69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
# %%
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import pathlib
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import pickle
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import tempfile
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import stable_baselines3 as sb3
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from stable_baselines3.common.env_util import make_vec_env
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from imitation.algorithms import adversarial, bc
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from imitation.data import rollout
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from imitation.util import logger
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from intersim.envs.intersimple import IntersimpleReward
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from gail.discriminator import MlpDiscriminator
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model_name = 'gail_flat'
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# %%
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# Load pickled test demonstrations.
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with open("data/NormalizedIntersimpleExpert_IntersimpleRewardAgent51.pkl", "rb") as f:
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# This is a list of `imitation.data.types.Trajectory`, where
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# every instance contains observations and actions for a single expert
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# demonstration.
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trajectories = pickle.load(f)
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# %%
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# Convert List[types.Trajectory] to an instance of `imitation.data.types.Transitions`.
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# This is a more general dataclass containing unordered
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# (observation, actions, next_observation) transitions.
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transitions = rollout.flatten_trajectories(trajectories)
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venv = make_vec_env(IntersimpleReward, n_envs=2, env_kwargs={'agent': 51})
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tempdir = tempfile.TemporaryDirectory(prefix="quickstart")
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tempdir_path = pathlib.Path(tempdir.name)
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print(f"All Tensorboards and logging are being written inside {tempdir_path}/.")
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# Train GAIL on expert data.
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# GAIL, and AIRL also accept as `expert_data` any Pytorch-style DataLoader that
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# iterates over dictionaries containing observations, actions, and next_observations.
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logger.configure(tempdir_path / "GAIL/")
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gail_trainer = adversarial.GAIL(
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venv,
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expert_data=transitions,
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expert_batch_size=150,
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n_disc_updates_per_round=32,
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discrim_kwargs={'discrim_net': MlpDiscriminator()},
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gen_algo=sb3.PPO("MlpPolicy", venv, verbose=1, n_steps=4530),
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)
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gail_trainer.train(total_timesteps=400000)
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gail_trainer.gen_algo.save(model_name)
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#del gail_trainer
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# %%
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model = sb3.PPO.load(model_name)
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env = IntersimpleReward(agent=51)
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obs = env.reset()
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while True:
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action, _states = model.predict(obs)
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obs, rewards, done, info = env.step(action)
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env.render(mode='post')
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if done:
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break
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env.close(filestr='render/'+model_name) |