def test_getMP(self):
        """
        L{common.getMP} should parse the a multiple precision integer from a
        string: a 4-byte length followed by length bytes of the integer.
        """
        self.assertEqual(
            self.getMP(b'\x00\x00\x00\x04\x00\x00\x00\x01'),
            (1, b''))

        L{common.getMP} should parse the a multiple precision integer from a
        string: a 4-byte length followed by length bytes of the integer.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/test/test_ssh.py