Re: Building lists

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From	Ian Kelly <ian.g.kelly@gmail.com>
Date	Mon, 20 Oct 2014 14:45:19 -0600
Subject	Re: Building lists
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On Mon, Oct 20, 2014 at 2:23 PM, Seymore4Head
<Seymore4Head@hotmail.invalid> wrote:
> On Mon, 20 Oct 2014 13:58:46 -0600, Ian Kelly <ian.g.kelly@gmail.com>
> wrote:
>
>>On Mon, Oct 20, 2014 at 1:49 PM, Seymore4Head
>><Seymore4Head@hotmail.invalid> wrote:
>>> For starters I would like to know if you can make a single item list
>>> and then turn it into a 2 item list.  Is there a command for that?
>>
>>You mean like this?
>>
>>>>> the_list = ['first_item']
>>>>> the_list.append('second_item')
>>>>> the_list
>>['first_item', 'second_item']
>
>
> a=(1,2,3)
> b=("Red", "Green", "Blue")
> c=("a"."b,"c")
>
> d=(1,red,a 2,green,b 3,blue,c)
>
> Something like that.

Those are tuples, not lists. Are you trying to create a list of tuples
from a, b, and c? If so, then zip does what you want:

>>> d = list(zip(a, b, c))
>>> d
[(1, 'Red', 'a'), (2, 'Green', 'b'), (3, 'Blue', 'c')]

Or do you want all those elements merged into a single list?

>>> d = list(sum(zip(a, b, c), ()))
>>> d

[1, 'Red', 'a', 2, 'Green', 'b', 3, 'Blue', 'c']

Thread

Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 14:10 -0400
  Re: Building lists sohcahtoa82@gmail.com - 2014-10-20 11:18 -0700
    Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 14:21 -0400
      Re: Building lists sohcahtoa82@gmail.com - 2014-10-20 11:33 -0700
        Re: Building lists Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-10-20 20:55 +0100
  Re: Building lists MRAB <python@mrabarnett.plus.com> - 2014-10-20 20:40 +0100
    Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 15:49 -0400
      Re: Building lists Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-20 13:58 -0600
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 16:23 -0400
          Re: Building lists Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-20 14:45 -0600
            Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 16:55 -0400
          Re: Building lists Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-10-20 21:47 +0100
      Re: Building lists Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-10-20 20:57 +0100
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 16:24 -0400
      Re: Building lists Denis McMahon <denismfmcmahon@gmail.com> - 2014-10-20 22:40 +0000
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 18:44 -0400
      Re: Building lists Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-10-21 10:55 +1100
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 20:05 -0400
      Re: Building lists Larry Hudson <orgnut@yahoo.com> - 2014-10-21 00:11 -0700
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-21 08:54 -0400
      Re: Building lists Larry Hudson <orgnut@yahoo.com> - 2014-10-21 00:40 -0700
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-21 08:55 -0400
    Re: Building lists Denis McMahon <denismfmcmahon@gmail.com> - 2014-10-20 22:30 +0000
      Re: Building lists MRAB <python@mrabarnett.plus.com> - 2014-10-20 23:57 +0100
  Re: Building lists John Gordon <gordon@panix.com> - 2014-10-20 20:48 +0000
    Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 17:25 -0400
      Re: Building lists Ian Kelly <ian.g.kelly@gmail.com> - 2014-10-20 15:34 -0600
      Re: Building lists Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-10-20 21:31 -0400
        Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-21 08:55 -0400
  Re: Building lists Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-10-21 10:54 +1300
    Re: Building lists Seymore4Head <Seymore4Head@Hotmail.invalid> - 2014-10-20 17:57 -0400
  Re: Building lists Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-10-20 21:27 -0400

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