Multicast in python is freezing my network. How to send data through socket without freezing a network?

Question

import socket
import json
from helper import sendDet

MCAST_GRP = \'224.0.0.1\'
MCAST_PORT = 5111
MULTICAST_TTL = 2

res = sendDet()
res = {\'data\': res}
res = json.dum