Removing Duplicates from Nested List Based on First 2 Elements

Question

I\'m trying to remove duplicates from a nested list only if the first 2 elements are the same, ignoring the third...

List:

L = [[\'el1\',\'el2\',\'va         


        

Answer 1

If the order doesn't matter, you can use that same method but using a tuple of the first and second elements as the key:

dict(((x[0], x[1]), x) for x in L).values()

Or on Python 2.7 and higher:

{(x[0], x[1]): x for x in L}.values()

Instead of (x[0], x[1]) you can use tuple(x[:2]), use whichever you find more readable.