我想用raspberrypi中的python连接mysql-rds-db（我想用selectquery从mysql表'face'中获取seq）
我有一个错误，但我不能修复它。
这是rds mysql连接代码：

import rds_config
import pymysql

rds_host = rds_config.rds_host
name = rds_config.rds_user
password = rds_config.rds_pwd
db_name = rds_config.rds_db

conn = pymysql.connect(rds_host, user=name, passwd=password, db=db_name, 
connect_timeout=10)
with conn.cursor() as cur:
    cur.execute("select seq from face")
    conn.commit()

rds\配置：

rds_host='rds endpoint'
rds_port=3306
rds_user='user'
rds_pwd='password'
rds_db='db name'

这是回溯：

Traceback (most recent call last):
  File "getRds.py", line 18, in <module>
    conn = pymysql.connect(rds_host, user=name, passwd=password, db=db_name, connect_timeout=10)
  File "/usr/local/lib/python2.7/dist-packages/pymysql/__init__.py", line 94, in Connect
    return Connection(*args,**kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 327, in __init__
    self.connect()
  File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 598, in connect
    self._request_authentication()
  File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 862, in _request_authentication
    auth_packet = self._process_auth(plugin_name, auth_packet)
  File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 933, in _process_auth
    pkt = self._read_packet()
  File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 683, in _read_packet
    packet.check_error()
  File "/usr/local/lib/python2.7/dist-packages/pymysql/protocol.py", line 220, in check_error
    err.raise_mysql_exception(self._data)
  File "/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 109, in raise_mysql_exception
    raise errorclass(errno, errval)
pymysql.err.InternalError: (1049, u"Unknown database 'bsb-rds'")

我已经在vpc安全组中添加了ip地址，并且打开了公共访问。可以通过mysql cli或workbench进行连接。
有人能帮我吗？