###python3.8
#!/usr/bin/env python
from socketserver import (TCPServer as TCP, StreamRequestHandler as SRH)
from time import ctime

HOST = ‘‘
PORT = 21567
ADDR = (HOST, PORT)

class MyRequesHandler(SRH):
    def handle(self):
        self.data = str(self.request.recv(1024).strip(),‘utf8‘)
        print(‘...connected from:‘,self.client_address)
        print(self.data)
        self.request.sendall(bytes(‘%s %s‘ % (self.data,ctime()),‘utf8‘))

tcpServ = TCP(ADDR, MyRequesHandler)
print(‘waiting for connection...‘)
tcpServ.serve_forever()

###python3.8
# !/usr/bin/env python
from socket import *

HOST = ‘localhost‘
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)

while True:
    tcpClisock = socket(AF_INET, SOCK_STREAM)
    tcpClisock.connect(ADDR)
    data = input(‘> ‘)
    if not data:
        break
    tcpClisock.send(bytes(data,‘utf8‘))
    data = tcpClisock.recv(BUFSIZ)
    if not data:
        break
    print(str(data.strip(),‘utf8‘))
    tcpClisock.close()

###python2.7
#!/usr/bin/env python
from SocketServer import (TCPServer as TCP, StreamRequestHandler as SRH)
from time import ctime

HOST = ‘‘
PORT = 21567
ADDR = (HOST, PORT)

class MyRequesHandler(SRH):
    def handle(self):
        print ‘...connected from:‘,self.client_address
        self.wfile.write(‘[%s] %s‘ % (ctime(), self.rfile.readline()))

tcpServ = TCP(ADDR, MyRequesHandler)
print ‘waiting for connection...‘
tcpServ.serve_forever()

###python2.7
# !/usr/bin/env python
from socket import *

HOST = ‘localhost‘
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST, PORT)

while True:
    tcpClisock = socket(AF_INET, SOCK_STREAM)
    tcpClisock.connect(ADDR)
    data = raw_input(‘> ‘)
    if not data:
        break
    tcpClisock.send(‘%s\r\n‘ % data)
    data = tcpClisock.recv(BUFSIZ)
    if not data:
        break
    print data.strip()
    tcpClisock.close()