async def add_items(self, *items):
items = [item.id for item in await self.process(items)]<EOL>if not items:<EOL><INDENT>return<EOL><DEDENT>await self.connector.post('<STR_LIT>'.format(Id=self.id),<EOL>data={'<STR_LIT>': '<STR_LIT:U+002C>'.join(items)}, remote=False<EOL>)<EOL>
append items to the playlist

        |coro|

        Parameters
        ----------
        items : array_like
          list of items to add(or their ids)

        See Also
        --------
          remove_items :