Setting 'xml:space' to 'preserve' Python lxml

问题

I have a text element within an SVG file that I'm generating using lxml. I want to preserve whitespace in this element. I create the text element and then attempt to .set() the xml:space to preserve but nothing I try seems to work. I'm probably missing something conceptually. Any ideas?

回答1:

You can do it by explicitly specifying the namespace URI associated with the special xml: prefix (see http://www.w3.org/XML/1998/namespace).

from lxml import etree

root = etree.Element("root")
root.set("{http://www.w3.org/XML/1998/namespace}space", "preserve")

print etree.tostring(root)

Output:

<root xml:space="preserve"/>    

来源：https://stackoverflow.com/questions/17476749/setting-xmlspace-to-preserve-python-lxml