Fix alien syntax and apply PEP 8 style (#554)

baselines/run.py

@@ -1,5 +1,5 @@
 import sys
-import multiprocessing 
+import multiprocessing
 import os.path as osp
 import gym
 from collections import defaultdict
@@ -30,7 +30,7 @@ for env in gym.envs.registry.all():
 # reading benchmark names directly from retro requires
 # importing retro here, and for some reason that crashes tensorflow
 # in ubuntu
-_game_envs['retro'] = set([
+_game_envs['retro'] = {
     'BubbleBobble-Nes',
     'SuperMarioBros-Nes',
     'TwinBee3PokoPokoDaimaou-Nes',
@@ -39,7 +39,7 @@ _game_envs['retro'] = set([
     'Vectorman-Genesis',
     'FinalFight-Snes',
     'SpaceInvaders-Snes',
-])
+}
 
 
 def train(args, extra_args):
@@ -60,8 +60,6 @@ def train(args, extra_args):
         if alg_kwargs.get('network') is None:
             alg_kwargs['network'] = get_default_network(env_type)
 
-
-
     print('Training {} on {}:{} with arguments \n{}'.format(args.alg, env_type, env_id, alg_kwargs))
 
     model = learn(
@@ -91,7 +89,7 @@ def build_env(args):
         if args.num_env:
             env = make_vec_env(env_id, env_type, nenv, seed, reward_scale=args.reward_scale)
         else:
-            env = make_vec_env(env_id, env_type,    1, seed, reward_scale=args.reward_scale)
+            env = make_vec_env(env_id, env_type, 1, seed, reward_scale=args.reward_scale)
 
         env = VecNormalize(env)
 
@@ -117,7 +115,8 @@ def build_env(args):
     elif env_type == 'retro':
         import retro
         gamestate = args.gamestate or 'Level1-1'
-        env = retro_wrappers.make_retro(game=args.env, state=gamestate, max_episode_steps=10000, use_restricted_actions=retro.Actions.DISCRETE)
+        env = retro_wrappers.make_retro(game=args.env, state=gamestate, max_episode_steps=10000,
+                                        use_restricted_actions=retro.Actions.DISCRETE)
         env.seed(args.seed)
         env = bench.Monitor(env, logger.get_dir())
         env = retro_wrappers.wrap_deepmind_retro(env)
@@ -140,7 +139,7 @@ def build_env(args):
 def get_env_type(env_id):
     if env_id in _game_envs.keys():
         env_type = env_id
-        env_id =  [g for g in _game_envs[env_type]][0]
+        env_id = [g for g in _game_envs[env_type]][0]
     else:
         env_type = None
         for g, e in _game_envs.items():
@@ -151,6 +150,7 @@ def get_env_type(env_id):
 
     return env_type, env_id
 
+
 def get_default_network(env_type):
     if env_type == 'mujoco' or env_type == 'classic_control':
         return 'mlp'
@@ -159,6 +159,7 @@ def get_default_network(env_type):
 
     raise ValueError('Unknown env_type {}'.format(env_type))
 
+
 def get_alg_module(alg, submodule=None):
     submodule = submodule or alg
     try:
@@ -174,6 +175,7 @@ def get_alg_module(alg, submodule=None):
 def get_learn_function(alg):
     return get_alg_module(alg).learn
 
+
 def get_learn_function_defaults(alg, env_type):
     try:
         alg_defaults = get_alg_module(alg, 'defaults')
@@ -182,6 +184,7 @@ def get_learn_function_defaults(alg, env_type):
         kwargs = {}
     return kwargs
 
+
 def parse(v):
     '''
     convert value of a command-line arg to a python object if possible, othewise, keep as string
@@ -199,14 +202,13 @@ def main():
 
     arg_parser = common_arg_parser()
     args, unknown_args = arg_parser.parse_known_args()
-    extra_args = {k: parse(v) for k,v in parse_unknown_args(unknown_args).items()}
+    extra_args = {k: parse(v) for k, v in parse_unknown_args(unknown_args).items()}
-
 
     if MPI is None or MPI.COMM_WORLD.Get_rank() == 0:
         rank = 0
         logger.configure()
     else:
-        logger.configure(format_strs = [])
+        logger.configure(format_strs=[])
         rank = MPI.COMM_WORLD.Get_rank()
 
     model, _ = train(args, extra_args)
@@ -215,14 +217,13 @@ def main():
         save_path = osp.expanduser(args.save_path)
         model.save(save_path)
 
-
     if args.play:
         logger.log("Running trained model")
         env = build_env(args)
         obs = env.reset()
         while True:
             actions = model.step(obs)[0]
-            obs, _, done, _  = env.step(actions)
+            obs, _, done, _ = env.step(actions)
             env.render()
             done = done.any() if isinstance(done, np.ndarray) else done
 
@@ -230,6 +231,5 @@ def main():
                 obs = env.reset()
 
 
-
 if __name__ == '__main__':
     main()