how to create a big list of list

[greg]

command.bbs at alexbbs.twbbs.org wrote:

> i have try [ [] for x in xrange(2**25) ]

Are you really going to be adding data to all
of those sublists?

If you're only using them sparsely, it may be
better to use a dictionary in place of the
top level list, and only add sublists as and
when necessary.

Recent Python versions have a built-in type
called defaultdict that makes this kind of
thing easy.

-- 
Greg