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Re: Dealing with Lists

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On 10/9/2013 17:08, stas poritskiy wrote:

> Greetings to all!
>
> i ran into a little logic problem and trying to figure it out.
>
> my case is as follows:
>
> i have a list of items each item represents a Group 
>
> i need to create a set of nested groups,
>
> so, for example:
>
> myGroups = ["head", "neck", "arms", "legs"]
>
> i need to get them to be represented like this:
> (if you can imaging a folder structure)
>
> head
>   |_> neck
>         |_> arms
>               |_>legs

I don't know what's meant by that  |_>  symbol.  If it's really supposed
to be like subdirectories, there'd be a name associated with the
sublist.  In which case you'd probably want dicts, not lists.

So I'd have to guess you want something like:

["head", ["neck", ["arms", ["legs"]]]]

To turn your list into that one, I'd write something like (untested):

def chop_up(mylist):
    if len(mylist) == 1:
        return mylist
    return [mylist[0], chop_up(mylist[1:])]

I suspect your real problem is totally different, but this was an
interesting exercise.

-- 
DaveA

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Thread

Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-10 14:08 -0700
  Re: Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-10 14:10 -0700
  Re: Dealing with Lists matt.komyanek@gmail.com - 2013-09-10 14:31 -0700
  Re: Dealing with Lists Dave Angel <davea@davea.name> - 2013-09-10 21:51 +0000
    Re: Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-10 15:11 -0700
      Re: Dealing with Lists Roy Smith <roy@panix.com> - 2013-09-10 18:30 -0400
      Re: Dealing with Lists Dave Angel <davea@davea.name> - 2013-09-10 22:32 +0000
  Re: Dealing with Lists Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-11 02:14 +0000
    Re: Dealing with Lists Dave Angel <davea@davea.name> - 2013-09-11 02:24 +0000
      Re: Dealing with Lists Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-11 03:13 +0000
        Re: Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-10 20:44 -0700
        Re: Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-10 20:52 -0700
          Re: Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-11 07:47 -0700
            Re: Dealing with Lists stas poritskiy <stascrash@gmail.com> - 2013-09-11 07:57 -0700
              Re: Dealing with Lists Peter Otten <__peter__@web.de> - 2013-09-11 18:17 +0200

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