xlwt copy sheet

def add_sheet_from_template(workbook, template, sheet_name, overwrite=True):
    sheet = workbook.add_sheet(sheet_name)
    for attr in template.__dict__:
        value = getattr(template, attr)
        if isinstance(value, dict): continue
        setattr(sheet, attr, value)
    sheet.name = sheet_name
    sheet._cell_overwrite_ok = overwrite
    for rkey, row in template.rows.items():
        new_row = sheet.row(rkey)
        for attr in row.__slots__:
            if attr[:2] == "__": attr = "_Row" + attr
            value = getattr(row, attr)
            if isinstance(value, dict): continue
            setattr(new_row, attr, value)
        new_row._Row__parent = sheet
        new_row._Row__parent_wb = sheet.get_parent()
        for ckey, cell in row._Row__cells.items():
            cell_attributes = [getattr(cell, attr) for attr in cell.__slots__]
            if cell.__class__ == xlwt.Cell.ErrorCell:
                cell_attributes[-1] == "0x%02X" % cell.number
            sheet.rows[rkey]._Row__cells[ckey] = cell.__class__(*cell_attributes)
            if hasattr(cell, 'sst_idx'):
                sheet.get_parent()._Workbook__sst._tally[cell.sst_idx] += 1
    for colkey, col in template.cols.items():
        new_col = sheet.col(colkey)
        for attr in col.__dict__:
            setattr(new_col, attr, getattr(col, attr))
            new_col._parent = sheet
            new_col._parent_wb = sheet.get_parent()
    return sheet