optimizing large dictionaries

[Scott David Daniels]

Paul Rubin wrote:
> Per Freem <perfreem at yahoo.com> writes:
>> 2] is there an easy way to have nested defaultdicts? ie i want to say
>> that my_dict = defaultdict(defaultdict(int)) -- to reflect the fact
>> that my_dict is a dictionary, whose values are dictionary that map to
>> ints. but that syntax is not valid.
> 
> my_dict = defaultdict(lambda: defaultdict(int))
or
     my_dict = defaultdict(functools.partial(defaultdict, int))

--Scott David Daniels
Scott.Daniels at Acm.Org