>>> ll = [[1,2],[2,1],[3,1],[1,4],[3,3],[1,4]] >>> ls = [frozenset(i) for i in ll] >>> ss = set(ls) >>> ss set([frozenset([1, 3]), frozenset([1, 2]), frozenset([1, 4]), frozenset([3])]) >>> [list(i) for i in ss] [[1, 3], [1, 2], [1, 4], [3]]
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