human
Solve the following python programming problem given the following code:
def test_service_call_create_logbook_entry(self) : 
    'Test if service call create log book entry.' 
    calls = [] 
    def event_listener(event) : 
        calls.append (event) 
self.hass.bus.listen (logbook.EVENT_LOGBOOK_ENTRY, last_call) 
    self.hass.services.call (logbook.DOMAIN, 'log', { 
        logbook.ATTR_NAME : 'Alarm', 
        logbook.ATTR_MESSAGE : 'is triggered', 
        logbook.ATTR_DOMAIN : 'switch', 
        logbook.ATTR_ENTITY_ID : 'switch.test_switch', 
}, True) 
    self.hass.pool.block_till_done () 
    self.assertEqual (1, len (calls)) 
    last_call = calls [(- 1)] 
    self.assertEqual ('Alarm', last_call.data.get (logbook.ATTR_NAME)) 
    self.assertEqual ('is triggered', last_call.data.get (logbook.ATTR_MESSAGE)) 
    self.assertEqual ('switch', last_call.data.get (logbook.ATTR_DOMAIN)) 
    self.assertEqual ('switch.test_switch', last_call.data.get (logbook.ATTR_ENTITY_ID)) 

    
    

    Fix the buggy line: self.hass.bus.listen (logbook.EVENT_LOGBOOK_ENTRY, last_call)
assistant
#Here is Python program to fix the buggy line: self.

self.hass.bus.listen (logbook.EVENT_LOGBOOK_ENTRY, def event_listener()