Iterate a list as pair (current, next) in Python

Question

I sometimes need to iterate a list in Python looking at the \"current\" element and the \"next\" element. I have, till now, done so with code like:

for curre         


        

Answer 1

Roll your own!

def pairwise(iterable):
    it = iter(iterable)
    a = next(it, None)

    for b in it:
        yield (a, b)
        a = b