Python eliminate duplicates of list with unhashable elements in one line [duplicate]

Answer 1

Python 2

>>> from itertools import groupby
>>> a = [[1,2],[1,2],[1,3]]
>>> [k for k,v in groupby(sorted(a))]
[[1, 2], [1, 3]]

Works also in Python 3 but with caveat that all elements must be orderable types.