python：xpath lxml提取数据

<td> <span class="data_lbl updated-daily">P/E Ratio <small class="data_meta">(including extraordinary items)</small></span> <span class="data_data"> <span class="marketDelta deltaType-negative">-69.83</span> </span> </td>

如何以稳健的方式提取数据PE比率数据'-69.83'？我想直接指向市盈率。python：xpath lxml提取数据

from lxml import html 
import requests 

StockData =['AASIA'] 
page_wsj1 = requests.get('http://quotes.wsj.com/MY/'+StockData[x]+'/financials') 
wsj1 = html.fromstring(page_wsj1.content) 
PE = wsj1.xpath('//td[contains(.,"P/E Ratio")]/text()')

但结果是[ ''， ''， ''， ''， '']

wsj1.xpath('//td[normalize-space(span) = "P/E Ratio"]/span[@class = "data_data"]/span/text()')

也导致[]

来源

2016-11-08 vindex

你试过写点什么吗？ – Dekel

这是一个重复的http://stackoverflow.com/questions/40488422/python-get-data-from-changing-span-class-using-lxml-xpath – Markus

你错过了一个'span'。 – Markus

//td[normalize-space(span/text()) = "P/E Ratio"]/span[@class = "data_data"]/span

或

//td[contains(normalize-space(span), "P/E Ratio")]/span[@class = "data_data"]/span

来源

2016-11-08 16:02:15 Markus

谢谢。有用！你可以添加如何使用contains（）？ – vindex

@vindex答案已更新 – Markus

python：xpath lxml提取数据

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