def insert_cell(self, col_index, cell_obj):
        if col_index in self.__cells:
            if not self.__parent._cell_overwrite_ok:
                msg = "Attempt to overwrite cell: sheetname=%r rowx=%d colx=%d" \
                    % (self.__parent.name, self.__idx, col_index)
                raise Exception(msg)
            prev_cell_obj = self.__cells[col_index]
            sst_idx = getattr(prev_cell_obj, 'sst_idx', None)
            if sst_idx is not None:
                self.__parent_wb.del_str(sst_idx)
        self.__cells[col_index] = cell_obj
dataset/ETHPy150Open kennethreitz/tablib/tablib/packages/xlwt3/Row.py/Row.insert_cell/original