Dealing with Lists

[Dave Angel]

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