def load_data(data_dir, with_components=True):
users = Users.parse_stream(open(os.path.join(data_dir, 'users.dat')))
movies = Movies.parse_stream(open(os.path.join(data_dir, 'movies.dat')))
ratings = Ratings.parse_stream(open(os.path.join(data_dir, 'ratings.dat')))
w = Workspace(movies, ratings, users)
w.summarize_users()
w.summarize_movies()
if with_components:
w.extract_components()
return users, movies, ratings
