mirror of
https://github.com/vale981/ray
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118 lines
3.7 KiB
Python
118 lines
3.7 KiB
Python
"""Example of using a custom RNN keras model."""
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import argparse
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import os
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import ray
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from ray import tune
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from ray.tune.registry import register_env
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from ray.rllib.examples.env.repeat_after_me_env import RepeatAfterMeEnv
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from ray.rllib.examples.env.repeat_initial_obs_env import RepeatInitialObsEnv
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from ray.rllib.examples.models.rnn_model import RNNModel, TorchRNNModel
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from ray.rllib.models import ModelCatalog
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from ray.rllib.utils.test_utils import check_learning_achieved
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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("--env", type=str, default="RepeatAfterMeEnv")
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parser.add_argument("--num-cpus", type=int, default=0)
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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=100, 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=90.0, help="Reward at which we stop training."
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)
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parser.add_argument(
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"--local-mode",
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action="store_true",
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help="Init Ray in local mode for easier debugging.",
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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(num_cpus=args.num_cpus or None, local_mode=args.local_mode)
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ModelCatalog.register_custom_model(
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"rnn", TorchRNNModel if args.framework == "torch" else RNNModel
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)
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register_env("RepeatAfterMeEnv", lambda c: RepeatAfterMeEnv(c))
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register_env("RepeatInitialObsEnv", lambda _: RepeatInitialObsEnv())
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config = {
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"env": args.env,
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"env_config": {
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"repeat_delay": 2,
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},
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"gamma": 0.9,
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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": 0,
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"num_envs_per_worker": 20,
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"entropy_coeff": 0.001,
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"num_sgd_iter": 5,
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"vf_loss_coeff": 1e-5,
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"model": {
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"custom_model": "rnn",
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"max_seq_len": 20,
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"custom_model_config": {
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"cell_size": 32,
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},
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},
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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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# To run the Algorithm without tune.run, using our RNN model and
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# manual state-in handling, do the following:
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# Example (use `config` from the above code):
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# >> import numpy as np
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# >> from ray.rllib.algorithms.ppo import PPO
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# >>
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# >> algo = PPO(config)
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# >> lstm_cell_size = config["model"]["custom_model_config"]["cell_size"]
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# >> env = RepeatAfterMeEnv({})
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# >> obs = env.reset()
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# >>
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# >> # range(2) b/c h- and c-states of the LSTM.
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# >> init_state = state = [
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# .. np.zeros([lstm_cell_size], np.float32) for _ in range(2)
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# .. ]
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# >>
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# >> while True:
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# >> a, state_out, _ = algo.compute_single_action(obs, state)
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# >> obs, reward, done, _ = env.step(a)
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# >> if done:
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# >> obs = env.reset()
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# >> state = init_state
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# >> else:
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# >> state = state_out
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results = tune.run(args.run, config=config, stop=stop, verbose=1)
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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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