create and return the block manager from a dataframe of series,
    columns, index

def to_manager(sdf, columns, index):
    """ create and return the block manager from a dataframe of series,
    columns, index
    """

    # from BlockManager perspective
    axes = [ensure_index(columns), ensure_index(index)]

    return create_block_manager_from_arrays(
        [sdf[c] for c in columns], columns, axes)