Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.020 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'say,': 0.05; 'run,': 0.07; 'modules.': 0.09; 'padding:': 0.09; 'skip:f 30': 0.15; "'courier": 0.16; '10px;': 0.16; 'baseline;': 0.16; 'border:': 0.16; 'code?': 0.16; 'max-height:': 0.16; 'menlo,': 0.16; 'monaco,': 0.16; 'monospace,': 0.16; "new',": 0.16; 'overflow:': 0.16; 'skip:1 40': 0.16; 'skip:1 60': 0.16; 'subject:expression': 0.16; 'urllib': 0.16; 'skip:u 30': 0.17; 'to:name:python-list@python.org': 0.20; 'import': 0.21; 'message-id:@163.com': 0.22; 'url:2012': 0.30; 'auto;': 0.30; 'print': 0.32; 'skip:s 30': 0.33; 'received:220.181.13': 0.33; 'shorter': 0.33; 'to:addr:python- list': 0.33; 'code:': 0.33; 'skip:u 20': 0.36; 'to:addr:python.org': 0.39; 'url:12': 0.40; 'skip:u 10': 0.60; 'strange': 0.62; 'url:p': 0.63; 'here': 0.65; 'url:6': 0.65; 'url:v': 0.68; 'received:122': 0.70; 'receive': 0.71; 'sans': 0.71; 'url:163': 0.71; 'url:a': 0.72; 'url:4': 0.72; 'url:e': 0.78; "'lucida": 0.84; 'rgb(238,': 0.84; 'vera': 0.84 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Received:Date:From:To:Subject:Content-Type: MIME-Version:Message-ID; bh=keP7amV0yaLA8EIYkQxuZWrKoinj17iKJPk+ H8E0K2Q=; b=AqsqPMnoTb+WMwJiFnqyy0Rak/DFIKxakLvFqFptG4W38HGP32Zc 4+JB3vh4z8+mbNO3pNrEU7RyUhEzqUwnFEDbWIuhxoJ0R4uIor67j8P4SmdqTpdx 79lqWwxyWISF5tCD+htz6nfKk8Zc29Vteitp8A//x8AiGsldKMuqH+Q= X-Originating-IP: [122.198.132.248] Date: Fri, 22 Feb 2013 09:24:09 +0800 (CST) From: python To: "python-list@python.org" Subject: Issues a longer xpath expression X-Priority: 3 X-Mailer: Coremail Webmail Server Version SP_ntes V3.5 build 20130201(21528.5249.5248) Copyright (c) 2002-2013 www.mailtech.cn 163com X-CM-CTRLDATA: 8HC8wmZvb3Rlcl9odG09MTcxMzA6ODE= Content-Type: multipart/alternative; boundary="----=_Part_29430_252607125.1361496249733" MIME-Version: 1.0 X-CM-TRANSID: RcGowEDJx0K6yCZRuJJMAA--.4793W X-CM-SenderInfo: hpdlz3xrpd0tljh6il2tof0z/1tbisAzLPFEAAexv9AABst X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 59 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1361497179 news.xs4all.nl 6854 [2001:888:2000:d::a6]:60555 X-Complaints-To: abuse@xs4all.nl Path: csiph.com!usenet.pasdenom.info!news.stben.net!border3.nntp.ams.giganews.com!border1.nntp.ams.giganews.com!nntp.giganews.com!xlned.com!feeder1.xlned.com!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Xref: csiph.com comp.lang.python:39511 ------=_Part_29430_252607125.1361496249733 Content-Type: text/plain; charset=GBK Content-Transfer-Encoding: 7bit I am having issues with the urllib and lxml.html modules. Here is my original code: import urllib import lxml.html down='http://v.163.com/special/visualizingdata/' file=urllib.urlopen(down).read() root=lxml.html.document_fromstring(file) xpath_str="//div[@class='down s-fc3 f-fl']/a" urllist=root.xpath(xpath_str)for url in urllist:print url.get("href") When run, it returns this output: http://mov.bn.netease.com/movieMP4/2012/12/A/7/S8H1TH9A7.mp4 http://mov.bn.netease.com/movieMP4/2012/12/D/9/S8H1ULCD9.mp4 http://mov.bn.netease.com/movieMP4/2012/12/4/P/S8H1UUH4P.mp4 http://mov.bn.netease.com/movieMP4/2012/12/B/V/S8H1V8RBV.mp4 http://mov.bn.netease.com/movieMP4/2012/12/6/E/S8H1VIF6E.mp4 http://mov.bn.netease.com/movieMP4/2012/12/B/G/S8H1VQ2BG.mp4 But, when I change the line xpath_str='//div[@class="down s-fc3 f-fl"]//a' into xpath_str='//div[@class="col f-cb"]//div[@class="down s-fc3 f-fl"]//a' that is to say, urllist=root.xpath('//div[@class="col f-cb"]//div[@class="down s-fc3 f-fl"]//a') I do not receive any output. What is the flaw in this code? it is so strange that the shorter one can work,the longer one can not,they have the same xpath structure! ------=_Part_29430_252607125.1361496249733 Content-Type: text/html; charset=GBK Content-Transfer-Encoding: 7bit

I am having issues with the urllib and lxml.html modules.

Here is my original code:

import urllib  
import lxml.html  
down='http://v.163.com/special/visualizingdata/'  
file=urllib.urlopen(down).read()  
root=lxml.html.document_fromstring(file)
xpath_str="//div[@class='down s-fc3 f-fl']/a"  
urllist=root.xpath(xpath_str)  
for url in urllist:  
  print url.get("href")

When run, it returns this output:

http://mov.bn.netease.com/movieMP4/2012/12/A/7/S8H1TH9A7.mp4  
http://mov.bn.netease.com/movieMP4/2012/12/D/9/S8H1ULCD9.mp4  
http://mov.bn.netease.com/movieMP4/2012/12/4/P/S8H1UUH4P.mp4  
http://mov.bn.netease.com/movieMP4/2012/12/B/V/S8H1V8RBV.mp4  
http://mov.bn.netease.com/movieMP4/2012/12/6/E/S8H1VIF6E.mp4  
http://mov.bn.netease.com/movieMP4/2012/12/B/G/S8H1VQ2BG.mp4

But, when I change the line

xpath_str='//div[@class="down s-fc3 f-fl"]//a'

into

xpath_str='//div[@class="col f-cb"]//div[@class="down s-fc3 f-fl"]//a'

that is to say,

urllist=root.xpath('//div[@class="col f-cb"]//div[@class="down s-fc3 f-fl"]//a')

I do not receive any output. What is the flaw in this code?
it is so strange that the shorter one can work,the longer one can not,they have the same xpath structure!



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