Get Previous and Next items in a forloop in Python

get_prev_next_items_iterable.py

'''
    source: http://stackoverflow.com/a/1012089/1777024
'''

from itertools import tee, islice, chain, izip  # official documentation https://docs.python.org/2/library/itertools.html

def prev_and_next(my_iterable):
    prevs, items, nexts = tee(my_iterable, 3)
    prevs = chain([None], prevs)
    nexts = chain(islice(nexts, 1, None), [None])
    return izip(prevs, items, nexts)
    
my_iterable = ['one', 'two', 'three', 'four', 'five']

for previous, item, nxt in prev_and_next(my_iterable):
    print "Previous item is: " , previous , "--" , "Current item is: " , item , "--" , "Next item is: ", nxt