For loop to make it easier

[Yoriz]

A for loop using itertools and a itertools recipe

from itertools import tee


def pairwise(iterable):
    "s -> (s0,s1), (s1,s2), (s2, s3), ..."
    a, b = tee(iterable)
    next(b, None)
    return zip(a, b)


columns = 'a', 'b', 'c', 'd', 'e', 'f', 'j', 'h'

for pair in pairwise(columns):
    print(pair)

Output:
('a', 'b')
('b', 'c')
('c', 'd')
('d', 'e')
('e', 'f')
('f', 'j')
('j', 'h')