XML : xml creation in python

I am able to create a xml file with below code but what I am after is this. Does anyone have a clue as to what change is needed in the code to achieve this?

  import xml.etree.cElementTree as ET  root = ET.Element("root")  ET.SubElement(root, "field1", name="blah").text = "some value1"  ET.SubElement(root, "field2", name="hi").text = "some value2"  ET.SubElement(root, "field3", name="asdfasd").text = "some vlaue3"  tree = ET.ElementTree(root)  tree.write("filename.xml")