python - Removing repeated sub-lists from a list -


i have list follows:

l = [['a', 'c', 'd'], ['b', 'e'], ['a', 'c', 'd'], ['a', 'c', 'd'], ['b', 'e'], ['f']]

the result should be:

[['a', 'c', 'd'], ['b', 'e'], ['f']]

the order of elements not important.

i tried as:

print list(set(l))

does numpy has better way

lists not "hashable" type , cannot members of set.

frozen sets can, first convert (also making sublists order-insentive), , later convert lists.

print map(list, set(map(frozenset, l)))

or if prefer comprehensions, 

print [list(x) x in {frozenset(x) x in l}]

i doubt numpy offers "better" (for definition of better) way.

this way imo clearest , pythonic.

the reason lists cannot part of sets mutable, hash different hash after changed; being in hash-based set make confusing behavior.


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