akabaila@pcug.org.au> - 2011-04-28 05:31 +1000

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