how to xml add a new element to a new line

Question

Executing the code:

parser = ET.XMLParser(strip_cdata=False, )
tree = ET.parse(f'copy_{xml_file}', parser)
root[0].insert(0, ET.Element("type"))
root.write("test.xml", pretty_print=True)

And the element I added creates not on a new line but in front of another element, it turns out the form:

    <firstTeg>327</firstTeg>
    <secondTeg>1.0</secondTeg><type/>

I need to get this kind of:

    <firstTeg>327</firstTeg>
    <secondTeg>1.0</secondTeg>
    <type/>

How do I create a new tag on a new line?

@balderman unfortunately, this matters to the person working further with this xml) — Fedor March, Aug 02 '22 at 20:15
@Parolla Until you pointed it out, I didn't even know. It really works. Could you please write this below as an answer, I will answer it as a solution to my question, for future seekers — Fedor March, Aug 02 '22 at 20:22
This is about "pretty-printing". There are many existing questions and answers about it already. For example https://stackoverflow.com/q/749796/407651 — mzjn, Aug 02 '22 at 20:26
@mzjn You are right, but, for example, the key `pretty_print=True` in the `tree.write` method did not help me. `xml.dom.minidom' - it is necessary to additionally import and configure, I have also met `remove_blank_text = True` advised, but there is no token. And according to the method proposed above - just one added line solves this problem — Fedor March, Aug 02 '22 at 20:32

Fedor March · Answer 1 · 2022-08-02T20:19:46.393

1

parser = ET.XMLParser(strip_cdata=False, )
tree = ET.parse(f'copy_{xml_file}', parser)
new_elem = ET.Element("type")
new_elem.tail ="\n    "
root[0].insert(0, new_elem)
root.write("test.xml", pretty_print=True)

output:

<firstTeg>327</firstTeg>
<secondTeg>1.0</secondTeg>
<type/>

edited Aug 02 '22 at 20:19

answered Aug 02 '22 at 20:14

Fedor March

67
8

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Aug 04 '22 at 15:54

score 1 · Accepted Answer · answered Aug 02 '22 at 20:25

1

Add

ET.indent(tree, '  ')

line before

root.write("test.xml", pretty_print=True)

Note: Feature available from Python 3.9

answered Aug 02 '22 at 20:25

Parolla

408
2
6

The question is about lxml. `indent()` was added in lxml 4.5: https://lxml.de/4.5/changes-4.5.0.html. – mzjn Aug 03 '22 at 06:10

how to xml add a new element to a new line

2 Answers2