Python Network programming

1. Python's network programming

(1), server-side code:

#!/usr/bin/python#_*_coding:utf-8_*_import socket #导入socket模块, Socket module has socket class SK = Socket.socket () Ip_port = (' 127.0.0.1 ', 9919) sk.bind (Ip_port) Sk.listen (5) while true:conn, address = Sk.accept () conn.send (' hello ') flag = T        Rue while Flag:data = Conn.recv (1024x768) print data if data = = ' exit ': Flag = False Conn.send (' SB ') Conn.close ()

(2), client code:

#!/usr/bin/python#_*_coding:utf-8_*_import socketclient = Socket.socket () Ip_port = (' 127.0.0.1 ', 9919) client.connect  (ip_port) While true:data = Client.recv (1024x768) print Data INP = Raw_input (' client: ') client.send (INP) if INP = = ' exit ': Break

(3), Operation results

Server-side:

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Client:

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This is a simple communication mode, but the basic can be achieved;

2. Python TCP Communication

(1), server-side code:

#!/usr/bin/python#_*_coding:utf-8_*_from socket import *from time import  ctimehost =  ' 192.168.1.112 ' port = 8810buffer = 1024addr =  (host,  Port) Ser = socket (Af_inet, sock_stream)   ser.bind (addr) Ser.listen (5)     while True:    print  ' waiting for connection ... '      cli,addr = ser.accept ()     print  ' ... connected from  :  ', addr     while true:         DATA = CLI.RECV (buffer)         print  ' Client > ', data        if data ==  ' exit ':             break         cli.send ('%s %s ' &NBsp;%  (CTime (),  data))     cli.close () Ser.close () 

(2), client code:

#!/usr/bin/python#_*_coding:utf-8_*_from Socket Import *host = ' 192.168.1.112 ' port = 8810buffer = 1024addr = (host, port) c Li = Socket (af_inet, sock_stream) cli.connect (addr) While true:data = Raw_input (' > ') if data = = ' exit ': BR Eak cli.send (data) data = CLI.RECV (buffer) print datacli.close ()

(3), Operation results

Server-side:

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Client:

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3. Python UDP communication

(1), Server side:

#!/usr/bin/python#_*_coding:utf-8_*_from Socket Import *from time import ctimehost = ' 192.168.1.112 ' port = 8812buffer = 10 24ADDR = (host, port) Ser = socket (af_inet, Sock_dgram) ser.bind (addr) print ' Waiting for message: ' While True:data, Addr = ser.recvfrom (buffer) print ' client: ', Data ser.sendto ('%s%s '% (CTime (), data), addr) Ser.close ()

(2), client

#!/usr/bin/python#_*_coding:utf-8_*_from Socket Import *host = ' 192.168.1.112 ' port = 8812buffer = 1024addr = (host, port) c Li = Socket (af_inet, sock_dgram) while true:data = Raw_input (' > ') if data = = ' exit ': Break Cli.sendto ( data, addr) data, addr = cli.recvfrom (buffer) print datacli.close ()

(3), Operation results

Server-side:

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Client:

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Python Network programming