Chaz Ginger <[EMAIL PROTECTED]> writes: > 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 ]
diff = list(set(bigList) - set(smallList)) Note that doesn't get you the elements in any particular order. -- http://mail.python.org/mailman/listinfo/python-list
