showing :(colon) error in xml element in python but i want that colon in the element

this is my sample.py

from xml.etree.ElementTree import Element, SubElement, Comment, tostring

top = Element('ernm:NewReleaseMessage',MessageSchemaVersionId='37', 
LanguageAndScriptCode='en',xs:schemaLocation='https://some' , 
xmlns:xs='http://www.instan', xmlns:ernm= 'http://37')

print(tostring(top))

i'm getting following errors....

File "sample.py", line 1
top =Element('ernm:NewReleaseMessage',MessageSchemaVersionId='ern/37',LanguageAndScriptCode='en',xs:schemaLocation='http://ddex.net/xml/ern/37 http://ddex.net/xml/ern/37/release-notification.xsd' , xmlns:xs='http://www.w3.org/2001/XMLSchema-instance', xmlns:ernm= 'http://ddex.net/xml/ern/37')
                                                                                                    ^SyntaxError: invalid syntax

How can i achive this.. please help me on this thanks in advance...