你如何在Python中UDP多播？

import socket
import struct

MULTICAST_GROUP = '224.1.1.1'  # 多播组地址
MULTICAST_PORT = 5007
TTL = 2  # 时间跳数

message = "Hello, Multicast!"

# 创建UDP套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)

# 设置TTL
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, struct.pack('b', TTL))

# 发送多播数据报
sock.sendto(message.encode('utf-8'), (MULTICAST_GROUP, MULTICAST_PORT))

import socket
import struct

MULTICAST_GROUP = '224.1.1.1'  # 多播组地址
MULTICAST_PORT = 5007

# 创建UDP套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)

# 允许多个套接字复用端口
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

# 绑定本地地址和端口
sock.bind(('0.0.0.0', MULTICAST_PORT))

# 加入多播组
group_bin = socket.inet_aton(MULTICAST_GROUP)
mreq = struct.pack('=4sl', group_bin, socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

# 接收多播数据报
data, address = sock.recvfrom(1024)
print(f"Received data: {data.decode('utf-8')} from {address}")

# 离开多播组
sock.setsockopt(socket.IPPROTO_IP, socket.IP_DROP_MEMBERSHIP, mreq)

# 关闭套接字
sock.close()