python xml.etree.ElementTree追加到子元素 [英] python xml.etree.ElementTree append to subelement
问题描述
我正在尝试使用xml.etree.ElementTree解析xml文件,查找特定标签,将一个子项附加到该标签,将另一个子项附加到新创建的标签并将文本添加到该子项。
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>
当前代码:
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
这似乎可以解决,但'c'除外追加为'a'而不是'b'的子项
This seems to work except 'c' appends as a child of 'a' rather then 'b'
就像这样:
<root>
<a>
<b>
<c>test1</c>
</b>
<b>
<c>test2</c>
</b>
<b /><c/></a>
</root>
此外,如何将文本添加到新创建的元素 c中?我可以迭代直到找到没有文本但必须有更好方法的标记'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.
推荐答案
您需要指定 b
作为 c
的父元素。
You need to specify b
as a parent element for c
.
此外,要获取 a
标记,您不需要循环-只需取根( 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)
次打印:
<root>
<a>
<b>
<c>text1</c>
</b>
<b>
<c>text2</c>
</b>
<b>
<c>text3</c>
</b>
</a>
</root>
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