python - lxml 获取元素的完整扩展名

Question

我有以下 xml:

<text>test<br/><br/><a href="/nature/19700707">All you need to know about British birds.</a><br/></text>

我希望设置标签<text>的全部内容至11111

我正在使用 pythong 和 lxml，以下是我的代码:

import nltk
import lxml.etree as le
current_file = '/Users/noor/Dropbox/apps/APIofLife/src/clear_description/bird.rdf'
f = open(current_file,'r')
doc=le.parse(f)
for elem in doc.xpath("//text"):
        elem.text = "11111"
f.close()
f = open(current_file,'w')
f.write(le.tostring(doc))
f.close()

但是，运行上述代码后，我的结果是:

<text>11111<br/><br/><a href="/nature/19700707">All you need to know about British birds.</a><br/></text>

我想知道为什么标签的全部内容是<text>尚未更改为11111

Answer 1

根据lxml.etree._Element documentation , text 属性对应于第一个子元素之前的文本。

您需要删除子元素:

>>> import lxml.etree as le
>>>
>>> root = le.fromstring('''<text>test<br/><br/>
... <a href="/nature/19700707">All you need to know about British birds.</a>
... <br/></text>''')
>>> for elem in root.xpath("//text"):
...     elem.text = '1111'
...     del elem[:]  # <----------
...
>>> le.tostring(root)
'<text>1111</text>'