def candidates(items, artist, album, va_likely):
 for plugin in find_plugins():
  for candidate in plugin.candidates(items, artist, album, va_likely):
   (yield candidate)

def candidates ( items , artist , album , va_likely ) : for plugin in find_plugins ( ) : for candidate in plugin . candidates ( items , artist , album , va_likely ) : ( yield candidate )
gets musicbrainz candidates for an album from each plugin .