Zip应用

时间：2010-02-02 来源：angelia_liu

Level 6

ZIP document: http://docs.python.org/library/zipfile.html

图片中有一条牛仔裤（拉链的英文名为：zipper)。
Title提示为pair.
源码中有〈!-- 〈-- zip --〉字样。

从http://www.pythonchallenge.com/pc/def/channel.zip 下载zip文件
解压这个ZIP文件，里面有一个readme文件提示：
welcome to my zipped list.
hint1: start from 90052
hint2: answer is inside the zip
从这里可以看出跟Level 4差不多，就是反复从文件中提取下一文件的文件名。

import os
import sys
import re

def get_nextfile(fPath):
    src=open(fPath).read()
    num=re.search('\d+',src)
    if not num:
        print src
        return num.group(1)
    else:
        return num.group(0)

if __name__=='__main__':
    pDir='E:\python challenge\channel'+'\\'
    fileName='90052.txt'
    fPath=pDir+fileName
    for n in range(1000):
        print n
        num=get_nextfile(fPath)
        fPath=pDir+num+'.txt'
        print fPath

执行后显示：
collect the comments

这个comments 就在ZIP文件里面，ZIP有一个对像叫ZipFile.comment。
ZipFile.commentThe comment text associated with the ZIP file. If assigning a comment to a ZipFile instance created with mode ‘a’ or ‘w’, this should be a string no longer than 65535 bytes. Comments longer than this will be truncated in the written archive when ZipFile.close() is called.

import sys
import os
import re
import zipfile

if __name__=='__main__':
    comment=[]
    f=zipfile.ZipFile('E:\python challenge\channel.zip','r')
    nothing='90052'
    nextFile=nothing+'.txt'
    #print zipfile.is_zipfile('E:\python challenge\channel.zip')
    while(1):
        try:
            comment.append(f.getinfo(nextFile).comment)
            nothing=re.search('\d+',f.open(nextFile).read()).group()
            nextFile=nothing+'.txt'
        except:
            break
    f.close() #close zip file
    print ''.join(comment)

也可以利用代码从网站上下载ZIP文件：

from StringIO import StringIO

zobj = StringIO()
zobj.write(urllib.urlopen("http://pythonchallenge.com/pc/def/channel.zip").read())
z = zipfile.ZipFile(zobj)