说明：  使用python实现socket编程实现一个简单的服务器功能，使用到了多线程和线程池的功能，线程池维护了线程的产生和取消，减少开销，是一个相关简单的python server的开发代码，可以实现后续扩展
(Use python achieve socket programming to implement a simple server function, use the function multithreading and thread pool thread pool maintenance thread creation and cancellation, reduce overhead, is a relative simple python server development code can be achieved subsequent expansion)