def close(self):
		'''关闭与数据库的连接'''
		if VERBOSE:
			print 'Database connection CLOSE.'
		self.conn.close()
def on_fuzzing_range_start_changed(self, value: int):
        self.ui.sBAddRangeEnd.setMinimum(value)
        self.ui.sBAddRangeStep.setMaximum(self.ui.sBAddRangeEnd.value() - value)