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Unpacking nested lists - yonatan776 - Apr-14-2020
Hey, I beleive it's a relatively simple quiestion although i didn't find any simple answer in Google.
I'd like to create a function that unpacks a list of lists and create a new list that sums up the variables which are in the same index.
For instance: [[1,1],[1,3]] ---> [2,4]
or [[1,1,1],[1,0,0],[0,0,100]] ---> [2,1,101]
Not suppose to be very complex.
Thanks!
RE: Unpacking nested lists - buran - Apr-14-2020
>>> foo = [[1,1],[1,3]] >>> [sum(item) for item in zip(*foo)] [2, 4] >>> foo = [[1,1,1],[1,0,0],[0,0,100]] >>> [sum(item) for item in zip(*foo)] [2, 1, 101]an alternative to list comprehension is map
>>> foo = [[1,1,1],[1,0,0],[0,0,100]] >>> list(map(sum, zip(*foo))) [2, 1, 101]