lxml create CDATA element

Question

I am trying to create CDATA element as per https://lxml.de/apidoc/lxml.etree.html#lxml.etree.CDATA

The simplified version of my code looks like this:

description = ET.SubElement(item, "description")
description.text = CDATA('test')

But when I later try to convert it to string:

xml_str = ET.tostring(self.__root, xml_declaration=True).decode()

I get an exception

cannot serialize <lxml.etree.CDATA object at 0x122c30ef0> (type CDATA)

Could you advise me what am I missing?

Here is a simple example:

import xml.etree.cElementTree as ET
from lxml.etree import CDATA


root = ET.Element('rss')
root.set("version", "2.0")
description = ET.SubElement(root, "description")
description.text = CDATA('test')
xml_str = ET.tostring(root, xml_declaration=True).decode()
print(xml_str)

Cannot reproduce. Please provide a minimal reproducible example. — mzjn
– mzjn, Commented Jul 8, 2022 at 14:57

Charles Duffy · Accepted Answer · 2022-07-08 20:28:39Z

2

lxml.etree and xml.etree are two different libraries; you should pick one and stick with it, rather than using both and trying to pass objects created by one to the other.

A working example, using lxml only:

import lxml.etree as ET
from lxml.etree import CDATA

root = ET.Element('rss')
root.set("version", "2.0")
description = ET.SubElement(root, "description")
description.text = CDATA('test')
xml_str = ET.tostring(root, xml_declaration=True).decode()
print(xml_str)

You can run this yourself at https://replit.com/@CharlesDuffy2/JovialMediumLeadership

answered Jul 8, 2022 at 20:28

Charles Duffy

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