Network Byte Order : struct « Buildin Module « Python Tutorial

1. Python Tutorial
2. Buildin Module
3. struct

#!/usr/bin/env python


import struct, sys

def htons(num):
    return struct.pack('!H', num)

def htonl(num):
    return struct.pack('!I', num)

def ntohs(data):
    return struct.unpack('!H', data)[0]

def ntohl(data):
    return struct.unpack('!I', data)[0]

def sendstring(data):
    return htonl(len(data)) + data

print "Enter a string:"
str = sys.stdin.readline().rstrip()

print repr(sendstring(str))