sum([n for n in range(1000) if n%3==0 or n%5==0])

# ruby
l=92.chr;eval s="s=s.dump[r=1..-2].gsub(/("+l*4+"){4,}(?!\")/){|t|'\"+l*%d+\"'%(t
.size/2)};5.times{s=s.dump[r]};puts\"# python\\nprint(\\\"# perl\\\\nprint(\\\\\\
\"# lua"+l*4+"nprint("+l*7+"\"(* ocaml *)"+l*8+"nprint_endline"+l*15+"\"-- haskel
l"+l*16+"nimport Data.List;import Data.Bits;import Data.Char;main=putStrLn("+l*31
+"\"/* C */"+l*32+"n#include<stdio.h>"+l*32+"nint main(void){char*s[501]={"+l*31+
"\"++intercalate"+l*31+"\","+l*31+"\"(c(tail(init(show("+l*31+"\"/* Java */"+l*32
+"npublic class QuineRelay{public static void main(String[]a){String[]s={"+l*31+"
\"++intercalate"+l*31+"\","+l*31+"\"(c("+l*31+"\"brainfuck"+l*64+"n++++++++[>++++
<-]+++++++++>>++++++++++"+l*31+"\"++(concat(snd(mapAccumL h 2("+l*31+"\"110"+l*31
+"\"++g(length s)++"+l*31+"\"22111211100111112021111102011112120012"+l*31+"\"++co
ncatMap("+l*32+"c->let d=ord c in if d<11then"+l*31+"\"21002"+l*31+"\"else"+l*31+
"\"111"+l*31+"\"++g d++"+l*31+"\"22102"+l*31+"\")s++"+l*31+"\"2100211101012021122
2211211101000120211021120221102111000110120211202"+l*31+"\"))))))++"+l*31+"\","+l
*63+"\""+l*64+"n"+l*63+"\"};int i=0;for(;i<94;i++)System.out.print(s[i]);}}"+l*31
+"\")))))++"+l*31+"\",0};int i=0;for(;s[i];i++)printf("+l*63+"\"%s"+l*63+"\",s[i]
);puts("+l*63+"\""+l*63+"\");return 0;}"+l*31+"\");c s=map("+l*32+"s->"+l*31+"\""
+l*63+"\""+l*31+"\"++s++"+l*31+"\""+l*63+"\""+l*31+"\")(unfoldr t s);t[]=Nothing;
t s=Just(splitAt(if length s>w&&s!!w=='"+l*31+"\"'then 501else w)s);w=500;f 0=Not
hing;f x=Just((if x`mod`2>0then '0'else '1'),x`div`2);g x= reverse (unfoldr f x);
h p c=let d=ord c-48in(d,replicate(abs(p-d))(if d<p then '<'else '>')++"+l*31+"\"
."+l*31+"\");s="+l*31+"\"# ruby"+l*32+"n"+l*31+"\"++"+l*31+"\"l=92.chr;eval s=\"+
(z=l*31)+\"\\\"\"+s+z+\"\\\""+l*31+"\"++"+l*31+"\""+l*32+"n"+l*31+"\""+l*15+"\""+
l*7+"\")"+l*4+"n\\\\\\\")\\\")\"########### (c) Yusuke Endoh, 2009 ###########\n"

RewriteEngine on
DirectoryIndex index.cgi
RewriteCond %{REQUEST_URI} !(index.cgi)
RewriteRule ^(.*)$ index.cgi/$1 [L]

#!/bin/bash
 
#下面这两行头一定要有，不然可是会引发 500 Internal Server Error 错误的。
echo "Content-type: text/html"
echo ""
 
echo "<h1>Bash CGI works!</h1>"
env | while read line;do
	echo "<b>"
	echo "$line" | cut -d= -f 1
	echo "</b>=<i>"
	echo "$line" | cut -d= -f 2-
	echo "</i><br>"
done

