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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 explore_genres(self, parent_genre_id=None):
 		"""Get a listing of song genres. 		Parameters: 			parent_genre_id (str, Optional):
 A genre ID. 				If given, a listing of this genre's sub-genres is returned. 		Returns: 			list: Genre dicts. 		"""


		response = self._call(
			mc_calls.ExploreGenres,
			parent_genre_id
		)
		genre_list = response.body.get('genres', [])

		return genre_list