def use_tsig(self, keyring, keyname=None, fudge=300,
                 original_id=None, tsig_error=0, other_data='',
                 algorithm=dns.tsig.default_algorithm):
        """When sending, a TSIG signature using the specified keyring
        and keyname should be added.

        @param keyring: The TSIG keyring to use; defaults to None.
        @type keyring: dict
        @param keyname: The name of the TSIG key to use; defaults to None.
        The key must be defined in the keyring.  If a keyring is specified
        but a keyname is not, then the key used will be the first key in the
        keyring.  Note that the order of keys in a dictionary is not defined,
        so applications should supply a keyname when a keyring is used, unless
        they know the keyring contains only one key.
        @type keyname: dns.name.Name or string
        @param fudge: TSIG time fudge; default is 300 seconds.
        @type fudge: int
        @param original_id: TSIG original id; defaults to the message's id
        @type original_id: int
        @param tsig_error: TSIG error code; default is 0.
        @type tsig_error: int
        @param other_data: TSIG other data.
        @type other_data: string
        @param algorithm: The TSIG algorithm to use; defaults to
        dns.tsig.default_algorithm
        """

        self.keyring = keyring
        if keyname is None:
            self.keyname = self.keyring.keys()[0]
        else:
            if isinstance(keyname, (str, unicode)):
                keyname = dns.name.from_text(keyname)
            self.keyname = keyname
        self.keyalgorithm = algorithm
        self.fudge = fudge
        if original_id is None:
            self.original_id = self.id
        else:
            self.original_id = original_id
        self.tsig_error = tsig_error
        self.other_data = other_data
When sending, a TSIG signature using the specified keyring
        and keyname should be added.

        @param keyring: The TSIG keyring to use; defaults to None.
        @type keyring: dict
        @param keyname: The name of the TSIG key to use; defaults to None.
        The key must be defined in the keyring.  If a keyring is specified
        but a keyname is not, then the key used will be the first key in the
        keyring.  Note that the order of keys in a dictionary is not defined,
        so applications should supply a keyname when a keyring is used, unless
        they know the keyring contains only one key.
        @type keyname: dns.name.Name or string
        @param fudge: TSIG time fudge; default is 300 seconds.
        @type fudge: int
        @param original_id: TSIG original id; defaults to the message's id
        @type original_id: int
        @param tsig_error: TSIG error code; default is 0.
        @type tsig_error: int
        @param other_data: TSIG other data.
        @type other_data: string
        @param algorithm: The TSIG algorithm to use; defaults to
        dns.tsig.default_algorithm