UDP sender

udpsender.py

#!/usr/bin/env python

import socket
import sys

PREFIX = "PREFIX:"
HOST = '127.0.0.1'
PORT = 5555

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect((HOST, PORT))

with sys.stdin as f:
    while True:
        try:
            s.send(PREFIX + f.readline())
        except socket.error:
            pass