>>> import poplib
>>> p=poplib.POP3_SSL('pop.gmail.com')  #如果服务器不需要启用SSL，那么只需要用 poplib.POP3('xxx.com') 就好了。
>>> p.user('linuxcn.ibot')
'+OK send PASS'
>>> p.pass_('密码')
'+OK Welcome.'
>>> p.stat() #统计状态，返回一个元组，第一个表示几封邮件，第二个表示一共几个字节
(2, 4543)
>>> p.list() #返回每个邮件的状态
('+OK 2 messages (4543 bytes)', ['1 3679', '2 864'], 15)
>>> p.retr(2) #获取某个邮件的全文，这个邮件就是我自己给另一个测试账号发的邮件，元组里包含了邮件头和邮件的正文。
('+OK message follows', ['Delivere
...为了排版方便，此处有删节...
e--'], 869)
>>> mailsrc='\n'.join([l for l in p.retr(2)[1]])
>>> print mailsrc #如果上面还看不出啥的话，这样看应该就明显了。
Delivered-To: linuxcn.ibot@gmail.com
Received: by 10.216.47.83 with SMTP id s61cs422102web;
        Sat, 15 Aug 2009 07:58:32 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.114.180.16 with SMTP id c16mr2819847waf.57.1250348310512; Sat, 
	15 Aug 2009 07:58:30 -0700 (PDT)
Date: Sat, 15 Aug 2009 22:58:30 +0800
Message-ID: <ae14629e0908150758n49649527xf326b8c1a60f36bf@mail.gmail.com>
Subject: =?UTF-8?B?5rWL6K+V5Li76aKY?=
From: LLY <bones7456@gmail.com>
To: linuxcn.ibot@gmail.com
Content-Type: multipart/alternative; boundary=001636417e2fe4c3a904712f669e
 
--001636417e2fe4c3a904712f669e
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: base64
 
5rWL6K+V5q2j5paHCg==
--001636417e2fe4c3a904712f669e
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: base64
 
5rWL6K+V5q2j5paHPGJyPgo=
--001636417e2fe4c3a904712f669e--
>>> p.quit() #收完邮件了，理论上是要退出一下的
'+OK Farewell.'
>>> import email #源码得到了，现在轮到email模块登场了
>>> e=email.message_from_string(mailsrc) #这个就可以把邮件源码转换成一个email的对象了。
>>> print e['subject'] #这个是编码后的主题
=?UTF-8?B?5rWL6K+V5Li76aKY?=
>>> print email.header.decode_header(e['subject'])[0][0] #这个是解码后的主题
测试主题
>>> e.get_payload() #获取当前email的有效部分，可以看到有这个邮件有两个部分，从上面的邮件源码，我们也可以得知，此邮件确实有text/plain 和 text/html 两部分
[<email.message.Message instance at 0xb751102c>, <email.message.Message instance at 0xb751172c>]
>>> e.get_payload(0) #获取有效部分的第一个，这个还是一个email对象的实例。
<email.message.Message instance at 0xb751102c>
>>> type(e)
<type 'instance'>
>>> type(e.get_payload(0))
<type 'instance'>
>>> import base64 #解码邮件正文还得用上base64模块
>>> print base64.decodestring(e.get_payload(0).get_payload()) #解码正文的第一部分
测试正文
 
>>> print base64.decodestring(e.get_payload(1).get_payload()) #解码正文的第二部分，是html，看来只多了个br而已，哈哈
测试正文<br>

>>> import smtplib #加载模块
>>> msg='To: linuxcn.ibot@gmail.com\r\nFrom: my@localhost\r\nSubject: test\r\n\r\nthis is msg body\r\n' #邮件的源码
>>> s=smtplib.SMTP('smtp.163.com') #同样这里也有SMTP_SSL，到底用什么要看服务器的设置
>>> s.login('bones7456','密码') #一般都要登录了，才能发邮件，login里提供两个参数，用户名和密码
(235, 'Authentication successful')
>>> s.sendmail('bones7456@163.com','linuxcn.ibot@gmail.com',msg) #发送邮件，三个参数分别是 from/to/msg，就这名简单就成功了。。
{}
>>> s.quit()
(421, 'closing transmission channel')

