Someone

import sysfrom genshi.template import MarkupTemplate, Contextclass Indexable(object):  def __str__(self):    return "foo"    def __getitem__(self, key):    print key    return None  #def __iter__(self): return Nonecontext = { 'contextbomb': Indexable() }text = """<div xmlns="http://www.w3.org/1999/xhtml"  xmlns:py="http://genshi.edgewall.org/">  ${contextbomb}</div>"""print texttmpl = MarkupTemplate(text)stream = tmpl.generate(**context)print stream.render('xhtml')