def _izip_longest(*args, **kwds):
    """Taken from Python docs

    http://docs.python.org/library/itertools.html#itertools.izip
    """
    fillvalue = kwds.get('fillvalue')
    def sentinel(counter = ([fillvalue]*(len(args)-1)).pop):
        yield counter() # yields the fillvalue, or raises IndexError
    fillers = itertools.repeat(fillvalue)
    iters = [itertools.chain(it, sentinel(), fillers) for it in args]
    try:
        for tup in itertools.izip(*iters):
            yield tup
    except __HOLE__:
        pass
dataset/ETHPy150Open cloudkick/libcloud/libcloud/compute/drivers/linode.py/_izip_longest