Flattening lists

[mk]

Mark Dickinson wrote:
> I often find myself needing a 'concat' method that
> turns a list of lists (or iterable of iterables) into
> a single list;  itertools.chain does this quite nicely.
> But I don't think I've ever encountered a need for the
> full recursive version.


You're most probably right in this; however, my main goal here was 
finding 'more Pythonic' way of doing this and learning this way rather 
than the practical purpose of flattening deeply nested lists.

Regards,
mk