python 2-D list how to make a set [duplicate]

Answer 1

The most typical solutions have already been posted, so let's give a new one:

Python 2.x

list1 = [[1, 2], [3, 4], [1, 2]]
list2 = {str(v): v for v in list1}.values()

Python 3.x

list1 = [[1, 2], [3, 4], [1, 2]]
list2 = list({str(v): v for v in list1}.values())