Numpy Adding two vectors with different sizes

Question

If I have two numpy arrays of different sizes, how can I superimpose them.

a = numpy([0, 10, 20, 30])
b = numpy([20, 30, 40, 50, 60, 70])

What

Answer 1

Very similar to the one above, but a little more compact:

l = sorted((a, b), key=len)
c = l[1].copy()
c[:len(l[0])] += l[0]