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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def playlists_iter(self, *, start_token=None, page_size=250):
 		"""Get a paged iterator of library playlists. 		Parameters: 			start_token (str):
 The token of the page to return. 				Default: Not sent to get first page. 			page_size (int, Optional):
 The maximum number of results per returned page. 				Max allowed is ``49995``. 				Default: ``250`` 		Yields: 			list: Playlist dicts. 		"""


		start_token = None

		while True:
			response = self._call(
				mc_calls.PlaylistFeed,
				max_results=page_size,
				start_token=start_token
			)
			items = response.body.get('data', {}).get('items', [])

			if items:
				yield items

			start_token = response.body.get('nextPageToken')
			if start_token is None:
				break