問(wèn)題描述

我正在嘗試使用 xml.etree.ElementTree 來(lái)解析一個(gè) xml 文件，找到一個(gè)特定的標(biāo)簽，將一個(gè)子附加到該標(biāo)簽，將另一個(gè)子附加到新創(chuàng)建的標(biāo)簽，并將文本添加到后一個(gè)子.

I am trying to use xml.etree.ElementTree to parse a xml file, find a specific tag, append a child to that tag, append another child to the newly created tag and add text to the latter child.

我的 XML:

<root>
<a>
    <b>
      <c>text1</c>
    </b>
    <b>
      <c>text2</c>
   </b>
</a>
</root>    

所需的 XML:

<root>
<a>
    <b>
      <c>text1</c>
    </b>
    <b>
      <c>text2</c>
   </b>
    <b>
      <c>text3</c>
   </b>
</a>
</root>

當(dāng)前代碼:

import xml.etree.ElementTree as ET
tree = ET.parse('test.xml')
root = tree.getroot()


for x in root.iter():
    if (x.tag == 'a'):
        ET.SubElement(x, 'b')
        ET.SubElement(x, 'c')
        #add text

這似乎有效，除了 'c' 附加為 'a' 而不是 'b' 的子級(jí)

This seems to work except 'c' appends as a child of 'a' rather then 'b'

像這樣:

<root>
<a>
    <b>
      <c>test1</c>
    </b>
    <b>
      <c>test2</c>
    </b>
  <b /><c/></a>
</root>

另外，如何向新創(chuàng)建的元素c"添加文本?我可以遍歷，直到找到?jīng)]有文本但必須有更好的方法的標(biāo)簽c".

Also, how do I add text to the newly created element 'c'? I could iterate through until I find the a tag 'c' that has no text but there must be a better way.

推薦答案

需要指定b作為c的父元素.

You need to specify b as a parent element for c.

此外，為了獲取 a 標(biāo)記，您不需要循環(huán) - 只需獲取根 (a).

Also, for getting the a tag you don't need a loop - just take the root (a).

import xml.etree.ElementTree as ET

tree = ET.parse('test.xml')
root = tree.getroot()

a = root.find('a')
b = ET.SubElement(a, 'b')
c = ET.SubElement(b, 'c')
c.text = 'text3'

print ET.tostring(root)

打印:

<root>
    <a>
        <b>
          <c>text1</c>
        </b>
        <b>
          <c>text2</c>
        </b>
        <b>
          <c>text3</c>
        </b>
    </a>
</root>

這篇關(guān)于python xml.etree.ElementTree 附加到子元素的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！