the bytes file will besaved under the name of the environment, not its path

python/ppo.py

     if steps != 0 and train_model:
         save_model(sess, model_path=model_path, steps=steps, saver=saver)
 env.close()
-export_graph(model_path, env_name)
+graph_name = (env_name.strip()
+      .replace('.app', '').replace('.exe', '').replace('.x86_64', '').replace('.x86', ''))
+graph_name = os.path.basename(os.path.normpath(graph_name))
+export_graph(model_path, graph_name)