Python---io multiplexing

The IO here refers to the network IO

IO multiplexing via select module in Python, select, poll, Epoll, etc. in select module

The following example implements IO multiplexing with the Select module

Only IO multiplexing can only implement pseudo concurrency

Server-side

#!/usr/bin/env python#-*-coding:utf-8-*-__author__='Zhoufeng'ImportSocketImportSelectsk=socket.socket () Sk.bind ('127.0.0.1', 9999,)) Sk.listen (5) Inputs=[sk,]#objects to listen to whileTrue:#The rlist element is the socket object    #listen to the SK (server side) object, if the SK object changes, indicating that there is a client to connect, at this time the rlist value is [SK]    #listen to the Conn object, if the conn changes, indicating that the client has a new message sent over, at this time the value of rlist is [client]Rlist,w,e=select.select (inputs,[],[],1)    #print (rlist)    Print(len (inputs), Len (rlist)) forRinchRlist#If the Rlist list is empty, this for loop does not execute        ifR==sk:#indicates that there is a new client to connect            #print (R)Conn,addr=r.accept ()#Create a Conn object for a new clientInputs.append (conn)#Place the new Conn object in the inputsConn.sendall (Bytes ('Hello', encoding='Utf-8'))        Else: R.recv (1024)#indicates that the client sent the data

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Client

#!/usr/bin/env python#-*-coding:utf-8-*-__author__='Zhoufeng'ImportSocketImportSelectsk=socket.socket () Sk.connect ('127.0.0.1', 9999,)) Data=SK.RECV (1024)Print(data) whileTRUE:INP=input ('>>>') Sk.sendall (bytes (inp,encoding='Utf-8') ) Sk.close ()

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Python---io multiplexing