human
Solve the following python programming problem given the following code:
def get_event(self, request, tag = '', callback = None, timeout = None) : 
    '
        Get an event (async of course) return a future that will get it later
        ' 
    if timeout_future._finished : 
        future = Future () 
        future.set_exception (TimeoutException ()) 
        return future 
future = Future () 
    if (callback is not None) : 
        def handle_future(future) : 
            tornado.ioloop.IOLoop.current ().add_callback (callback, future) 
future.add_done_callback (handle_future) 
self.tag_map [tag].append (future) 
    self.request_map [request].append ((tag, future)) 
    if timeout : 
        timeout_future = tornado.ioloop.IOLoop.current ().call_later (timeout, self._timeout_future, tag, future) 
        self.timeout_map [future] = timeout_future 
return future 

    
    

    Fix the buggy line: if timeout_future._finished :
assistant
#Here is Python code to fix the buggy line: if timeout_future.

if request._finished :