udp_send.py

import socket
from contextlib import closing

def main():
  host = '192.168.15.10'
  port = 12345
  sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  with closing(sock):
    message = 'Hello world'.encode('utf-8')
    print(message)
    sock.sendto(message, (host, port))
  return

if __name__ == '__main__':
  main()