Failing to import itertools in Python 3.5.2 -

i new python. trying import izip_longest itertools. not able find import "itertools" in preferences in python interpreter. using python 3.5.2. gives me below error-

from itertools import izip_longest importerror: cannot import name 'izip_longest' 

please let me know right course of action. have tried python 2.7 , ended same problem. need use lower version python.

izip_longest renamed zip_longest in python 3 (note, no i @ start), import instead:

from itertools import zip_longest 

and use name in code.

if need write code works both on python 2 , 3, catch importerror try other name, rename:

try:     # python 3     itertools import zip_longest except importerror:     # python 2     itertools import izip_longest zip_longest  # use name zip_longest