发布于 2014-09-22 14:19:41 | 261 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Python3 官方中文指南，程序狗速度看过来！
Python编程语言
Python 是一种面向对象、解释型计算机程序设计语言，由Guido van Rossum于1989年底发明，第一个公开发行版发行于1991年。Python语法简洁而清晰，具有丰富和强大的类库。它常被昵称为胶水语言，它能够把用其他语言制作的各种模块（尤其是C/C++）很轻松地联结在一起。
本文是一个PYTHON脚本实现的能够在LINUX上发送多播数据。其实编制起来也不算太麻烦。具体代码如下,感兴趣的同学参考下.
# 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()