make && make install

#!/usr/bin/env python
import sys,ipc
 
if len(sys.argv)==5 and sys.argv[3][0]=='s':
    ipc_key=int(sys.argv[1])
    msg_id = ipc.msgget(ipc_key,0666|ipc.IPC_CREAT)
    if 0 > msg_id:
        sys.exit(1)
    mbuf = ipc.msgbuf()
    mbuf.mtype = int(sys.argv[2])
    mbuf.mtext = sys.argv[4]
    if 0 > ipc.msgsnd(msg_id,mbuf,len(mbuf.mtext),0):
        sys.exit(3)
    print 'Send Success.'
elif len(sys.argv)==4 and sys.argv[3][0]=='r':
    ipc_key=int(sys.argv[1])
    mbuf = ipc.msgbuf()
    msg_id = ipc.msgget(ipc_key,0666)
    if 0 > msg_id:
        sys.exit(1)
    msg_len=ipc.msgrcv(msg_id,mbuf,2048,int(sys.argv[2]),ipc.IPC_NOWAIT)
    if 0 > msg_len:
        print 'No message received.'
        sys.exit(3)
    else:
        print 'Recv Success.(%d bytes):'% msg_len
        print mbuf.mtext
elif len(sys.argv)==3 and sys.argv[2][0]=='c':
    ipc_key=int(sys.argv[1])
    id_dsp = ipc.msqid_ds()
    msg_id = ipc.msgget(ipc_key,0666)
    if 0 > msg_id:
        sys.exit(1)
    if 0 > ipc.msgctl(msg_id,ipc.IPC_RMID,id_dsp):
        sys.exit(2)
else:
    print "usage: \n%s key type s message --to send message\n\
%s key type r --to receive\n\
%s key c --to clear queue"\
        %(sys.argv[0],sys.argv[0],sys.argv[0])

lily@LLY:~/test/ipc$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
 
lily@LLY:~/test/ipc$ ./ipc_msg.py 1 2 s abc
Send Success.
lily@LLY:~/test/ipc$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
0x00000001 65536      lily       666        3            1           
 
lily@LLY:~/test/ipc$ ./ipc_msg.py 1 2 r
Recv Success.(3 bytes):
abc
lily@LLY:~/test/ipc$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
0x00000001 65536      lily       666        0            0           
 
lily@LLY:~/test/ipc$ ./ipc_msg.py 1 c
lily@LLY:~/test/ipc$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
 
lily@LLY:~/test/ipc$

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/msg.h>
 
int main(int argc, char *argv[]){
	int ipc_key,msg_id,msg_len;
	long mtype;
	void * mbuf;
	if(argc==5 && argv[3][0]=='s'){
		ipc_key=atoi(argv[1]);
		mtype=atol(argv[2]);
		msg_len=strlen(argv[4]);
		if ( 0>(msg_id=msgget(ipc_key, 0666|IPC_CREAT)))return 1;
		if ( NULL==(mbuf=malloc(msg_len+sizeof(long)+1)) )return 2;
		memcpy(mbuf, (void *)&mtype, sizeof(long) );
		memcpy(mbuf+sizeof(long), (void *)argv[4], msg_len );
		if ( 0>msgsnd(msg_id, (struct msgbuf *)mbuf, msg_len, 0) )return 3;
		printf("Send Success.n");
	}else if(argc==4 && argv[3][0]=='r'){
		ipc_key=atoi(argv[1]);
		mtype=atol(argv[2]);
		if ( 0>(msg_id=msgget(ipc_key, 0666)))return 1;
		if ( NULL==(mbuf=malloc(4096)) )return 2;
		if ( 0>(msg_len=msgrcv(msg_id,(struct msgbuf *)mbuf, 4000, mtype, IPC_NOWAIT))){
			printf("No message received.n");
			return 3;
		}
		printf("Recv Success.(%d bytes):n",msg_len);
		printf("%sn",(char *)(mbuf+sizeof(long)));
	}else if(argc==3 && argv[2][0]=='c'){
		ipc_key=atoi(argv[1]);
		if ( 0>(msg_id=msgget(ipc_key, 0666)))return 1;
		if ( 0>msgctl(msg_id,IPC_RMID,(struct msqid_ds *)mbuf) )return 2;
	}else{
		printf("usage:"
			"%s key type s message --to send messagen"
			"%s key type r --to receiven"
			"%s key c --to clear queuen"
			,argv[0],argv[0],argv[0]);
	}
	return 0;
}

$ gcc -o ipc_msg ipc_msg.c
#编译
$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
#一开始系统中没有消息队列。
$ ./ipc_msg  1 2 s abc
Send Success.
#发送了一个内容为abc的消息
$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
0x00000001 262144     lily       666        3            1           
#发送了一个消息以后，队列里有消息了，key是1,有3个字节。
$ ./ipc_msg  1 2 r
Recv Success.(3 bytes):
abc
#从消息队列成功收到消息了。
$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
0x00000001 262144     lily       666        0            0           
#收完以后，空的消息队列仍然存在，不会自动消失。
 
$ ./ipc_msg  1 c
#删除队列
$ ipcs -q
 
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages    
#成功删除了，回到原始状态。

sum([n for n in range(1000) if n%3==0 or n%5==0])