I have a system that has a few lists that are very large (thousands or tens of thousands of entries) and some that are rather small. Many times I have to produce the difference between a large list and a small one, without destroying the integrity of either list. I was wondering if anyone has any recommendations on how to do this and keep performance high? Is there a better way than
[ i for i in bigList if i not in smallList ] Thanks. Chaz -- http://mail.python.org/mailman/listinfo/python-list