human
Solve the following python programming problem given the following code:
@ patch ('ncclient.transport.session.HelloHandler.parse') 
def test_hello_handler_callback_error(self, mock_parse) : 
    def ok_cb(id, capabilities) : 
        self._id = id 
        self._server_capabilities = capabilities 
def err_cb(err) : 
        self.error = 'Error' 
mock_parse.side_effect = Exception 
    listener = HelloHandler (ok_cb, err_cb) 
    listener.callback (parse_root (hello_rpc_reply), hello_rpc_reply) 
    self.assertEqual (mock_parse.error, 'Error') 

    
    

    Fix the buggy line: self.assertEqual (mock_parse.error, 'Error')
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (self.error, 'Error')