data = """<?xml version='1.0'?>
<methodCall>
<methodName>tt</methodName>
<params>
<param>
<value><string></string></value>
</param>
</params>
</methodCall>"""
p = xml.parsers.expat.ParserCreate()
p.Parse(data, True)
Недопустимый Unicode/XML с Python SimpleXMLRPCServer?