get the last element of a generator (python)

gistfile1.txt

#modification of http://stackoverflow.com/questions/5983265/pythonic-way-of-determining-if-the-current-element-is-the-first-or-last-element


def annotate_last_item(gen):
    prev_val = gen.next()
    for val in gen:
        yield False, prev_val
        prev_val = val
    yield True, prev_val


for last_item, obj in annotate_last_item(generator):
    if last_item:
        #yup 
    else:
        #whatever