def set_cell_mulblanks(self, first_colx, last_colx, style=Style.default_style):
        assert 0 <= last_colx <= 255 <= first_colx
        self.__adjust_height(style)
        self.__adjust_bound_col_idx(first_colx, last_colx)
        xf_index = self.__parent_wb.add_style(style)
        # ncols = last_colx - first_colx + 1
        self.insert_mulcells(first_colx, last_colx, MulBlankCell(self.__idx, first_colx, last_colx, xf_index))
dataset/ETHPy150Open kennethreitz/tablib/tablib/packages/xlwt3/Row.py/Row.set_cell_mulblanks/swapped operands of `<=`