[Tutor] Tree Ctrl Data Structure - Help, please!

[lauren at protopc.com]

Thanks also for your help!

So taking into account that tree data structures can be created as a
nested tuples...

Do you have any pointers on how to get from here

continent = ["australia", "europe", "america", "asia"]
country = [["spain", "germany", "belgium"], ["united states", "canada"]]
state = ["california", "oregon", "arizona"]

To here:

geo=[
    ("australia", []),
    ("europe",
        [("spain",[]),
         ("germany",[]),
         (belgium",[])]),
    ("north america",
        [("united states",[
            ("california",[]),
            ("oregon",[]),
            ("arizona",[])
            ])
        ]),
        ("canada", []),
    ("asia", [])
    ]

??

Thanks Again!
Lauren


>
> I think the normal way of representing a tree in python would be as
> (value, children) tuples.
>
> In this case, you would have:
>
> geo = [('australia', []), ('europe', [('spain', []), ('germany', []),
> ('belgium', [])]),
>            ('america', [('california', [('los angeles', []), ('san
> francisco', [])]),
>                              ('texas', [('detroit', [])])]),
>            # etc
>           ]
>
> This lets you avoid messy isinstance testing to figure out if you've
> got a value or a list of children.
> (admittedly, it can be hard to keep track of the brackets, but good
> indentation and a monospaced font should help out)
>
> --
> John.