python multicast fails with windows 10

import socket
import binascii
import struct

def create_ipv4_sockets():
    mcast_address   = "226.1.1.1"
    src_address     = "0.0.0.0"
    port            = 50000
    group           = (mcast_address, port)
    # Open a multicast receive socket and join the group
    rxsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
    rxsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

    rxsock.bind((src_address,50000) )

    print(socket.INADDR_ANY)
    print(socket.inet_aton(src_address))

    req = struct.pack("=4s4s", socket.inet_aton(mcast_address), socket.inet_aton(src_address))
    rxsock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, req)



    return  rxsock




s = create_ipv4_sockets()

while (1):
    print("essai de reception")

    buf = s.recvfrom(256)
    print("buf :" +str(buf))