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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 songs_add(self, songs):
 		"""Add store songs to your library. 		Parameters: 			songs (list):
 A list of store song dicts. 		Returns: 			list: Songs' library IDs. 		"""


		mutations = [mc_calls.TrackBatch.add(song) for song in songs]
		response = self._call(
			mc_calls.TrackBatch,
			mutations
		)

		success_ids = [
			res['id']
			for res in response.body['mutate_response']
			if res['response_code'] == 'OK'
		]

		return success_ids