# Echo server program  
from socket import *  
from time import ctime  
  
HOST = ‘‘                 # Symbolic name meaning all available interfaces  
PORT = 50007              # Arbitrary non-privileged port  
BUFSIZE = 1024  
ADDR = (HOST, PORT)  
  
tcpSerSock = socket(AF_INET, SOCK_STREAM)  
tcpSerSock.bind(ADDR)  
tcpSerSock.listen(5)  
  
while True:  
    print(‘waiting for connection...‘)  
    tcpCliSock, addr = tcpSerSock.accept()  
    print(‘...connected from:‘, addr)  
  
    while True:  
        data = tcpCliSock.recv(BUFSIZE).decode()  
        if not data:  
            break  
        tcpCliSock.send((‘[%s] %s‘ % (ctime(), data)).encode())  
    tcpCliSock.close()  
tcpSerSock.close()  

# Echo client program  
from socket import*  
  
HOST = ‘127.0.0.1‘  
PORT = 50007              # The same port as used by the server  
BUFSIZE = 1024  
ADDR = (HOST, PORT)  
  
tcpCliSock = socket(AF_INET, SOCK_STREAM)  
tcpCliSock.connect(ADDR)  
while True:  
    data = input(‘> ‘)  
    if not data:  
        break  
    tcpCliSock.send(data.encode())  
    data = tcpCliSock.recv(BUFSIZE).decode()  
    if not data:  
        break  
    print(data)  
      
tcpCliSock.close()