def close(self):
		'''关闭与数据库的连接'''
		if VERBOSE:
			print 'Database connection CLOSE.'
		self.conn.close()
def on_btn_del_row_clicked(self):
        min_row, max_row, _, _ = self.ui.tblFuzzingValues.selection_range()
        self.delete_lines(min_row, max_row)