从lxml中获取文本评论

我正在尝试获取_Comment的内容。我已经研究了如何做，但我不知道如何从td元素访问函数以抓取文本。如果有帮助的话，我使用python Scrapy模块的xpaths。从lxml中获取文本评论

td = None [_Element] 
    <built-in function Comment> = None [_Comment] 
    a = None [_Element]

用于td元件的HTML是：

<table class="crIFrameReviewList"> 

    <tr> 
     <td> 

<!-- BOUNDARY --> 
<a name="R2L4AFEICL8GG6"></a><br /> 


<div style="margin-left:0.5em;"> 

     <div style="margin-bottom:0.5em;"> 
     304 of 309 people found the following review helpful 
     </div> 
     <div style="margin-bottom:0.5em;"> 
     <span style='margin-left: -5px;'><img src="http://g-ecx.images-amazon.com/images/G/01/x-locale/common/customer-reviews/stars-5-0._V192240867_.gif" width="64" alt="5.0 out of 5 stars" title="5.0 out of 5 stars" height="12" border="0" /> </span> 
     <b>Great Travel Zoom</b>, <nobr>April 9, 2014</nobr> 
     </div> 
     <div style="margin-bottom:0.5em;"> 

     <div class="tiny" style="margin-bottom:0.5em;"> 
     <span class="crVerifiedStripe"><b class="h3color tiny" style="margin-right: 0.5em;">Verified Purchase</b><span class="tiny verifyWhatsThis">(<a href="http://www.amazon.com/gp/community-help/amazon-verified-purchase" target="AmazonHelp" onclick="amz_js_PopWin('http://www.amazon.com/gp/community-help/amazon-verified-purchase', 'AmazonHelp', 'width=400,height=500,resizable=1,scrollbars=1,toolbar=0,status=1');return false; ">What's this?</a>)</span></span> 
     </div> 
     <div class="tiny" style="margin-bottom:0.5em;"> 
     <b><span class="h3color tiny">This review is from: </span>Canon PowerShot SX700 HS Digital Camera (Black) (Electronics)</b> 
     </div> 

For the recent few years Canon has made great efforts to improve their travel-zoom compact cameras, and the new SX700 is their next remarkable achievement on that way. It's a little bit bigger than its predecessor (SX280) but it is very well built and has an attractive look and feel (I like the black one). It also got a new front grip which makes one-hand shooting more convenient, even when shooting video, since the Video button was moved from the back to the top and you can now use your thumb solely for holding the camera.<br /><br />Here is a brief list of the new camera pros & cons:<br /><br />PROS:<br />* A very good design and build quality with the attractive finish.<br />* A new powerful 30x optical zoom lens in just a pocket-size body.<br />* Incredible range from 25mm wide to 750mm telephoto for stills and video.<br />* Zoom Framing Assist - very useful new feature to compose your pictures at long telephoto.<br />* Very effective optical Intelligent Image Stabilization for... 


<a href="http://rads.stackoverflow.com/amzn/click/B00I58M26Y" target="_top">Read more</a> 
     <div style="padding-top: 10px; clear: both; width: 100%;">

来源

2014-10-20 robert

你能展示一个你正在处理的HTML吗？另外，所需的输出将有所帮助。 – alecxe 2014-10-20 19:16:37

@alecxe我更新了它的编辑。我已经将html转换为lxml.etree.HTML对象 – robert 2014-10-20 19:31:20

是否有'class =“reviewText”'多个'div'元素？否则，你可以使用''div [@ class =“reviewText”]/text（）''作为你的'xpath'。 – 2014-10-20 19:36:21

查找div与class="reviewText"使用.//div[@class="reviewText"] XPath表达式和转储使用tostring()与text方法的元素串：

import lxml.html 

data = """ 
your html here 
""" 

td = lxml.html.fromstring(data) 
review = td.find('.//div[@class="reviewText"]') 
print lxml.html.tostring(review, method="text")

打印：

54,000 RPM - It has a spinning disk drive that is way beyond our time...I bought 10 of these just for the hard drive, they blow SSD's out of the water. 
Seriously though... how does a well known computer company mistype an important spec?

来源

2014-10-20 19:37:42 alecxe

我编辑它以从亚马逊获得给我的东西。他们为他们的网站实施反刮擦技术，尽管我认为自己在xpaths中体验得很好，但这一点让我感到困惑。最接近我的答案是'<内置函数Comment>'。如果只有我可以访问它。 – robert 2014-10-20 20:10:32

@robert ok，你可以添加你现在使用的代码吗？谢谢。 – alecxe 2014-10-20 20:26:05

从lxml中获取文本评论

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