code: def _get_keyword(self, videoinfo):
          
          keyword = videoinfo.get('title')
          if videoinfo['season'] != 0:
              keyword += '.S{:02d}'.format(videoinfo['season'])
          if videoinfo['episode'] != 0:
              keyword += '.E{:02d}'.format(videoinfo['episode'])
          # replace space with '+'
          keyword = re.sub(r'\s+', '+', keyword)
          return keyword
docs: 获取关键词