def chunker(iterable, inc):
    """
    Convert an iterable into a list of inc sized lists.

    :param iterable: Iterable to chunk.
    :type iterable: list/tuple/string

    :param inc: Increment; how big each chunk is.
    :type inc: int
    """
    chunks = [iterable[x:x+inc] for x in range(0, len(iterable), inc)]
    return chunks