code: def save(self, filething=None, v1=1, v2_version=4, v23_sep='/',
               padding=None):
          
  
          f = filething.fileobj
  
          try:
              header = ID3Header(filething.fileobj)
          except ID3NoHeaderError:
              old_size = 0
          else:
              old_size = header.size
  
          data = self._prepare_data(
              f, 0, old_size, v2_version, v23_sep, padding)
          new_size = len(data)
  
          if (old_size < new_size):
              insert_bytes(f, new_size - old_size, old_size)
          elif (old_size > new_size):
              delete_bytes(f, old_size - new_size, new_size)
          f.seek(0)
          f.write(data)
  
          self.__save_v1(f, v1)
docs: save(filething=None, v1=1, v2_version=4, v23_sep='/', padding=None)
  
          Save changes to a file.
  
          Args:
              filething (filething):
                  Filename to save the tag to. If no filename is given,
                  the one most recently loaded is used.
              v1 (ID3v1SaveOptions):
                  if 0, ID3v1 tags will be removed.
                  if 1, ID3v1 tags will be updated but not added.
                  if 2, ID3v1 tags will be created and/or updated
              v2 (int):
                  version of ID3v2 tags (3 or 4).
              v23_sep (text):
                  the separator used to join multiple text values
                  if v2_version == 3. Defaults to '/' but if it's None
                  will be the ID3v2v2.4 null separator.
              padding (:obj:`mutagen.PaddingFunction`)
  
          Raises:
              mutagen.MutagenError
  
          By default Mutagen saves ID3v2.4 tags. If you want to save ID3v2.3
          tags, you must call method update_to_v23 before saving the file.
  
          The lack of a way to update only an ID3v1 tag is intentional.