def get_all_genres(repo: AbstractRepository):
genres = []
for genre in repo.get_genres():
genres.append(genre)
if genres is []:
raise NonExistentGenreException
return sorted(genres)
def get_genre_names(repo:AbstractRepository) -> List[str]:
genres = repo.get_genres()
genre_names = [genre.genre_name for genre in genres]
return genre_names