python - Unique items in list of sets -

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if have list of sets:

>>> lst = [{1, 2}, {0, 1}, {1, 2}]

how return unique items?

trying known set() not work:

>>> set(lst) typeerror: unhashable type: 'set'

if "unique items" mean unique sets, use frozenset, hashable immutable version of set. either build sets frozenset objects initially, or if need mutate them, like:

uniques = set(frozenset(s) s in lst)

then:

>>> uniques set([frozenset([1, 2]), frozenset([0, 1])])

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