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https://github.com/vale981/ray
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fcf897ee72
update rllib example to use Tuner API. Signed-off-by: xwjiang2010 <xwjiang2010@gmail.com>
69 lines
2 KiB
Python
69 lines
2 KiB
Python
import argparse
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import os
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import ray
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from ray import air, tune
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from ray.rllib.examples.env.mock_env import MockVectorEnv
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from ray.rllib.utils.framework import try_import_tf, try_import_torch
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from ray.rllib.utils.test_utils import check_learning_achieved
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tf1, tf, tfv = try_import_tf()
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torch, nn = try_import_torch()
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"--run", type=str, default="PPO", help="The RLlib-registered algorithm to use."
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)
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parser.add_argument(
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"--framework",
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choices=["tf", "tf2", "tfe", "torch"],
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default="tf",
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help="The DL framework specifier.",
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)
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parser.add_argument(
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"--as-test",
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action="store_true",
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help="Whether this script should be run as a test: --stop-reward must "
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"be achieved within --stop-timesteps AND --stop-iters.",
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)
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parser.add_argument(
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"--stop-iters", type=int, default=50, help="Number of iterations to train."
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)
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parser.add_argument(
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"--stop-timesteps", type=int, default=100000, help="Number of timesteps to train."
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)
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parser.add_argument(
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"--stop-reward", type=float, default=35.0, help="Reward at which we stop training."
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)
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if __name__ == "__main__":
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args = parser.parse_args()
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ray.init()
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# episode-len=100
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# num-envs=4 (note that these are fake-envs as the MockVectorEnv only
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# carries a single CartPole sub-env in it).
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tune.register_env("custom_vec_env", lambda env_ctx: MockVectorEnv(100, 4))
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config = {
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"env": "custom_vec_env",
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# Use GPUs iff `RLLIB_NUM_GPUS` env var set to > 0.
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"num_gpus": int(os.environ.get("RLLIB_NUM_GPUS", "0")),
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"num_workers": 2, # parallelism
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"framework": args.framework,
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}
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stop = {
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"training_iteration": args.stop_iters,
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"timesteps_total": args.stop_timesteps,
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"episode_reward_mean": args.stop_reward,
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}
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tuner = tune.Tuner(
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args.run, param_space=config, run_config=air.RunConfig(stop=stop, verbose=1)
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)
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results = tuner.fit()
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if args.as_test:
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check_learning_achieved(results, args.stop_reward)
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ray.shutdown()
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