human
Solve the following python programming problem given the following code:
def test_service_call_create_log_book_entry_no_message(self) : 
    'Test if service call create log book entry without message.' 
    calls = [] 
    def event_listener(event) : 
        calls.append (event) 
self.hass.bus.listen (logbook.EVENT_LOGBOOK_ENTRY, self) 
    self.hass.services.call (logbook.DOMAIN, 'log', { 
        
}, True) 
    self.hass.pool.block_till_done () 
    self.assertEqual (0, len (calls)) 

    
    

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

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