human
Solve the following python programming problem given the following code:
@ mock.patch ('nova.compute.claims.Claim') 
@ mock.patch ('nova.objects.Instance.save') 
def test_claim_saves_numa_topology(self, mock_save, mock_claim) : 
    def fake_save() : 
        self.assertEqual (set (['numa_topology', 'host', 'node', 'launched_on']), inst.obj_what_changed ()) 
mock_save.side_effect = fake_save 
    inst = objects.Instance (host = None, node = None, memory_mb = 1024) 
    inst.obj_reset_changes () 
    numa = objects.InstanceNUMATopology () 
    claim = mock.MagicMock () 
    claim.claimed_numa_topology = numa 
    mock_claim.return_value = claim 
    with mock.patch.object (self.tracker, '_update_usage_from_instance') : 
        self.tracker.instance_claim (inst.context, inst) 
mock_save.assert_called_once_with () 

    
    

    Fix the buggy line: self.tracker.instance_claim (inst.context, inst)
assistant
#Here is Python code to fix the buggy line: self.

self.tracker.instance_claim (self.context, inst)