def test_blobDSA(self):
        """
        Return the over-the-wire SSH format of the DSA public key.
        """
        publicNumbers = self.dsaObj.private_numbers().public_numbers

        self.assertEqual(
            keys.Key(self.dsaObj).blob(),
            common.NS(b'ssh-dss') +
            common.MP(publicNumbers.parameter_numbers.p) +
            common.MP(publicNumbers.parameter_numbers.q) +
            common.MP(publicNumbers.parameter_numbers.g) +
            common.MP(publicNumbers.y)
            )

        Return the over-the-wire SSH format of the DSA public key.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/test/test_keys.py