Python3 (Socket implementation UDP,TCP socket programming)

#coding =utf-8# client program TCP connection import Sockets=socket.socket (Socket.af_inet,socket. Sock_stream) S.connect ((' 127.0.0.1 ', 9999)) print (S.RECV (1024x768)) for data in [' Michael ', ' Tracy ', ' Sarah ']:    s.send ( Data.encode ())    print (S.RECV (1024x768)) S.send (b ' exit ')

#coding =utf-8#tcp Server-side program import Socketimport timeimport threadingdef tcplink (sock,addr):    print ("Accept new Connection from%s:%s ... "% addr)    sock.send (" welcom! ". Encode ()) while    True:        data=sock.recv (1024x768)        time.sleep (1)        if data== ' exit ' or not data:            break        sock.send ("Hello:". Encode () +data)    sock.close ()    print ("Connection from%s:%s closed."% addr)        s= Socket.socket (Socket.af_inet,socket. SOCK_STREAM)  # Create a Sockets.bind ((' 127.0.0.1 ', 9999)) of the TCP protocol based on IPv4  #监听端口s. Listen (5) print ("Waiting for Connection ... ") while True:    sock,addr=s.accept ()    t=threading. Thread (target=tcplink,args= (sock, addr))    T.start ()    

Operation Result:

Waiting for connection......accept new connection from 127.0.0.1:60218...connection to 127.0.0.1:60218 closed.

B ' welcom! ' B ' Hello:michael ' B ' hello:tracy ' B ' Hello:sarah '

UDP client and server-side code:

#coding =UTF-8#UDP Client Code import sockets=socket.socket (Socket.af_inet,socket. SOCK_DGRAM) for data in ["Chenshan", "Yuanhui", "Chendianqiang"]:    s.sendto (Data.encode (), (' 127.0.0.1 ', 9999))    Print (S.RECV (1024x768))    S.close ()

#coding =UTF-8#UDP Protocol Server Code import sockets=socket.socket (Socket.af_inet,socket. SOCK_DGRAM) S.bind ((' 127.0.0.1 ', 9999)) print ("Bind UDP on prot:9999") while True:    data,addr=s.recvfrom (1024x768)    Print ("Receive from%s:%s"% addr)    s.sendto ("Hello". Encode () +data,addr)

Python3 (Socket implementation UDP,TCP socket programming)