Changing element value on existing XML file using python [duplicate]

Question

I'm really newbie in python. I need to write some string in existing xml file.

My XML strutcure is like this:

    <koza>
      <colors>
        <color name="one" **value="#00FF00"** />
        <color name="two" value="#a12345" />
        <color name="three" value="#c2c145" />
        <color name="four" value="#315a25" />
        ...
      </colors>
    </koza>

I only need to change value in one line, example, in first line change "#00FF00" to "#FFFFFF".

Is there a simple code to do this?

Thanks!

By the way, how exactly you define the "first line" matters. Do you identify it because it's the color named "one"? Because it's the color with the original value #00FF00? The first child of the <colors> element? Something else? — Charles Duffy
– Charles Duffy, Commented Feb 25, 2014 at 18:30

Charles Duffy · Accepted Answer · 2014-02-25 18:47:11Z

2

import lxml.etree

# input
doc = lxml.etree.parse('input_file.xml'))

# modification
for el in doc.xpath("//color[@name='one']"):
  el.attrib['value'] = '#FFFFFFFF'

# output
open('output_file.xml', 'w').write(lxml.etree.tostring(doc))

edited Feb 25, 2014 at 18:47

answered Feb 25, 2014 at 18:24

Charles Duffy

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1 Comment

dh81 Over a year ago

For me doc.write ('FILEPATH') (stackoverflow.com/questions/47439566/…) is shorter and working.

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