[python] simple tcp

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import socket
import threading
import time

def tcplink(sock, addr):
    print('Accept new connection from %s:%s...' % addr)
    sock.send(b'Welcome!')
    while True:
        data = sock.recv(1024)
        time.sleep(1)
        if not data or data.decode('utf-8') == 'exit':
            break
        sock.send(('Hello, %s!' % data.decode('utf-8')).encode('utf-8'))
    sock.close()
    print('Connection from %s:%s closed.' % addr)


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.bind(('127.0.0.1', 9999))

s.listen(5)

print('Waiting for connection...')

while True:
    sock, addr = s.accept()
    t = threading.Thread(target = tcplink, args = (sock, addr))
    t.start()

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect(('127.0.0.1', 9999))

print(s.recv(1024).decode('utf-8'))
for data in [b'Michael', b'Tracy', b'Sarah']:
    s.send(data)
    print(s.recv(1024).decode('utf-8'))
s.send(b'exit')
s.close()