delete from pattern to pattern if it contains match

[Peter Otten]

harirammanohar at gmail.com wrote:

>> tree.write('output.xml')
> 
> yup its working well if i include register namespace, else i am getting
> ns:0  in every line of output.xml.
> 
> But its removing top line
> <?xml version="1.0" encoding="ISO-8859-1"?>

The write() method allows you to specify an encoding and/or require an xml 
declaration:

https://docs.python.org/dev/library/xml.etree.elementtree.html#xml.etree.ElementTree.ElementTree.write