On Fri, Sep 16, 2011 at 8:02 AM, Vlastimil Brom <vlastimil.b...@gmail.com> wrote: > Besides the above sugestions to correct the nested list approach, > if you need to set and access the data at the given "coordinates" you > could also use a nested defaultdict...
The defaultdict is efficient for a sparse matrix, but I suspect that it'd be rather worse if you use all the elements. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
