PythonChallenge 挑战之路 Level-20

这一关没有头绪，参考了别人的线索才整出来了……

import urllib,re
url = 'http://butter:fly@www.pythonchallenge.com/pc/hex/unreal.jpg'
#start = 30203
#start = 2123456743
start = 1152983631
end = 2123456789
find = re.compile(r'bytes \d*-(\d*)')
while start<end:
opener = urllib.FancyURLopener()
opener.addheader('Range','bytes=%d-%d' % (start,end))
f = opener.open(url)
start = re.findall(find,str(f.info()))
if len(start)>0:
start = int(start[0])+1
#print f.info()
open(r'F:\Python challenge\out20.zip','wb').write(f.read());break从30203开始，显示为：
Why don't you respect my privacy?

we can go on in this way for really long time.

stop this!

invader! invader!

ok, invader. you are inside now. 

从2123456743开始，显示为：

and it is hiding at 1152983631.

esrever ni emankcin wen ruoy si drowssap eht

最后从1152983631开始，可以下载一段文件,解压密码就是invader颠倒过来：redavni

打开压缩包就过关了。