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Re: Extracting elements over multiple lists?

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Date Mon, 07 Nov 2011 15:06:25 -0500
From Dave Angel <d@davea.name>
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Subject Re: Extracting elements over multiple lists?
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On 11/07/2011 01:01 PM, JoeM wrote:
> Thanks guys, I was just looking for a one line solution instead of a
> for loop if possible. Why do you consider
>
> [x.remove(x[0]) for x in [a,b,c]]
>
> cheating? It seems compact and elegant enough for me.
>
>
>
> Cheers
Are you considering the possibility that two of these names might 
reference the same list?

a = [42, 44, 6, 19, 48]
b = a
c = b


for x in [a,b,c]:
     x.remove(x[0])

now a will have  [19,48] as its content.



-- 

DaveA

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Thread

Extracting elements over multiple lists? JoeM <josephmeiring@gmail.com> - 2011-11-07 09:12 -0800
  Re: Extracting elements over multiple lists? John Gordon <gordon@panix.com> - 2011-11-07 17:37 +0000
  Re: Extracting elements over multiple lists? Laurent Claessens <moky.math@gmail.com> - 2011-11-07 18:44 +0100
    Re: Extracting elements over multiple lists? JoeM <josephmeiring@gmail.com> - 2011-11-07 10:01 -0800
      Re: Extracting elements over multiple lists? John Gordon <gordon@panix.com> - 2011-11-07 18:22 +0000
        Re: Extracting elements over multiple lists? Terry Reedy <tjreedy@udel.edu> - 2011-11-07 19:06 -0500
      Re: Extracting elements over multiple lists? Peter Otten <__peter__@web.de> - 2011-11-07 19:33 +0100
      Re: Extracting elements over multiple lists? Jean-Michel Pichavant <jeanmichel@sequans.com> - 2011-11-07 19:51 +0100
      Re: Extracting elements over multiple lists? Dave Angel <d@davea.name> - 2011-11-07 15:06 -0500
      Re: Extracting elements over multiple lists? Laurent Claessens <moky.math@gmail.com> - 2011-11-08 08:07 +0100
      RE: Extracting elements over multiple lists? "Prasad, Ramit" <ramit.prasad@jpmorgan.com> - 2011-11-15 17:01 +0000
        Re: Extracting elements over multiple lists? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-15 22:21 +0000
      Re: Extracting elements over multiple lists? Dave Angel <d@davea.name> - 2011-11-15 13:17 -0500
      Re: Extracting elements over multiple lists? Chris Angelico <rosuav@gmail.com> - 2011-11-16 06:53 +1100
        Re: Extracting elements over multiple lists? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-11-15 22:25 +0000
          Re: Extracting elements over multiple lists? Chris Angelico <rosuav@gmail.com> - 2011-11-16 09:54 +1100
    Re: Extracting elements over multiple lists? Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2011-11-07 19:06 +0100

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