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POIssues a longer xpath expression
 

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  1. POIssues a longer xpath expression
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    <p>I am having issues with the <code>urllib</code> and <code>lxml.html</code> modules.</p> <p>Here is my original code:</p> <pre><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") </code></pre> <p>When run, it returns this output: </p> <pre><code>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 </code></pre> <p>But, when I change the line </p> <p><code>xpath_str='//div[@class="down s-fc3 f-fl"]//a'</code></p> <p>into </p> <p><code>xpath_str='//div[@class="col f-cb"]//div[@class="down s-fc3 f-fl"]//a'</code> </p> <p>that is to say, </p> <pre><code>urllist=root.xpath('//div[@class="col f-cb"]//div[@class="down s-fc3 f-fl"]//a') </code></pre> <p>I do not receive any output. What is the flaw in this code?<br> it is so strange that the shorter one can work,the longer one can not,they have the same xpath structure!</p> <p>open the web '<a href="http://v.163.com/special/visualizingdata/" rel="nofollow noreferrer">http://v.163.com/special/visualizingdata/</a>' in firefox ,you can see the html structure with firebug.</p> <p><img src="https://i.stack.imgur.com/FDwtF.png" alt="enter image description here"></p>
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    1. PTQuestion
    1. USit_is_a_literature
    1. USit_is_a_literature
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      1. POIssues a longer xpath expression
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      1. VTApproveEditSuggestion
    1. COPlease post some sample HTML/XML that this is supposed to parse.
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      1. USFred Foo
    2. CO@larsmans the URL from the code, apparently
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      1. USwRAR
    3. CO@wRAR I'm not going to open that, no idea what it is.
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      1. USFred Foo
 

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