Client

import socket
import threading
host = "localhost"
port = 14909
class client(threading.Thread):
    def __init__(self, sock):
        self.sock=sock
        threading.Thread.__init__(self)
    def run(self):
        try:
            while 1:
                data = self.sock.recv(1024)
                print (data.decode("utf-8"))
        finally:
            #sen.alive=False
            self.sock.close()
            return
class send(threading.Thread):
    def __init__(self, sock):
        self.sock=sock
        self.alive=True
        threading.Thread.__init__(self)
    def run(self):
        while 1:
            if self.alive:
                key=input('>>')
                try:
                    self.sock.send(bytes(key.encode('utf-8')))
                except:
                    return
            else:
                return

s = socket.socket()
s.connect((host, port))
try:
    th=client(s)
    th.start()
    sen=send(s)
    sen.start()
finally:
    s.close()