checking for last item in for loop

[Skaperen]

Last item will always be there after iteration:

>>> for i in range(2):
...     pass
...
>>> i
1

i am doing an lzma.open() or bzip2.open() or gzip.open() call each time. the mode needs to be binary each time except the last. are you assuming that i need to do an additional action after the last? i need to change the 2nd argument on the last one (even if it is the only one).