使用PYTHON接收多播数据的代码

首先声明，这不是我写的，而是我找到的，但是别人写的相当好。

# UDP multicast examples, Hugo Vincent, 2005-05-14. 
import socket def send(data, port=50000, addr='239.192.1.100'): 
"""send(data[, port[, addr]]) - multicasts a UDP datagram.""" 
# Create the socket 
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
# Make the socket multicast-aware, and set TTL. 
s.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 20) # Change TTL (=20) to suit 
# Send the data 
s.sendto(data, (addr, port)) 
def recv(port=50000, addr="239.192.1.100", buf_size=1024): 
"""recv([port[, addr[,buf_size]]]) - waits for a datagram and returns the data.""" 
# Create the socket 
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
# Set some options to make it multicast-friendly 
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) 
try: 
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1) 
except AttributeError: 
pass # Some systems don't support SO_REUSEPORT 
s.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_TTL, 20) 
s.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_LOOP, 1) 
# Bind to the port 
s.bind(('', port)) 
# Set some more multicast options 
intf = socket.gethostbyname(socket.gethostname()) 
s.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_IF, socket.inet_aton(intf) + socket.inet_aton('0.0.0.0')) 
s.setsockopt(socket.SOL_IP, socket.IP_ADD_MEMBERSHIP, socket.inet_aton(addr) + socket.inet_aton('0.0.0.0')) 
# Receive the data, then unregister multicast receive membership, then close the port 
data, sender_addr = s.recvfrom(buf_size) 
s.setsockopt(socket.SOL_IP, socket.IP_DROP_MEMBERSHIP, socket.inet_aton(addr) + socket.inet_aton('0.0.0.0')) 
s.close() 
return data

#!/usr/bin/env python 
from socket import *from time import sleep,time,ctime 
HOST = '229.0.0.15'PORT = 9999BUFSIZ = 1024ADDR = (HOST, PORT) 
udpCliSock = socket(AF_INET, SOCK_DGRAM) 
data = 't'*200count = 0while(count<100 ): udpCliSock.sendto(data, ADDR) sleep(1) count = count+1 
udpCliSock.close()