[Twisted-web] Menu flattening

[Justin Johnson]

This seems to do what I want.  I should probably rethink this though,
since dict's aren't ordered.

def flatten_menu(menu_items):
    if isinstance(menu_items, dict):
        html_menu = ul[
            [ (li[k], [flatten_menu(i) for i in menu_items[k]]) \
                for k in menu_items.keys() if k]
        ]
    else:
        html_menu = ul[ li[menu_items] ]
    return html_menu




On Thu, 11 Dec 2003 09:35:48 -0600, "Justin Johnson"
<justinjohnson@fastmail.fm> said:
> Hi,
> 
> I'm trying to write a method that creates a menu given the following
> information.
> 
> menu_items = {
>     "A": [ "a", "b", "c" ],
>     "B": [ "d", "e", "f" ],
>     "C": [ "g", "h", {"i": ["x", "y", "z"]} ],
> }
> 
> This dict contains the hierarchy of menus.  Eventually I'll add another
> list as input that indicates what is currently selected so the menus will
> expand and collapse as appropriate.
> 
> selected_menu_items = ["C","i"]
> 
> I wrote the following method which displays s simple unordered list from
> the dictionary.
> 
> def flatten_menu(menu_items_dict):
>     html_menu = "<ul>"
>     for k in menu_items_dict.keys():
>         html_menu += "<li>%s</li>" % k
>         html_menu += "<ul>"
>         for i in menu_items_dict[k]:
>             if isinstance(i, dict):
>                 html_menu += flatten_menu(i)
>             else:
>                 html_menu += "<li>%s</li>" % i
>         html_menu += "</ul>"
>     html_menu += "</ul>"
>     return html_menu
> 
> Now I'm trying to implement it as a stan tree.  But since I can't
> separate the starting and ending tags in stan I'm not sure how to
> implement this.  This seems a bit too complex for list comprehension.
> 
> Any ideas?
> 
> Thanks.
> -Justin
> 
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