from xml import sax
from xml.sax.saxutils import XMLGenerator
from StringIO import StringIO

testdoc = """
<?pi data?>
<a b='c'> 
   text 
</a>
"""
outfile = file("testout.xml", "wb")

parser = sax.make_parser()
parser.setContentHandler(XMLGenerator(outfile, "UTF-16"))
parser.parse(StringIO(testdoc))