import re

import xml.etree.ElementTree as ET

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

tree = ET.parse('test.xml')
root = tree.getroot()

xmlstr = ET.tostring(root, encoding='utf8', method='xml')




for elem in root.getiterator():
	#after you replace all with Dynamic Preset Data
	if "{{ DYNAMIC_PRESET_DATA" not in elem.text:
		print elem.text

	for key,value in elem.attrib.items():
		#print key


		if elem.attrib.get(key) != None:
	 		#print elem.attrib.get('Name'), elem.text
	 		elem.text = elem.text.replace(elem.text,"{{DYNAMIC_PRESET_DATA['descriptiveMetadata'][\'"+elem.attrib.get(key)+"\'"+"]}}")

	 		print "<"+elem.tag+ " " +key+"="+  "\""+ value + "\"" + ">" + elem.text + "</"+elem.tag+">"