Get unique items from list of lists? [duplicate]

Answer 1

When you don't care about the sorting of internal lists, convert everything to sets first:

uniq_animal_groups  = map(list, set(map(tuple, map(set, animal_groups))))

Answer 2

uniq_animal_groups = set(map(tuple, animal_groups))

will do the trick, though you will end up with a set of tuples instead of a set of lists. (Of course you could convert this back to a list of lists, but unless there is a specific reason to do so, why bother?)

Answer 3

Convert the lists to tuples, and then you can put them into a set.

Essentially:

uniq_animal_groups = set(map(tuple, animal_groups))

If you prefer the result to be a list of lists, try:

uniq_animal_groups = [list(t) for t in set(map(tuple, animal_groups))]

or:

uniq_animal_groups = map(list, set(map(tuple, animal_groups)))