用美丽的汤刮论坛 - 如何排除引用的回复

Question

这是我第一次使用美丽的汤或进行网页抓取。我对自己到目前为止所取得的成就感到非常高兴，但我遇到了一些障碍。

我正在尝试抓取特定线程上的所有帖子。但是，我想从引用的答复中排除文本。

举个例子：

我想从这些帖子中抓取文本，而不抓取红框中指示区域内的文本。

在

html中，我要排除的部分在我需要为消息选择的部分内，这就是我遇到困难的原因。我已经包含了html的屏幕截图

网页图片

<div id="post_message_39096267"><!-- google_ad_section_start --><div style="margin:20px; margin-top:5px; ">
<div class="smallfont" style="margin-bottom:2px">Quote:</div>
<table cellpadding="6" cellspacing="0" border="0" width="100%">
<tbody><tr>
    <td class="alt2" style="border:1px inset">
            <div>
                Originally Posted by <strong>SAAN</strong>
                <a href="http://www.city-data.com/forum/economics/2056372-minimum-wage-vs-liveable-wage-post33645660.html#post33645660" rel="nofollow"><img class="inlineimg li fs-viewpost" src="http://pics3.city-data.com/trn.gif" border="0" alt="View Post" title="View Post"></a>
            </div>
            <div style="font-style:italic">I agree with trying to buy a 
cheap car outright, the problem is everyone I know that has done that $2-
5000 car, always ended up with these huge repair bills that are equivalent 
to car payments.  Most cars after 100K will need all sort of regulatr 
maintance that is easily a $200 repair to go along with anything that may 
break which is common with cars as they age.<br>
<br>
I have a 2yr old im making payments on and 14yr old car that is paid off, 
but needs $2000 in maintenance.  When car shopping this summer, I saw many 
cars i could buy outright, but after adding u everything needed to make sure 
it needs nothing, your back into the price range of a car payment.</div>
    </td>
</tr>
</tbody></table>
</div>Depends on how long the car loan would be stretched. Just because you 
can get an 8 year loan and reduce payments to a level like the repairs on 
your old car doesn't make it a good idea, especially for new cars that <a 
href="/knowledge/Depreciation.html" title="View 'depreciate' definition from 
Wikipedia" class="knldlink" rel="nofollow">depreciate</a> quickly. You'd 
just be putting yourself into negative equity territory.<!-- 
google_ad_section_end --></div>

我在下面包含了我的代码： 希望这能帮助你理解我在说什么。

from bs4 import BeautifulSoup
import urllib2

num_pages = 101
page_range = range(1,num_pages+1)
clean_posts = []
for page in page_range:
  print("Reading page: ", page, "...")
  if page == 1:
    page_url = urllib2.urlopen('http://www.city-data.com/forum/economics/2056372-minimum-wage-vs-liveable-wage.html')
  else:
    page_url = urllib2.urlopen('http://www.city-data.com/forum/economics/2056372-minimum-wage-vs-liveable-wage'+'-'+str(page)+'.html')

soup = BeautifulSoup(page_url)
postData = soup.find_all("div", id=lambda value: value and value.startswith("post_message_"))
posts = []
for post in postData:
    posts.append(BeautifulSoup(str(post)).get_text().encode("utf-8").strip().replace("t", ""))
posts_stripped = [x.replace("n","") for x in posts]
clean_posts.append(posts_stripped)

最后，如果您能给我一些代码示例，说明什么可以工作并向我解释什么，就好像我真的是 9 岁一样，我将不胜感激！

干杯迪尔迈德

Answer 1

检查您的post_message_div 内部是否有另一个div(引号div(。如果是这样，请提取它。将原始div (post_message_( 文本附加到列表中。将您的for post in postData替换为此。

posts = []
for post in postData:
    hasQuote = post.find("div")
     if not hasQuote is None:
        hasQuote.extract()
    posts.append(post.get_text(strip=True))