CODEWITHSUNDEEP
pythonxmlparsingxml-parsinglxml
speedyrazor
speedyrazor

Reputation: 3215

XML Declaration standalone="yes" lxml

I have an xml I am parsing, making some changes and saving out to a new file. It has the declaration <?xml version="1.0" encoding="utf-8" standalone="yes"?> which I would like to keep. When I am saving out my new file I am loosing the standalone="yes" bit. How can I keep it in? Here is my code:

templateXml = """<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<package>
  <provider>Some Data</provider>
  <studio_display_name>Some Other Data</studio_display_name>
</package>"""

from lxml import etree
tree = etree.fromstring(templateXml)

xmlFileOut = '/Users/User1/Desktop/Python/Done.xml'   

with open(xmlFileOut, "w") as f:
    f.write(etree.tostring(tree, pretty_print = True, xml_declaration = True, encoding='UTF-8'))

Upvotes: 19

Views: 23296

Answers (5)

alecxe
alecxe

Reputation: 473873

You can pass standalone keyword argument to tostring():

etree.tostring(tree, pretty_print = True, xml_declaration = True, encoding='UTF-8', standalone=True)

Upvotes: 25

lechup
lechup

Reputation: 3150

If You want to disable outputting standalone at all pass None instead of True or False. Sounds logical but took some time to actually find and test it.

etree.tostring(tree, xml_declaration = True, encoding='utf-8', standalone=None)

or using context manager and stream etree.xmlfile serialization:

with etree.xmlfile(open('/tmp/test.xml'), encoding='utf-8') as xf:
    xf.write_declaration(standalone=None)
    with xf.element('html'):
        with xf.element('body'):
            element = etree.Element('p')
            element.text = 'This is paragraph'
            xf.write(element)

Upvotes: 0

Rob
Rob

Reputation: 1909

etree.tostring(tree, pretty_print = True, xml_declaration = True, encoding='UTF-8')

Will add the declaration if you're using lxml, however I noticed their declaration uses semi-quotes instead of full quotes.

You can also get the exact declaration you want by just concatenating the output with a static string you need:

xml = etree.tostring(tree, pretty_print = True, encoding='UTF-8')
xml = '<?xml version=\"1.0\" encoding=\"utf-8\"?>\n' + xml

Upvotes: 0

Luis Angel Fernandez
Luis Angel Fernandez

Reputation: 41

If you want to show the standalone='no' argument in your XML header, you have to set it to False instead of 'no'. Just like this:

etree.tostring(tree, pretty_print = True, xml_declaration = True, encoding='UTF-8', standalone=False)

If not, standalone will be set to 'yes' by default.

Upvotes: 4

falsetru
falsetru

Reputation: 369094

Specify standalone using tree.docinfo.standalone.

Try following:

from lxml import etree
tree = etree.fromstring(templateXml).getroottree() # NOTE: .getroottree()

xmlFileOut = '/Users/User1/Desktop/Python/Done.xml'   

with open(xmlFileOut, "w") as f:
    f.write(etree.tostring(tree, pretty_print=True, xml_declaration=True,
                           encoding=tree.docinfo.encoding,
                           standalone=tree.docinfo.standalone))

Upvotes: 13

Related Questions