why can not parse the web in almost same xpath expression?
python
mailtomanage at 163.com
Thu Feb 21 09:09:19 EST 2013
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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