loadMovieLens集体智慧编程第二章recommendations遇到错误

[JustDeath]

def loadMovieLens(path='E://python/movielens'):
  # Get movie titles
  movies = {}
  for line in open(path + '/u.item'):
    (id, title) = line.split('|')[0:2]
    movies[id] = title

  # Load data
  prefs = {}
  for line in open(path + '/u.data'):
    (user, movieid, rating, ts) = line.split('\t')
    prefs.setdefault(user, {})
    prefs[user][movies[id]] = float(rating)
  return prefs