from xml.sax.saxutils import XMLGenerator
from xml.sax.xmlreader import AttributesNSImpl


def doit(stream): 
    x=XMLGenerator(stream,encoding="utf-8")

    x.startDocument()
    x.startPrefixMapping(u"test", u"http://example.org/test")
    x.startElementNS((u"http://example.org/test",u"tag"),u"tag",AttributesNSImpl({}, {}))
    x.characters("m\xc3\xb6\xc3\xb6se bite")
    x.endElementNS((u"http://example.org/test",u"tag"),u"tag")
    x.endDocument()

from StringIO import StringIO
from io import BytesIO
s=BytesIO()
#s=StringIO()
doit(s)

print s.buflist

print s.getvalue()