Fix behavior cloning due to API changes (#1014)

baselines/gail/behavior_clone.py

@@ -23,7 +23,7 @@ from baselines.gail.dataset.mujoco_dset import Mujoco_Dset
 
 def argsparser():
     parser = argparse.ArgumentParser("Tensorflow Implementation of Behavior Cloning")
-    parser.add_argument('--env_id', help='environment ID', default='Hopper-v1')
+    parser.add_argument('--env_id', help='environment ID', default='Hopper-v2')
     parser.add_argument('--seed', help='RNG seed', type=int, default=0)
     parser.add_argument('--expert_path', type=str, default='data/deterministic.trpo.Hopper.0.00.npz')
     parser.add_argument('--checkpoint_dir', help='the directory to save model', default='checkpoint')
@@ -73,7 +73,7 @@ def learn(env, policy_func, dataset, optim_batch_size=128, max_iters=1e4,
         savedir_fname = tempfile.TemporaryDirectory().name
     else:
         savedir_fname = osp.join(ckpt_dir, task_name)
-    U.save_state(savedir_fname, var_list=pi.get_variables())
+    U.save_variables(savedir_fname, variables=pi.get_variables())
     return savedir_fname
 
 

baselines/gail/run_mujoco.py

@@ -165,7 +165,7 @@ def runner(env, policy_func, load_model_path, timesteps_per_batch, number_trajs,
     U.initialize()
     # Prepare for rollouts
     # ----------------------------------------
-    U.load_state(load_model_path)
+    U.load_variables(load_model_path)
 
     obs_list = []
     acs_list = []