Python - select的用法

import select
import socket
import queue

server = socket.socket()
server.bind(("localhost",9999))
server.listen(1000)

server.setblocking(False)

inputs=[server]
outputs=[]
msg_dict={}
while True:
    readable,writeable,exceptional=select.select(inputs,outputs,inputs)
    #print(readable,writeable,exceptional)
    #print(inputs)
    for  r in readable :
        #print(r)
        if r is server :
            conn,addr=server.accept()
            inputs.append(conn)
            print(inputs)
            msg_dict[conn]=queue.Queue()

        else:
            data=r.recv(1024)
            print("已收到：",data)
            msg_dict[r].put(data)
            outputs.append(r)


    for w in writeable :
        client_data=msg_dict[w].get()
        w.send(client_data)
        outputs.remove(w)
    for e in exceptional :
        if e in outputs:
            outputs.remove(e)
        inputs.remove(e)
        del msg_dict[e]