Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.freenet.ag!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!194.109.133.83.MISMATCH!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.109 X-Spam-Level: * X-Spam-Evidence: '*H*': 0.79; '*S*': 0.01; 'output': 0.04; 'subject:same': 0.09; 'subject:not': 0.11; 'skip:f 30': 0.15; 'subject:expression': 0.16; 'urllib': 0.16; 'to:name:python- list@python.org': 0.20; 'import': 0.21; 'message-id:@163.com': 0.22; 'url:2012': 0.30; 'print': 0.32; 'received:220.181.13': 0.33; 'to:addr:python-list': 0.33; "can't": 0.34; 'subject:?': 0.35; 'why': 0.37; 'to:addr:python.org': 0.39; 'url:12': 0.40; 'skip:u 10': 0.60; 'url:p': 0.63; 'url:6': 0.65; 'url:v': 0.68; 'received:122': 0.70; 'url:163': 0.71; 'url:a': 0.72; 'url:4': 0.72; 'url:e': 0.78 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=O+r+o3h1wkeElOZ/cr9Z38/pGAwC0DHVTiF6 LSH92fA=; b=CoBit94IfGnQfG3fr8b0OUtkpM5K3ZQVhytkJya8cx2KHejw2dqP tq/zj+N4fhWws2X4pcFqtTNKnZoK/gIYxAncJqO0lhbiroRVtShk8KK74XWPq01u n44+qgO/2OkF/4Tl8nIGvpApIOkv0HAor0NVscX9EFnuyNtMNi+1U4w= X-Originating-IP: [122.198.132.130] Date: Thu, 21 Feb 2013 22:09:19 +0800 (CST) From: python To: "python-list@python.org" Subject: why can not parse the web in almost same xpath expression? X-Priority: 3 X-Mailer: Coremail Webmail Server Version SP_ntes V3.5 build 20130124(21453.5226.5222) Copyright (c) 2002-2013 www.mailtech.cn 163com X-CM-CTRLDATA: qmajHGZvb3Rlcl9odG09MTYyOTo4MQ== Content-Type: multipart/alternative; boundary="----=_Part_243809_890679402.1361455759942" MIME-Version: 1.0 X-CM-TRANSID: k8GowABnbgqQKiZRyGtfAA--.14234W X-CM-SenderInfo: hpdlz3xrpd0tljh6il2tof0z/1tbisAnKPFEAAeQJuwABsI 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: 45 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1361455778 news.xs4all.nl 6986 [2001:888:2000:d::a6]:52145 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:39428 ------=_Part_243809_890679402.1361455759942 Content-Type: text/plain; charset=GBK Content-Transfer-Encoding: 7bit import urllib import lxml.html down='http://v.163.com/special/visualizingdata/' file=urllib.urlopen(down).read() root=lxml.html.document_fromstring(file) urllist=root.xpath('//div[@class="down s-fc3 f-fl"]//a') for url in urllist: print url.get("href") i get the 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 when i change xpath('//div[@class="down s-fc3 f-fl"]//a') into xpath('//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') why i can't get nothing? ------=_Part_243809_890679402.1361455759942 Content-Type: text/html; charset=GBK Content-Transfer-Encoding: 7bit
    import urllib
    import lxml.html
    down='http://v.163.com/special/visualizingdata/'
    file=urllib.urlopen(down).read()
    root=lxml.html.document_fromstring(file)
    urllist=root.xpath('//div[@class="down s-fc3 f-fl"]//a') 
    for url in urllist:
         print url.get("href")
  
i get the 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  
  
when i change   

    xpath('//div[@class="down s-fc3 f-fl"]//a')
   
into   

    xpath('//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')  

why i can't get nothing? 


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