MySQLdb.OperationalError: (2002, "Can't connect to server on '127.0.0.1' (10061)")

这个MySQL错误信息 `(2002, "Can't connect to server on '127.0.0.1' (10061)")` 表示在尝试连接到本地MySQL服务器时遇到了问题。具体来说：

- 错误码2002通常表示"Can't connect to MySQL server"，即无法连接到指定的MySQL服务器。
- 其中，"(10061)"是一个更具体的错误代码，它通常对应于"Connection refused"，意味着MySQL服务没有监听请求，可能是由于以下几个原因：
- MySQL服务未运行：确认MySQL是否正在运行，你可以通过命令行启动服务。
- 端口错误：默认情况下，MySQL监听3306端口，检查你的应用程序是否连接到了正确的端口。
- 防火墙阻止：检查防火墙设置，确保从你的机器上访问MySQL服务的网络流量没有被阻断。
- 网络配置问题：如果你的服务器部署在网络环境中，可能存在网络配置或路由问题。

要解决这个问题，你需要定位并修复上述问题之一。如果是软件故障，重启MySQL服务可能会有所帮助。如果是网络问题，则需要调整网络安全设置或排查网络配置。

相关问题

MySQLdb.OperationalError: (2002, "Can't connect to server on 'localhost' (10061)")

This error message indicates that the MySQL client is unable to connect to the MySQL server running on the localhost (i.e., the same machine as the client). The error code 10061 specifically indicates that the connection was refused by the server.

There are several possible causes for this error, including:

1. The MySQL server is not running. In this case, you will need to start the MySQL server before attempting to connect to it.

2. The MySQL server is running on a different host or port. By default, MySQL runs on port 3306, but it is possible to change the port number. Check your MySQL configuration to ensure that you are using the correct host and port settings.

3. The MySQL server is not configured to allow remote connections. By default, MySQL is configured to only accept connections from the localhost. If you are attempting to connect to the server from a remote machine, you may need to configure MySQL to allow remote connections.

4. There is a firewall or network issue preventing the client from connecting to the server. Check your firewall settings and network configuration to ensure that the client is able to communicate with the server.

To troubleshoot this issue, you can try the following steps:

1. Verify that the MySQL server is running and accepting connections.

2. Check your MySQL configuration to ensure that you are using the correct host and port settings.

3. Verify that the MySQL server is configured to allow remote connections if you are connecting from a remote machine.

4. Check your firewall settings and network configuration to ensure that the client is able to communicate with the server.

If you are still unable to connect to the MySQL server, you may need to consult the MySQL documentation or seek assistance from a qualified MySQL administrator.

MySQLdb.OperationalError: (1049, "Unknown database 'testdb'")

This error message indicates that the database 'testdb' does not exist in the MySQL server.

To resolve this error, you can create the 'testdb' database in MySQL by running the following SQL command in MySQL shell or through a MySQL client:

CREATE DATABASE testdb;

Alternatively, you can use an existing database by modifying your code to use the correct database name.