def close(self):
		'''关闭与数据库的连接'''
		if VERBOSE:
			print 'Database connection CLOSE.'
		self.conn.close()
def unbound_on_Server(host, port,
                              use_ssl,
                              connect_timeout, *a, **kwargs):
            return self._on_Server(host, port,
                              use_ssl,
                              connect_timeout, *a, **kwargs)