def __init__(self, nrows, row_height=None, col_width=None):
self.nrows = nrows<EOL>self.col_width = col_width<EOL>self.row_height = row_height<EOL>BaseTemplate.__init__(self)<EOL>
Multiple column layout with nrows and required number of
        columns. col_width
        determines the width of the column (defaults to width of the
        first added element)