human
Solve the following python programming problem given the following code:
def main() : 
    global config 
    parser = argparse.ArgumentParser (description = 'Livestreamer curses frontend.') 
    try : 
        arg_type = unicode 
except : 
        arg_type = str 
parser.add_argument ('-d', type = arg_type, metavar = 'database', help = ('default: ' + config.DB_DEFAULT_PATH), default = os.path.join (config.DB_DEFAULT_PATH)) 
    parser.add_argument ('-f', type = arg_type, metavar = 'configfile', help = ('default: ' + config.RC_DEFAULT_PATH), default = os.path.join (config.RC_DEFAULT_PATH)) 
    parser.add_argument ('-p', action = 'store', type = arg_type, metavar = 'JSON file', help = 'load (overwrite) database with data from this file. Use - for stdin') 
    parser.add_argument ('-l', action = 'store_true', help = 'print the list of streams and exit') 
    args = parser.parse_args () 
    rc_filename = config.f 
    if os.path.exists (rc_filename) : 
        try : 
            config = imp.load_source (config.__name__, rc_filename) 
except Exception as e : 
            sys.stderr.write ('Failed to read rc file, error was:
{0}
'.format (str (e))) 
            sys.exit (1) 
init_stream_list = [] 
    if args.p : 
        if (args.p == '-') : 
            buf = sys.stdin 
else : 
            if os.path.exists (args.p) : 
                buf = open (args.p) 
else : 
                IOError ("No such file or directory: '{0}'".format (args.p)) 
init_stream_list = json.load (buf) 
        if (not isinstance (init_stream_list, list)) : 
            raise ValueError ('The stream list must be provided as a valid JSON array') 
keys = { 
            'name' : arg_type, 
            'url' : arg_type, 
            'res' : arg_type, 
} 
        def check_stream(s) : 
            for (k, t) in keys.items () : 
                try : 
                    if (not isinstance (s [k], t)) : 
                        return False 
except : 
                    return False 
return True 
init_stream_list = list (filter (check_stream, init_stream_list)) 
l = StreamList (args.d, config, list_streams =...

    
    

    Fix the buggy line: rc_filename = config.f
assistant
#Here is Python code to fix the buggy line: rc_filename = config.

rc_filename = args.f