human
Solve the following python programming problem given the following code:
def configure_debug(self) : 
    'Configures guestfs to be verbose.' 
    if (not events.handle) : 
        LOG.warning (_LW ('Please consider to execute setup before trying to configure debug log message.')) 
else : 
        def log_callback(ev, eh, buf, array) : 
            if (ev == guestfs.EVENT_APPLIANCE) : 
                buf = buf.rstrip () 
LOG.debug ("event=%(event)s eh=%(eh)d buf='%(buf)s' array=%(array)s", { 
                'event' : guestfs.event_to_string (ev), 
                'eh' : eh, 
                'buf' : buf, 
                'array' : array, 
}) 
events = (((guestfs.EVENT_APPLIANCE | guestfs.EVENT_LIBRARY) | guestfs.EVENT_WARNING) | guestfs.EVENT_TRACE) 
        self.handle.set_trace (True) 
        self.handle.set_verbose (True) 
        self.handle.set_event_callback (log_callback, events) 

    
    

    Fix the buggy line: if (not events.handle) :
assistant
#Here is Python code to fix the buggy line: if (not events.

if (not self.handle) :