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():\n'
 print xml
 print

 doc = minidom.parseString(xml).documentElement

 comment = doc.lastChild.previousSibling

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

 uncomment_node(comment)

 print 'uncomment_node():\n'
 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>