使用Python中的BeautifulSoup从XML中的嵌套标签中提取文本

Question

我正在尝试从嵌套标签中提取文本，例如 xml 的格式为：

<thread id = 1_1>
  <post id = 1>
    <title>
      <ne>MediaPortal</ne> Install Guide
    </title>
    <content>
      <ne>MediaPortal</ne> Install Guide 0. Introduction and pre-requisites 
      <ne>MediaPortal</ne> is an open-source and free full-fledged <ne>HTPC</ne>
      front-end. It does everything you can ask for in a media center: video 
      playback, music playback, photo viewing, weather, TV tuning and recording, 
      etc. It has wide community support and thanks to it's excellent plug-in 
      and  skinning framework, there are lots of community-developed extensions 
      you can  pick and choose to make it your own. It is far more configurable 
      than <ne>Windows Media Center</ne>, and it works out-of-the-box with the 
      <ne>MCE</ne> remote. And because it provides so much more configuration 
      some find it a daunting task to install and configure. Therefore, this 
      guide will help alleviate some of that burden and help get a 
      <ne>MediaPortal</ne> installation up &amp; running. This guide is not 
      intended to replace the wonderful <ne>MediaPortal</ne> documentation, but 
      rather to introduce the AVS community to <ne>MediaPortal</ne> and provide
      a quick and easy set-up guide. If you need more details on configuration
    </content>
  </post>
</thread>

我需要提取标签内的数据并将其保存在单独的文件中。我能够做到这一点，然后我从美丽的汤对象中提取标签。现在，我想从 和 标签中提取文本并将其放入单独的文件中。请给出一些如何实现这一目标的建议。

从汤对象中提取标签后，如果我这样做

for title in soup.find('title')
   print title.string

，那么在提取标签之前，它会在控制台上为具有标签的标题标签提供 None 。

Answer 1

来自 BeautifulSoup 文档：

For your convenience, if a tag has only one child node,
and that child node is a string,the child node is made
available as tag.string, as well as tag.contents[0].

但是，在您的情况下：

>>> t = soup.find('title')
<title><ne>MediaPortal</ne> Install Guide</title>

因此，在您的情况下，您不能使用 tag.string。但是，您仍然可以使用 tag.contents 或 tag.text：

>>> t.contents
[<ne>MediaPortal</ne>, u' Install Guide']
>>> t.text
u'MediaPortalInstall Guide'