使用 lxml 向现有元素添加属性、删除元素等

发布于 2024-09-08 20:11:01 字数 393 浏览 1 评论 0原文

我使用“

from lxml import etree

tree = etree.parse('test.xml', etree.XMLParser())

现在我想处理已解析的 XML”来解析 XML。我在删除具有命名空间的元素或仅删除一般元素时遇到问题，例如

<rdf:description><dc:title>Example</dc:title></rdf:description>

我想删除整个元素以及标签内的所有内容。我还想向现有元素添加属性。我需要的方法位于 Element 类中，但我不知道如何将其与此处的 ElementTree 对象一起使用。任何指点都将不胜感激，谢谢

原文

I parse in the XML using

from lxml import etree

tree = etree.parse('test.xml', etree.XMLParser())

Now I want to work on the parsed XML. I'm having trouble removing elements with namespaces or just elements in general such as

<rdf:description><dc:title>Example</dc:title></rdf:description>

and I want to remove that entire element as well as everything within the tags. I also want to add attributes to existing elements as well. The methods I need are in the Element class but I have no idea how to use that with the ElementTree object here. Any pointers would definitely be appreciated, thanks

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

扬花落满肩 2024-09-15 20:11:01

您可以通过以下调用获取根元素：root=tree.getroot()

使用该根元素，您可以使用 findall() 并删除符合您条件的元素：

deleteThese = root.findall("title")
for element in deleteThese: root.remove(element)

最后，您可以使用以下命令查看新树的外观： etree.tostring(root, Pretty_print=True)

以下是有关 find/findall 如何工作的一些信息：
http://infohost.nmt.edu/tcc /help/pubs/pylxml/class-ElementTree.html#ElementTree-find

要向元素添加属性，请尝试如下操作：

root.attrib['myNewAttribute']='hello world'

You can get to the root element via this call: root=tree.getroot()

Using that root element, you can use findall() and remove elements that match your criteria:

deleteThese = root.findall("title")
for element in deleteThese: root.remove(element)

Finally, you can see what your new tree looks like with this: etree.tostring(root, pretty_print=True)

Here is some info about how find/findall work:
http://infohost.nmt.edu/tcc/help/pubs/pylxml/class-ElementTree.html#ElementTree-find

To add an attribute to an element, try something like this:

root.attrib['myNewAttribute']='hello world'

回复收藏 0 原文

一曲爱恨情仇 2024-09-15 20:11:01

remove 方法应该执行您想要的操作：

>>> from lxml import etree
>>> from StringIO import StringIO

>>> s = '<Root><Description><Title>foo</Title></Description></Root>'
>>> tree = etree.parse(StringIO(s))

>>> print(etree.tostring(tree.getroot()))
<Root><Description><Title>foo</Title></Description></Root>

>>> title = tree.find('//Title')
>>> title.getparent().remove(title)
>>> etree.tostring(tree.getroot())
'<Root><Description/></Root>'

>>> print(etree.tostring(tree.getroot()))
<Root><Description/></Root>

The remove method should do what you want:

>>> from lxml import etree
>>> from StringIO import StringIO

>>> s = '<Root><Description><Title>foo</Title></Description></Root>'
>>> tree = etree.parse(StringIO(s))

>>> print(etree.tostring(tree.getroot()))
<Root><Description><Title>foo</Title></Description></Root>

>>> title = tree.find('//Title')
>>> title.getparent().remove(title)
>>> etree.tostring(tree.getroot())
'<Root><Description/></Root>'

>>> print(etree.tostring(tree.getroot()))
<Root><Description/></Root>

回复收藏 0 原文

~没有更多了~