[DQN] Use ALE from atari_py

examples/DeepQNetwork/README.md

@@ -17,8 +17,9 @@ used a modified version where each batch contains transitions from different sim
 
 ## Usage:
 
+Install dependencies by `pip install 'gym[atari]'`.
+
 ### With ALE (paper's setting):
-Install [ALE](https://github.com/mgbellemare/Arcade-Learning-Environment) and `gym[atari]`.
 
 Download an [atari rom](https://github.com/openai/atari-py/tree/gdb/atari_py/atari_roms), e.g.:
 ```
@@ -53,9 +54,10 @@ Claimed performance in the paper can be reproduced, on several games I've tested
 ![DQN](curve-breakout.png)
 
 | Environment   | Avg Score | Download                                                                              |
-|:-------------|:---------:|:------------------------------------------------------------------------------------:|
+|:--------------|:---------:|:-------------------------------------------------------------------------------------:|
 | breakout.bin  | 465       | [:arrow_down:](http://models.tensorpack.com/DeepQNetwork/DoubleDQN-breakout.bin.npz)  |
 | seaquest.bin  | 8686      | [:arrow_down:](http://models.tensorpack.com/DeepQNetwork/DoubleDQN-seaquest.bin.npz)  |
+| ms_pacman.bin | 3323      | [:arrow_down:](http://models.tensorpack.com/DeepQNetwork/DoubleDQN-ms_pacman.bin.npz) |
 
 ## Speed
 On one GTX 1080Ti,

examples/DeepQNetwork/atari.py

@@ -8,7 +8,7 @@ import threading
 import cv2
 import gym
 import six
-from ale_python_interface import ALEInterface
+from atari_py.ale_python_interface import ALEInterface
 from gym import spaces
 from gym.envs.atari.atari_env import ACTION_MEANING
 from six.moves import range