Exporta table to XLM

Hello everyone, someone can help me to know, how I can print dataset from table to XML format?

XML is pretty wide open, but a simple XML output:

import xml.etree.ElementTree as ET

dataIn = system.dataset.toPyDataSet(event.source.parent.getComponent('Power Table').data)

headers = list(dataIn.getUnderlyingDataset().getColumnNames())

tree = ET.Element('dataset')
comment = ET.Comment('Dataset to XML Test') 

for row in dataIn:
	rowElement = ET.SubElement(tree, 'row')
	for col in headers:
		colElement = ET.SubElement(rowElement, col)
		colElement.text = str(row[col])

xmlString = ET.tostring(tree)

print xmlString