python search broadcast

yee.py

import socket
import fcntl

# Socket for scanning
scan_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Lock the socket
fcntl.fcntl(scan_socket, fcntl.F_SETFL, os.O_NONBLOCK)

# Multicast address
address = ("239.255.255.250", 1982)

def send_search_broadcast():
    # Searching message
    msg = "M-SEARCH * HTTP/1.1\r\n" 
    msg = msg + "HOST: 239.255.255.250:1982\r\n"
    msg = msg + "MAN: \"ssdp:discover\"\r\n"
    msg = msg + "ST: wifi_bulb"
    msg = msg.encode()
    scan_socket.sendto(msg, address)