preference tree like in jdk 1.4

[Stefan Schwarzer]

Hello Michael

Michael Chermside wrote:
> Instead of using an empty function, use something designed specifically
> for holding fields: a class!
> 
>  >>> class Empty:
>         pass
>  >>> pref = Empty()
>  >>> pref.personalData = Empty()
>  >>> pref.personalData.firstName = 'John'
>  >>> pref.personalData.lastName = 'Cleese'
>  >>> pref.windowSettings = Empty()
>  >>> pref.windowSettings.windowA = Empty()
>  >>> pref.windowSettings.windowA.x = 200

Actually, you use instances of the class to store the values. I think,
you meant that anyway, didn't you? :-)

Sometimes classes are used for such a purpose. However, this may cause
problems if you need more than one "container" (like above). Using
class instances is more common, I assume.

Stefan