Python Challenge 6

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Challenge 6

Challenge 6是一件衣服，上面有拉链。页面标题说：“成对了。”图片下面还有Paypal的捐助链接，我开始还真以为这里头有线索，结果它只是一个纯粹的链接。源码里的注释很诚恳：

The following has nothing to do with the riddle itself. I just thought it would be the right point to offer you to donate to the Python Challenge project. Any amount will be greatly appreciated.

-thesamet

注意到，页面源码的开头<-- zip被注释掉了，它指向的是html。试着把URL改为http://www.pythonchallenge.com/pc/def/channel.zip，于是得到了一个压缩包。想必本关的主题就是压缩了。

压缩包内有一个readme.txt，内容为

welcome to my zipped list.

hint1: start from 90052 hint2: answer is inside the zip

其余的文件名都是数字，内容为：“nothing is xxxx”，这与Challenge 4异曲同工。于是从90052开始

import re,zipfile,sys
zf = zipfile.ZipFile("channel.zip")
# Start from 90052
s = "90052"
num_of_files = len(zf.infolist())
print "There are %d files in this zip file." % num_of_files
rule = r'nothing is (\d+)'
for x in range(1, num_of_files+1):
    name = s + ".txt"
    content = zf.read(name)
    nothing = re.findall(rule, content)
    if len(nothing) == 1:
        s = str(nothing[0])
    else:
        print "Interupt by unknown content @ No.%d.\nFilename: %s\nContent:\n%s" % (x, name, content)
        break
zf.close()

输出结果：

There are 910 files in this zip file.
Interupt by unknown content @ No.909.
Filename: 46145.txt
Content:
Collect the comments.

发现了最后一个文件是46145.txt，提示为：“Collect the comments.”笔者一直以为这个comment是指的注释掉的内容，就是上文提到的捐赠的注释。百思不得其解，最后骨哥告诉我，压缩时可以给每一个文件添加comment，就是备注吧。

于是，按照原有的顺序收集所有的备注：

import re,zipfile,sys
zf = zipfile.ZipFile("channel.zip")
# Start from 90052
s = "90052"
num_of_files = len(zf.infolist())
print "There are %d files in this zip file." % num_of_files
rule = r'nothing is (\d+)'
comment = []
for x in range(1, num_of_files+1):
    name = s + ".txt"
    content = zf.read(name)
    nothing = re.findall(rule, content)
    if len(nothing) == 1:
        s = str(nothing[0])
        comment.append(zf.getinfo(name).comment)
    else:
        print "Interupt by unknown content @ No.%d.\nFilename: %s\nContent:\n%s" % (x, name, content)
        break
print ''.join(comment)
zf.close()

最后得到

****************************************************************
****************************************************************
**                                                            **
**   OO    OO    XX      YYYY    GG    GG  EEEEEE NN      NN  **
**   OO    OO  XXXXXX   YYYYYY   GG   GG   EEEEEE  NN    NN   **
**   OO    OO XXX  XXX YYY   YY  GG GG     EE       NN  NN    **
**   OOOOOOOO XX    XX YY        GGG       EEEEE     NNNN     **
**   OOOOOOOO XX    XX YY        GGG       EEEEE      NN      **
**   OO    OO XXX  XXX YYY   YY  GG GG     EE         NN      **
**   OO    OO  XXXXXX   YYYYYY   GG   GG   EEEEEE     NN      **
**   OO    OO    XX      YYYY    GG    GG  EEEEEE     NN      **
**                                                            **
****************************************************************
 **************************************************************

嗯，是HOCKEY，输入URL：http://www.pythonchallenge.com/pc/def/hockey.html，结果它只是说；

it’s in the air. look at the letters.

好吧，看看字母里是什么？还是字母，不过这次是组成HOCKEY的字母：OXYGEN，氧气的确是在空气中：）

输入URL：http://www.pythonchallenge.com/pc/def/oxygen.html，进入Challenge 7

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