#!/usr/bin/env python3
import socket

try:
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind(('', 1234))		# toutes les interfaces réseau sur le port 1234
    s.listen() 
    conn,addr = s.accept()
    while 1:
        data=conn.recv(1024)
        print(data.decode())
        reponse=input()
        conn.sendall(reponse.encode())
except KeyboardInterrupt:
    s.close()
finally:
    print("bye")