def getOperationName(self, ps, action):
method = self.root.get(_get_element_nsuri_name(ps.body_root)) orself.soapAction.get(action)<EOL>if method is None:<EOL><INDENT>raise UnknownRequestException('<STR_LIT>' % (<EOL>action, _get_element_nsuri_name(ps.body_root)))<EOL><DEDENT>return method<EOL>
Returns operation name.
           action -- soapAction value