Simple UDP broadcasting demo

broadcast.py

import socket
import argparse

parser = argparse.ArgumentParser()
parser.add_argument('-m', '--mode', choices=['sender', 'receiver'], required=True)
arguments = parser.parse_args()

is_sender = arguments.mode == 'sender'
receiver_port = 1234
receive_size = 1024

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
sock.settimeout(0.2)

if is_sender:
    payload_bytes = b'Hello world!'
    print('sending "{}"'.format(payload_bytes))
    sock.sendto(payload_bytes, ('<broadcast>', receiver_port))
else:
    sock.bind(('', receiver_port))
    print('receiving...')
    while True:
        try:
            pass
            data, addr = sock.recvfrom(receive_size)
            print('got "{}" from {}'.format(data, addr))
            break
        except socket.timeout:
            pass # Handle timeout, stop with Ctrl + C
print('end.')