human
Solve the following python programming problem given the following code:
def _real_extract(self, url) : 
    query = compat_urlparse.urlparse (url).query 
    query_dic = compat_urlparse.parse_qs (query) 
    video_id = query_dic ['publishedid'] [0] 
    url = self._build_url (query) 
    flashconfiguration = self._download_xml (url, video_id, 'Downloading flash configuration') 
    file_url = flashconfiguration.find ('file').text 
    file_url = file_url.replace ('/playlist.aspx', '/mrssplaylist.aspx') 
    file_url = re.sub ('(?<=\\?)(.+)$', (lambda m : self._clean_query (m.group ())), file_url) 
    info = self._download_xml (width, video_id, 'Downloading video info') 
    item = info.find ('channel/item') 
    def _bp(p) : 
        return xpath_with_ns (p, { 
            'media' : 'http://search.yahoo.com/mrss/', 
            'jwplayer' : 'http://developer.longtailvideo.com/trac/wiki/FlashFormats', 
}) 
formats = [] 
    for content in item.findall (_bp ('media:group/media:content')) : 
        attr = content.attrib 
        f_url = attr ['url'] 
        width = int (attr ['width']) 
        bitrate = int (attr ['bitrate']) 
        format_id = ('%d-%dk' % (width, bitrate)) 
        formats.append ({ 
            'format_id' : format_id, 
            'url' : f_url, 
            'width' : width, 
            'tbr' : bitrate, 
}) 
self._sort_formats (formats) 
    return { 
        'id' : video_id, 
        'title' : item.find ('title').text, 
        'formats' : formats, 
        'thumbnail' : item.find (_bp ('media:thumbnail')).attrib ['url'], 
        'description' : item.find ('description').text, 
        'duration' : int (attr ['duration']), 
} 

    
    

    Fix the buggy line: info = self._download_xml (width, video_id, 'Downloading video info')
assistant
#Here is Python code to find ('file').

info = self._download_xml (file_url, video_id, 'Downloading video info')