'Ensure binding None is handled correctly with dict bindings'

def test_none_values_dicts(self):

    prepared = self.session.prepare('\n                                                INSERT    INTO    test3rf.test    (k,    v)    VALUES        (?,    ?)\n                                                ')
    self.assertIsInstance(prepared, PreparedStatement)
    bound = prepared.bind({'k': 1, 'v': None})
    self.session.execute(bound)
    prepared = self.session.prepare('\n                                                SELECT    *    FROM    test3rf.test    WHERE    k=?\n                                                ')
    self.assertIsInstance(prepared, PreparedStatement)
    bound = prepared.bind({'k': 1})
    results = self.session.execute(bound)
    self.assertEqual(results[0].v, None)
