Proof of concept: UDP broadcasting over a local network

client.py

from socket import *

myip = gethostbyname(gethostname())
broadip = inet_ntoa( inet_aton(myip)[:3] + b'\xff' )

addr = (broadip, 34353)

UDPSock = socket(AF_INET, SOCK_DGRAM)

data = u'holii'
UDPSock.sendto(data.encode('utf-8'), addr)
print("Sending message '%s'..." % data)

UDPSock.close()
print('Client stopped.')

server.py

import socket

addr = ('', 34353)

UDPSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
UDPSock.bind(addr)

while True:
    data, addr = UDPSock.recvfrom(1024)
    if data == 'stop':
        print('Client wants me to stop.')
        break
    else:
        print("From addr: '%s', msg: '%s'" % (addr[0], data))

UDPSock.close()
print ('Server stopped.')