import pytest import numpy as np from mlagents.trainers.ghost.trainer import GhostTrainer from mlagents.trainers.ghost.controller import GhostController from mlagents.trainers.behavior_id_utils import BehaviorIdentifiers from mlagents.trainers.ppo.trainer import PPOTrainer from mlagents.trainers.agent_processor import AgentManagerQueue from mlagents.trainers.tests import mock_brain as mb from mlagents.trainers.tests.test_trajectory import make_fake_trajectory from mlagents.trainers.settings import TrainerSettings, SelfPlaySettings @pytest.fixture def dummy_config(): return TrainerSettings(self_play=SelfPlaySettings()) VECTOR_ACTION_SPACE = 1 VECTOR_OBS_SPACE = 8 DISCRETE_ACTION_SPACE = [3, 3, 3, 2] BUFFER_INIT_SAMPLES = 513 NUM_AGENTS = 12 @pytest.mark.parametrize("use_discrete", [True, False]) def test_load_and_set(dummy_config, use_discrete): mock_specs = mb.setup_test_behavior_specs( use_discrete, False, vector_action_space=DISCRETE_ACTION_SPACE if use_discrete else VECTOR_ACTION_SPACE, vector_obs_space=VECTOR_OBS_SPACE, ) trainer_params = dummy_config trainer = PPOTrainer("test", 0, trainer_params, True, False, 0, "0") trainer.seed = 1 policy = trainer.create_policy("test", mock_specs) trainer.seed = 20 # otherwise graphs are the same to_load_policy = trainer.create_policy("test", mock_specs) weights = policy.get_weights() load_weights = to_load_policy.get_weights() try: for w, lw in zip(weights, load_weights): np.testing.assert_array_equal(w, lw) except AssertionError: pass to_load_policy.load_weights(weights) load_weights = to_load_policy.get_weights() for w, lw in zip(weights, load_weights): np.testing.assert_array_equal(w, lw) def test_resume(dummy_config, tmp_path): mock_specs = mb.setup_test_behavior_specs( True, False, vector_action_space=[2], vector_obs_space=1 ) behavior_id_team0 = "test_brain?team=0" behavior_id_team1 = "test_brain?team=1" brain_name = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team0).brain_name tmp_path = tmp_path.as_posix() ppo_trainer = PPOTrainer(brain_name, 0, dummy_config, True, False, 0, tmp_path) controller = GhostController(100) trainer = GhostTrainer( ppo_trainer, brain_name, controller, 0, dummy_config, True, tmp_path ) parsed_behavior_id0 = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team0) policy = trainer.create_policy(parsed_behavior_id0, mock_specs) trainer.add_policy(parsed_behavior_id0, policy) parsed_behavior_id1 = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team1) policy = trainer.create_policy(parsed_behavior_id1, mock_specs) trainer.add_policy(parsed_behavior_id1, policy) trainer.save_model() # Make a new trainer, check that the policies are the same ppo_trainer2 = PPOTrainer(brain_name, 0, dummy_config, True, True, 0, tmp_path) trainer2 = GhostTrainer( ppo_trainer2, brain_name, controller, 0, dummy_config, True, tmp_path ) policy = trainer2.create_policy(parsed_behavior_id0, mock_specs) trainer2.add_policy(parsed_behavior_id0, policy) policy = trainer2.create_policy(parsed_behavior_id1, mock_specs) trainer2.add_policy(parsed_behavior_id1, policy) trainer1_policy = trainer.get_policy(parsed_behavior_id1.behavior_id) trainer2_policy = trainer2.get_policy(parsed_behavior_id1.behavior_id) weights = trainer1_policy.get_weights() weights2 = trainer2_policy.get_weights() for w, lw in zip(weights, weights2): np.testing.assert_array_equal(w, lw) def test_process_trajectory(dummy_config): mock_specs = mb.setup_test_behavior_specs( True, False, vector_action_space=[2], vector_obs_space=1 ) behavior_id_team0 = "test_brain?team=0" behavior_id_team1 = "test_brain?team=1" brain_name = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team0).brain_name ppo_trainer = PPOTrainer(brain_name, 0, dummy_config, True, False, 0, "0") controller = GhostController(100) trainer = GhostTrainer( ppo_trainer, brain_name, controller, 0, dummy_config, True, "0" ) # first policy encountered becomes policy trained by wrapped PPO parsed_behavior_id0 = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team0) policy = trainer.create_policy(parsed_behavior_id0, mock_specs) trainer.add_policy(parsed_behavior_id0, policy) trajectory_queue0 = AgentManagerQueue(behavior_id_team0) trainer.subscribe_trajectory_queue(trajectory_queue0) # Ghost trainer should ignore this queue because off policy parsed_behavior_id1 = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team1) policy = trainer.create_policy(parsed_behavior_id1, mock_specs) trainer.add_policy(parsed_behavior_id1, policy) trajectory_queue1 = AgentManagerQueue(behavior_id_team1) trainer.subscribe_trajectory_queue(trajectory_queue1) time_horizon = 15 trajectory = make_fake_trajectory( length=time_horizon, max_step_complete=True, observation_shapes=[(1,)], action_spec=mock_specs.action_spec, ) trajectory_queue0.put(trajectory) trainer.advance() # Check that trainer put trajectory in update buffer assert trainer.trainer.update_buffer.num_experiences == 15 trajectory_queue1.put(trajectory) trainer.advance() # Check that ghost trainer ignored off policy queue assert trainer.trainer.update_buffer.num_experiences == 15 # Check that it emptied the queue assert trajectory_queue1.empty() def test_publish_queue(dummy_config): mock_specs = mb.setup_test_behavior_specs( True, False, vector_action_space=[1], vector_obs_space=8 ) behavior_id_team0 = "test_brain?team=0" behavior_id_team1 = "test_brain?team=1" parsed_behavior_id0 = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team0) brain_name = parsed_behavior_id0.brain_name ppo_trainer = PPOTrainer(brain_name, 0, dummy_config, True, False, 0, "0") controller = GhostController(100) trainer = GhostTrainer( ppo_trainer, brain_name, controller, 0, dummy_config, True, "0" ) # First policy encountered becomes policy trained by wrapped PPO # This queue should remain empty after swap snapshot policy = trainer.create_policy(parsed_behavior_id0, mock_specs) trainer.add_policy(parsed_behavior_id0, policy) policy_queue0 = AgentManagerQueue(behavior_id_team0) trainer.publish_policy_queue(policy_queue0) # Ghost trainer should use this queue for ghost policy swap parsed_behavior_id1 = BehaviorIdentifiers.from_name_behavior_id(behavior_id_team1) policy = trainer.create_policy(parsed_behavior_id1, mock_specs) trainer.add_policy(parsed_behavior_id1, policy) policy_queue1 = AgentManagerQueue(behavior_id_team1) trainer.publish_policy_queue(policy_queue1) # check ghost trainer swap pushes to ghost queue and not trainer assert policy_queue0.empty() and policy_queue1.empty() trainer._swap_snapshots() assert policy_queue0.empty() and not policy_queue1.empty() # clear policy_queue1.get_nowait() mock_specs = mb.setup_test_behavior_specs( False, False, vector_action_space=VECTOR_ACTION_SPACE, vector_obs_space=VECTOR_OBS_SPACE, ) buffer = mb.simulate_rollout(BUFFER_INIT_SAMPLES, mock_specs) # Mock out reward signal eval buffer["extrinsic_rewards"] = buffer["environment_rewards"] buffer["extrinsic_returns"] = buffer["environment_rewards"] buffer["extrinsic_value_estimates"] = buffer["environment_rewards"] buffer["curiosity_rewards"] = buffer["environment_rewards"] buffer["curiosity_returns"] = buffer["environment_rewards"] buffer["curiosity_value_estimates"] = buffer["environment_rewards"] buffer["advantages"] = buffer["environment_rewards"] trainer.trainer.update_buffer = buffer # when ghost trainer advance and wrapped trainer buffers full # the wrapped trainer pushes updated policy to correct queue assert policy_queue0.empty() and policy_queue1.empty() trainer.advance() assert not policy_queue0.empty() and policy_queue1.empty() if __name__ == "__main__": pytest.main()