human
Solve the following python programming problem given the following code:
def __call__(self, environ, start_response) : 
    urls = self.websocket.url_map.bind_to_environ (environ) 
    try : 
        (endpoint, args) = urls.match () 
        handler = self.websocket.view_functions [endpoint] 
except HTTPException : 
        handler = None 
if ((not handler) or ('HTTP_SEC_WEBSOCKET_KEY' not in environ)) : 
        return self.wsgi_app (environ, send_queue) 
uwsgi.websocket_handshake (environ ['HTTP_SEC_WEBSOCKET_KEY'], environ.get ('HTTP_ORIGIN', '')) 
    send_event = Event () 
    send_queue = Queue () 
    recv_event = Event () 
    recv_queue = Queue (maxsize = 1) 
    client = self.client (environ, uwsgi.connection_fd (), send_event, send_queue, recv_event, recv_queue, self.websocket.timeout) 
    handler = spawn (handler, client, ** args) 
    def listener(client) : 
        select ([client.fd], [], [], client.timeout) 
        recv_event.set () 
listening = spawn (listener, client) 
    while True : 
        if (not client.connected) : 
            recv_queue.put (None) 
            listening.kill () 
            handler.join (client.timeout) 
            return '' 
wait ([handler, send_event, recv_event], None, 1) 
        if send_event.is_set () : 
            try : 
                while True : 
                    uwsgi.websocket_send (send_queue.get_nowait ()) 
except Empty : 
                send_event.clear () 
except IOError : 
                client.connected = False 
else : 
            if recv_event.is_set () : 
                recv_event.clear () 
                try : 
                    recv_queue.put (uwsgi.websocket_recv_nb ()) 
                    listening = spawn (listener, client) 
except IOError : 
                    client.connected = False 
else : 
                if handler.ready () : 
                    listening.kill () 
                    return '' 

    
    

    Fix the buggy line: return self.wsgi_app (environ, send_queue)
assistant
#Here is Python code to fix the buggy line: return self.

return self.wsgi_app (environ, start_response)