human
Solve the following python programming problem given the following code:
@ mock.patch.object (vmops.VMOps, '_get_neutron_events') 
@ mock.patch.object (vmops.utils, 'is_neutron') 
def test_wait_vif_plug_events(self, mock_is_neutron, mock_get_events) : 
    self._vmops._virtapi.wait_for_instance_event.side_effect = etimeout.Timeout 
    self.flags (vif_plugging_timeout = 1) 
    self.flags (vif_plugging_is_fatal = True) 
    def _context_user() : 
        with self._vmops.wait_vif_plug_events (mock.sentinel.instance, mock.sentinel.network_info) : 
            pass 
self.assertRaises (exception.VirtualInterfaceCreateException, self) 
    mock_is_neutron.assert_called_once_with () 
    mock_get_events.assert_called_once_with (mock.sentinel.network_info) 
    self._vmops._virtapi.wait_for_instance_event.assert_called_once_with (mock.sentinel.instance, mock_get_events.return_value, deadline = CONF.vif_plugging_timeout, error_callback = self._vmops._neutron_failed_callback) 

    
    

    Fix the buggy line: self.assertRaises (exception.VirtualInterfaceCreateException, self)
assistant
#Here is Python program to fix the buggy line: self.

self.assertRaises (exception.VirtualInterfaceCreateException, def _context_user()