[4, 5, 6]]

    If the length of *iterable* is not evenly divisible by *n*, the last
    returned list will be shorter:

        >>> list(chunked([1, 2, 3, 4, 5, 6, 7, 8], 3))
        [[1, 2, 3], [4, 5, 6], [7, 8]]

    To use a fill-in value instead, see the :func:`grouper` recipe.

    :func:`chunked` is useful for splitting up a computation on a large number
    of keys into batches, to be pickled and sent off to worker processes. One
    example is operations on rows in MySQL, which does not implement
    server-side cursors properly and would otherwise load the entire dataset
    into RAM on the client.

    )