simple_udp_server.py

import socket
import sys

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

server_address = ('localhost', 8080)
print >>sys.stderr, 'starting up on %s port %s' % server_address
sock.bind(server_address)

while True:
    print >>sys.stderr, '\nwaiting to receive message'
    data, address = sock.recvfrom(4096)
    
    print >>sys.stderr, 'received %s bytes from %s' % (len(data), address)
    print >>sys.stderr, data