Python 3.1 beta 1

[Benjamin Peterson]

 <bearophileHUGS <at> lycos.com> writes:
> 
> collections.Counter and collections.OrderedDict: very nice and useful.
> Is the order inside OrderedDict kept with a double linked list of the
> items?
 
There's a doubly-linked list containing the values. Another dictionary maps keys
to the list.