import socket
import sys

ip='localhost'
port=10000
# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# Bind the socket to the port
server_address = (ip, port)
print 'starting up on' , server_address
sock.bind(server_address)

while True:
    print '\nwaiting to receive message'
    data, address = sock.recvfrom(4096)
    
    print 'received ',len(data), 'bytes from',  address
    print data
    
    if data:
        sent = sock.sendto(data, address)
        print 'sent', sent, ' bytes back to ',address