input must be a list.

    SeeAlso:
        ichunks

    References:
        http://stackoverflow.com/questions/434287/iterate-over-a-list-in-chunks

def ichunks_list(list_, chunksize):
    """
    input must be a list.

    SeeAlso:
        ichunks

    References:
        http://stackoverflow.com/questions/434287/iterate-over-a-list-in-chunks
    """
    return (list_[ix:ix + chunksize] for ix in range(0, len(list_), chunksize))