human
Solve the following python programming problem given the following code:
def _fetch_and_save_item_refs(stream_ids, api, args, streams_directory, user_id) : 
    fetched_stream_ids = [0] 
    def report_item_refs_progress(stream_id, item_refs) : 
        if (item_refs is None) : 
            logging.error ('  Could not load item refs from %s', stream_id) 
            return 
fetched_stream_ids [0] += 1 
        logging.info ('  Loaded %s item refs from %s, %d streams left.', '{:,}'.format (len (item_refs)), stream_id, (len (stream_ids) - fetched_stream_ids [0])) 
item_refs_responses = base.worker.do_work ((lambda : FetchItemRefsWorker (api, args.stream_items_chunk_size, args.max_items_per_stream)), stream_ids, args.parallelism, report_progress = report_item_refs_progress) 
    if args.additional_item_refs_file_path : 
        _load_additional_item_refs (base.paths.normalize (args.additional_item_refs_file_path), stream_ids, item_refs_responses, i) 
logging.info ('Saving item refs for %d streams', len ([i for i in item_refs_responses if (i is not None)])) 
    item_ids = set () 
    item_refs_total = 0 
    for (stream_id, item_refs) in itertools.izip (stream_ids, item_refs_responses) : 
        if (not item_refs) : 
            continue 
item_ids.update ([item_ref.item_id for item_ref in item_refs]) 
        item_refs_total += len (item_refs) 
        if (stream_id == base.api.EXPLORE_STREAM_ID) : 
            base.api.not_found_items_ids_to_ignore.update ([i.item_id for i in item_refs]) 
stream = base.api.Stream (stream_id = stream_id, item_refs = item_refs) 
        stream_file_name = (base.paths.stream_id_to_file_name (stream_id) + '.json') 
        stream_file_path = os.path.join (streams_directory, stream_file_name) 
        with open (stream_file_path, 'w') as stream_file : 
            stream_file.write (json.dumps (stream.to_json ())) 
return (list (item_ids), item_refs_total) 

    
    

    Fix the buggy line: _load_additional_item_refs (base.paths.normalize (args.additional_item_refs_file_path), stream_ids, item_refs_responses, i)
assistant
#Here is Python program to fix the buggy line: _load_additional_item_refs (base.

_load_additional_item_refs (base.paths.normalize (args.additional_item_refs_file_path), stream_ids, item_refs_responses, user_id)