system error: 10048 - Only one usage of each socket address (protocol/network address/port) is norma

Python报错：

RuntimeError: The server socket has failed to listen on any local network address. The server socket has failed to bind to [DESKTOP-7FQDOK8]:6699 (system error: 10048 - Only one usage of each socket address (protocol/network address/port) is normally permitted.).

解决方法：端口被正在运行的相同程序或不同程序占用了（这里是6699）。更改为其他数值的端口就好。