code: def save(self, filething=None, deleteid3=False, padding=None):
          
  
          self._save(filething, self.metadata_blocks, deleteid3, padding)
docs: Save metadata blocks to a file.
  
          Args:
              filething (filething)
              deleteid3 (bool): delete id3 tags while at it
              padding (:obj:`mutagen.PaddingFunction`)
  
          If no filename is given, the one most recently loaded is used.