human
Solve the following python programming problem given the following code:
@ mock.patch ('oslo_utils.timeutils.is_older_than') 
@ mock.patch ('oslo_utils.timeutils.parse_strtime') 
def test_shelved_poll_filters_task_state(self, mock_parse, mock_older) : 
    self.flags (shelved_offload_time = 1) 
    mock_older.return_value = True 
    instance1 = self._create_fake_instance_obj () 
    instance1.task_state = task_states.SPAWNING 
    instance1.vm_state = vm_states.SHELVED 
    instance1.host = self.compute.host 
    instance1.system_metadata = { 
        'shelved_at' : '', 
} 
    instance1.save () 
    instance2 = self._create_fake_instance_obj () 
    instance2.task_state = None 
    instance2.vm_state = vm_states.SHELVED 
    instance2.host = self.compute.host 
    instance2.system_metadata = { 
        'shelved_at' : '', 
} 
    instance2.save () 
    data = [] 
    def fake_soi(context, instance, **kwargs) : 
        data.append (instance.uuid) 
with mock.patch.object (self.compute, 'shelve_offload_instance') as soi : 
        soi.side_effect = fake_soi 
        self.compute._poll_shelved_instances (self.context) 
        self.assertTrue (soi.called) 
        self.assertEqual ([instance2.uuid], self) 

    
    

    Fix the buggy line: self.assertEqual ([instance2.uuid], self)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual ([instance2.uuid], data)