def onChallenge(self, element):

        try:
            challenge = fromBase64(str(element))
        except SASLIncorrectEncodingError:
            self._deferred.errback()
        else:
            self.sendResponse(self.mechanism.getResponse(challenge))
XML string or `None`; representing the `error-info` element.
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/words/protocols/jabber/sasl.py/SASLInitiatingInitializer.onChallenge--crossover with--dataset/ETHPy150Open ncclient/ncclient/ncclient/operations/rpc.py/RPCError.info