终于拿到了，我是这样让它工作的：

1. 使用编辑my.cnf(此文件可以位于多个不同位置，甚至可能不存在，我将我的文件放在此处/usr/local/etc/：

   [mysqld]
   bind-address=0.0.0.0
   skip-host-cache
   skip-name-resolve
   

2. 将端口3306开放到互联网(对于Xfinity，这意味着进入http://10.0.0.1/单击左侧的"高级">底部的"端口转发">"添加设备"，找到运行MySQL的设备，然后单击"添加")

3. 在MySQL和FLUSH PRIVILEGES;中授予相应权限。您可以使用GRANT ALL PRIVILEGES ON *.* TO <USER>@'%' IDENTIFIED BY '<PASSWORD>'来完成此操作，但这允许任何IP，下面的Python脚本将授予Google的IP。您应该根据Google的JDBC文档检查此IP列表。

   from sqlalchemy import create_engine, MetaData
   
   conString = 'mysql+pymysql://<USER>:<PASSWORD>@localhost:3306/<DB>'
   mysql = create_engine(conString)
   
   ips = ['64.18.0.0 - 64.18.15.255',
   '64.233.160.0 - 64.233.191.255',
   '66.102.0.0 - 66.102.15.255',
   '66.249.80.0 - 66.249.95.255',
   '72.14.192.0 - 72.14.255.255',
   '74.125.0.0 - 74.125.255.255',
   '173.194.0.0 - 173.194.255.255',
   '207.126.144.0 - 207.126.159.255',
   '209.85.128.0 - 209.85.255.255',
   '216.239.32.0 - 216.239.63.255']
   
   for ip in ips:
       ip2 = ip.replace(' - ', '/')
       try:
           sql = "CREATE USER '<USER>'@'" + ip2 + "' identified by '<PASSWORD>';"
           mysql.execute(sql)
       except:
           print ip2
       sql = "GRANT ALL PRIVILEGES ON <DB>.* TO '<USER>'@'" + ip2 + "';"
       mysql.execute(sql)