How to update/modify an XML file in python?

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I have an XML document that I would like to update after it already contains data.

I thought about opening the XML file in "a" (append) mode. The problem is that the new data will be written after the root closing tag.

How can I delete the last line of a file, then start writing data from that point, and then close the root tag?

Of course I could read the whole file and do some string manipulations, but I don't think that's the best idea..

io xml python
9 Answers

For the modification, you could use tag.text from xml. Here is snippet:

import xml.etree.ElementTree as ET

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

for rank in root.iter('rank'):
    new_rank = int(rank.text) + 1
    rank.text = str(new_rank)
    
tree.write('output.xml')

The rank in the code is example of tag, which depending on your XML file contents.

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