code: def download(self, paths, tool, language):
          
  
          if tool not in self.available:
              fatal('{!r} is not installed'.format(tool))
  
          try:
              from . import plugins
              downloader = plugins.__getattribute__(tool)
          except AttributeError:
              fatal('{!r} is not a supported download tool'.format(tool))
  
          try:
              if downloader.__code__.co_argcount is 2:
                  downloader(paths, language)
              elif downloader.__code__.co_argcount is 1:
                  downloader(paths)
          except:  # pylint: disable=bare-except
              if not check_connectivity():
                  error('Internet connectivity appears to be disabled')
              else:
                  error('{!r} experienced an unknown error'.format(tool))
docs: Download subtitles via a number of tools.