Traceback (most recent call last):
  File "/home/cc/cs61c/fa14/class/cs61c-ef/proj2/SlidingBfsSpark.py", line 93, in <module>
    main()
  File "/home/cc/cs61c/fa14/class/cs61c-ef/proj2/SlidingBfsSpark.py", line 86, in main
    solve_sliding_puzzle(args.master, writer, args.height, args.width)
  File "/home/cc/cs61c/fa14/class/cs61c-ef/proj2/SlidingBfsSpark.py", line 47, in solve_sliding_puzzle
    current_frontier = current_frontier.distinct(current_frontier.flatMap(lambda x: Sliding.children(WIDTH, HEIGHT, x[0]))).distinct().map(bfs_map)
TypeError: distinct() takes exactly 1 argument (2 given)
Command exited with non-zero status 1
5.70user 0.40system 0:04.53elapsed 134%CPU (0avgtext+0avgdata 840624maxresident)k
0inputs+120outputs (0major+90973minor)pagefaults 0swaps
gmake: *** [run-small] Error 1