address_info_client.py

import socket

LOCAL_IP = "0.0.0.0"
LOCAL_PORT = 34197

REMOTE_IP = "myserverintheweb.xyz"
REMOTE_PORT = 20000

if __name__ == "__main__":
    sock = socket.socket(   socket.AF_INET,
                            socket.SOCK_DGRAM)
    sock.bind((LOCAL_IP, LOCAL_PORT))

    sock.sendto(bytes(MESSAGE, 'UTF-8'), (REMOTE_IP, REMOTE_PORT))
    data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
    print(data)

address_info_server.py

import socket

UDP_IP = "0.0.0.0"
UDP_PORT = 20000

if __name__ == "__main__":
    sock = socket.socket(   socket.AF_INET,
                            socket.SOCK_DGRAM)
    sock.bind((UDP_IP, UDP_PORT))

    while True:
        data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
        response = '{0}:{1}'.format(addr[0], addr[1])
        sock.sendto(bytes(response, 'UTF-8'), addr)

send_packets.py

import time
import socket

LOCAL_ADDRESS = ("0.0.0.0", 34197)

CLIENT_ADDRESSES = [
    ("yyy.yyy.yyy.yyy", 34197),
    ("zzz.zzz.zzz.zzz", 34197)
  ]

if __name__ == "__main__":

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

    print("sending packets to clients")
    while True:
        for client in CLIENT_ADDRESSES:
          sock.sendto(bytes("foobar", 'UTF-8'), client)
          time.sleep(2)