Python: Uniqueness for list of lists

Question

I am curious what would be an efficient way of uniquefying such data objects:

testdata =[ [\'9034968\', \'ETH\'], [\'14160113\', \'ETH\'], [\'9034968\', \'ETH         


        

Answer 1

I tried @Mark's answer and got an error. Converting the list and each elements into a tuple made it work. Not sure if this the best way though.

list(map(list, set(map(lambda i: tuple(i), testdata))))

Of course the same thing can be expressed using a list comprehension instead.

[list(i) for i in set(tuple(i) for i in testdata)]

I am using Python 2.6.2.

Update

@Mark has since changed his answer. His current answer uses tuples and will work. So will mine :)

Update 2

Thanks to @Mark. I have changed my answer to return a list of lists rather than a list of tuples.