On Mar 21, 3:45 pm, k <yaukwan...@gmail.com> wrote:
> Thank you all.
> Ondrej,
> I tried again and I think the structure can be kept as is,
> only that I the mutable default set([]) should be avoided since
> it is assigned one per class.
You could also use frozenset(), which is immutable.
Vinzent
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