code: def save(self, filething=None, padding=None):
          
  
          try:
              self.tags._inject(filething.fileobj, padding)
          except (IOError, error) as e:
              reraise(self._Error, e, sys.exc_info()[2])
          except EOFError:
              raise self._Error("no appropriate stream found")
docs: save(filething=None, padding=None)
  
          Save a tag to a file.
  
          If no filename is given, the one most recently loaded is used.
  
          Args:
              filething (filething)
              padding (:obj:`mutagen.PaddingFunction`)
          Raises:
              mutagen.MutagenError