按照代码编写，服务器端可以接收客户端数据，但是服务器端报错如下：

Traceback (most recent call last):

----------------------------------------

  File "D:\Coding\Python\lib\SocketServer.py", line 596, in process_request_thread

Exception happened during processing of request from ('127.0.0.1', 49579)

    self.finish_request(request, client_address)

----------------------------------------

  File "D:\Coding\Python\lib\SocketServer.py", line 331, in finish_request

    self.RequestHandlerClass(request, client_address, self)

  File "D:\Coding\Python\lib\SocketServer.py", line 652, in __init__

    self.handle()

  File "D:/Coding/code draft/socket_server_tcp_block.py", line 24, in handle

    data=conn.recv(1024)

  File "D:\Coding\Python\lib\socket.py", line 174, in _dummy

    raise error(EBADF, 'Bad file descriptor')

error: [Errno 9] Bad file descriptor

求解。