老师，我这么处理了数据库名字，但是还是报错。

import mysql.connector.pooling
class cs:
    def css(self):
        config={
            "host": "cluster-cgtif4qwlwcf.ap-southeast-1.rds.amazonaws.com",
            'port':'3306',
            'user':'admin',
            'password':'*******',
            'database':'mark1'
        }
        #con = mysql.connector.connect(**config)
        #cursor = con.cursor()

        pool=mysql.connector.pooling.MySQLConnectionPool(**config,pool_size=10,pool_name='hc-dev')
        con=pool.get_connection()
        cursor=con.cursor()
        sql = "SELECT captcha_code FROM captcha_send_record WHERE send_email='11111@qq.com' ORDER BY create_time LIMIT 1;"

        cursor.execute(sql)
        invite_code=cursor.fetchone()[0]
        print(invite_code)
        return invite_code
        con.close()


if __name__=='__main__':
    cs=cs()
    cs.css()

D:\PyCharm\untitled\venv\Scripts\python.exe D:/PyCharm/untitled/imooc/mark/sqldb/markmysql.py

Traceback (most recent call last):

  File "D:\python3\lib\site-packages\mysql\connector\network.py", line 547, in open_connection

    addrinfos = socket.getaddrinfo(self.server_host,

  File "D:\python3\lib\socket.py", line 918, in getaddrinfo

    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):

socket.gaierror: [Errno 11001] getaddrinfo failed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "D:/PyCharm/untitled/imooc/mark/sqldb/markmysql.py", line 44, in <module>

    cs.css()

  File "D:/PyCharm/untitled/imooc/mark/sqldb/markmysql.py", line 30, in css

    pool=mysql.connector.pooling.MySQLConnectionPool(**config,pool_size=10,pool_name='hc-dev')

  File "D:\python3\lib\site-packages\mysql\connector\pooling.py", line 179, in __init__

    self.add_connection()

  File "D:\python3\lib\site-packages\mysql\connector\pooling.py", line 290, in add_connection

    cnx = Connect(**self._cnx_config)

  File "D:\python3\lib\site-packages\mysql\connector\__init__.py", line 273, in connect

    return MySQLConnection(*args, **kwargs)

  File "D:\python3\lib\site-packages\mysql\connector\connection.py", line 107, in __init__

    self.connect(**kwargs)

  File "D:\python3\lib\site-packages\mysql\connector\abstracts.py", line 1003, in connect

    self._open_connection()

  File "D:\python3\lib\site-packages\mysql\connector\connection.py", line 350, in _open_connection

    self._socket.open_connection()

  File "D:\python3\lib\site-packages\mysql\connector\network.py", line 565, in open_connection

    raise errors.InterfaceError(

mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on '%-.100s:%u' (%s) (Warning: %u format: a number is required, not str)

Process finished with exit code 1