#!/usr/local/bin/python2
from xml.etree.ElementTree import XMLParser

class B:
  def start():
    print 'start'
  def data():
    print 'data'
  def end():
    print 'end'
  def close():
    print 'close'

p = XMLParser(target=B)
p.feed('<a>1<b>2</b>3</a>')
p.close()