server
srv_sock = socket.socket()
srv_sock.bind(ip_port_tuple)
srv_sock.listen(5)
conn, addr = srv_sock.accept()
srv_sock.getsockname() 获取自己sock的名字
client
cli_sock = socket.socket()
cli_sock.connect(ip_port_tuple)
cli_sock.send(bytes)
cli_sock.recv(bytes)
