I have a XML document "abc.xml":
I need to write a function replace(name, newvalue) which can replace the value node with tag 'name' with the new value and write it back to the disk. Is this possible in python? How should I do this?
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2 Answers
import xml.dom.minidom
filename='abc.xml'
doc = xml.dom.minidom.parse(filename)
print doc.toxml()
c = doc.getElementsByTagName("c")
print c[0].toxml()
c[0].childNodes[0].nodeValue = 'zip'
print doc.toxml()
def replace(tagname, newvalue):
'''doc is global, first occurrence of tagname gets it!'''
doc.getElementsByTagName(tagname)[0].childNodes[0].nodeValue = newvalue
replace('c', 'zit')
print doc.toxml()
See minidom primer and API Reference.
# cat abc.xml
<root>
<a>
<c>zap</c>
</a>
<b>
</b>
</root>
Comments
Sure it is possible. The xml.etree.ElementTree module will help you with parsing XML, finding tags and replacing values.
If you know a little bit more about the XML file you want to change, you can probably make the task a bit easier than if you need to write a generic function that will handle any XML file.
If you are already familiar with DOM parsing, there's a xml.dom package to use instead of the ElementTree one.
