Using "x:" in an XML element name-CodePudding

I'm trying to create an XML file that needs to be sent to a server, with this format:

<x:Envelope xmlns:x="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:sen2="http://www.some_url.com">
<x:Header>

I'm working with Python 3 and the lxml library, but when trying to create the element I get an error.

Test code:

def authSendDataExtraccion():
    envelope = etree.Element("x:Envelope")
    debug_XML(envelope)

Result:

ValueError: Invalid tag name 'x:Envelope'

How can I use the ":" character in the element and attribute names?

CodePudding user response：

Use an nsmap to create an element in a namespace:

envelope = etree.Element("Envelope", nsmap={'x': 'http://schemas.xmlsoap.org/soap/envelope/'})