How to use the sasl.sasl.saslmech.__init__ function in sasl

def __init__( self, asasl, plainname ):
		sasl.saslmech.__init__( self, asasl, plainname, 1 )
		if self.sasl.tls_active() is None:
			if not self.sasl.secquery( self, "I need to use plaintext authentication,\nbut I have no encryption layer. This is bad, as it is easy\nto obtain your password, and impossible to prevent.\nDo you REALLY want me to continue?" ):
				raise cancelled( self.sasl, self )
		else:
			if not self.sasl.secquery( self, "I have encryption, but I need to use\nplaintext authentication. If the server has been hacked,\nI will give the attacker your password.\nThis is unlikely, but should I continue?" ):
				raise cancelled( self.sasl, self )
		self.check_vals( ['username','password'] )

def __init__( self, asasl, mechname ):
		sasl.saslmech.__init__( self, asasl, mechname, 3 )
		self.hashfn = hash(mechname[7:])
		if self.hashfn is None:
			raise cancelled(self.sasl, self)
		if self.sasl.tls_active() is None:
			if not self.sasl.secquery( self, "I have no encryption, however I am using DIGEST-MD5.\nAn attacker listening to the wire could see what you're doing,\nbut would find it difficult to get your password.\nShould I continue?" ):
				raise cancelled( self.sasl, self )
		self._rspauth_okay = False
		self._digest_uri = None
		self._a1 = None
		self._encbuf = ''
		self._enc_key = None
		self._enc_seq = 0
		self._max_buffer = 65536
		self._decbuf = ''
		self._dec_key = None
		self._dec_seq = 0

def __init__( self, asasl, mechname ):
			sasl.saslmech.__init__( self, asasl, mechname, 2 )
			self.hash = hash(mechname[5:])
			if self.hash is None:
				raise cancelled( self.sasl, self )
			if self.sasl.tls_active() is None:
				if not self.sasl.secquery( self, "CRAM-MD5 is not very strong, and can be broken.\nShould I continue anyway? It is fairly safe to do so." ):
					raise cancelled( self.sasl, self )