OSError: [Errno 98] Address already in use 错误是指端口被占用，未释放或者程序没有正常结束
解决办法：
1.更换端口
2.使用终端命令杀死进程(可以在PyCharm的Terminal中输入命令)
lsof -i:5050
lsof -i:端口号 ：可通过端口号来查找进程ID
kill -9 pid
pid是指进程的ID号 ，kill -9 用来强制杀死进程![解决：OSError: [Errno 98] Address already in use](https://image.shishitao.com:8440/aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzQ0Ny8wZWZhYzJlYTQ5Y2UwZTU2ZjEzNTVlN2I4ZmRkZDhmZi5wbmc%3D.png?w=700&webp=1 "解决：OSError: [Errno 98] Address already in use")
PyCharm中杀死进程![解决：OSError: [Errno 98] Address already in use](https://image.shishitao.com:8440/aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzc0L2QyY2YwMGE4YTdiMWQxMTIwYzYxYWM2Y2M3MmQ5OWEyLnBuZw%3D%3D.png?w=700&webp=1 "解决：OSError: [Errno 98] Address already in use")
![解决：OSError: [Errno 98] Address already in use](https://image.shishitao.com:8440/aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzc5My9kNjAwMjRiOTBmY2RjZTJlMzMxOTA0OTA1YTg3ODJkOS5wbmc%3D.png?w=700&webp=1 "解决：OSError: [Errno 98] Address already in use")
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