Commenting and uncommenting XML via Python

转载：

http://stackoverflow.com/questions/8764017/commenting-and-uncommenting-xml-via-python

from xml.dom import minidom

xml = """
<target depends="create-build-dir" name="build-Folio">
   <property name="project.name" value="Folio"/>
   <ant antfile="build.xml" dir="Folio/FolioUI" inheritall="false" target="package"/>
   <ant antfile="build.xml" dir="Folio/Folio" inheritall="false" target="package"/>
</target>
"""

def comment_node(node):
    comment = node.ownerDocument.createComment(node.toxml())
    node.parentNode.replaceChild(comment, node)
    return comment

def uncomment_node(comment):
    node = minidom.parseString(comment.data).firstChild
    comment.parentNode.replaceChild(node, comment)
    return node

doc = minidom.parseString(xml).documentElement

comment_node(doc.getElementsByTagName('ant')[-1])

xml = doc.toxml()

print 'comment_node():
'
print xml
print

doc = minidom.parseString(xml).documentElement

comment = doc.lastChild.previousSibling

print 're-parsed comment:
'
print comment.toxml()
print

uncomment_node(comment)

print 'uncomment_node():
'
print doc.toxml()
print

Output:

comment_node():<target depends="create-build-dir" name="build-Folio"><property name="project.name" value="Folio"/><ant antfile="build.xml" dir="Folio/FolioUI" inheritall="false" target="package"/><!--<ant antfile="build.xml" dir="Folio/Folio" inheritall="false" target="package"/>--></target>

re-parsed comment:<!--<ant antfile="build.xml" dir="Folio/Folio" inheritall="false" target="package"/>-->

uncomment_node():<target depends="create-build-dir" name="build-Folio"><property name="project.name" value="Folio"/><ant antfile="build.xml" dir="Folio/FolioUI" inheritall="false" target="package"/><ant antfile="build.xml" dir="Folio/Folio" inheritall="false" target="package"/></target>