pairwise traversal of a list or tuple

Question

a = [5, 66, 7, 8, 9, ...]

Is it possible to make an iteration instead of writing like this?

a[1] - a[0]

a[2] - a[1]

a[3] - a[2]

         


        

Answer 1

def pairwise(iterable):
    i = iter(iterable)
    while True:
        yield next(i), next(i, '')