Solution 1:
Using just sum and zip as you mention, however zip still returns a generator, which is memory efficient, not sure why you think otherwise.
list(map(sum, (zip(*a))))
Sum of elements of a 2d list in Python
Solution 1:
Using just sum and zip as you mention, however zip still returns a generator, which is memory efficient, not sure why you think otherwise.
list(map(sum, (zip(*a))))