def test_agent(fname, agent, avg=100, seed=43):
_, env_args = load_args(CONFIG_PATH)
if fname is not None:
# if map is specified, use the map without random map
env_args["fname"] = fname
env_args["random_map"] = False
env = gym.make("ScavengerHuntMap-v0", **env_args)
env.seed(seed)
dist_list = []
a = agent(env)
for i in range(avg):
print("Running %d/%d" % ((i + 1), avg), end="\r")
obs = env.reset()
done = False
dist = 0
while not done:
act = a.next_node(obs)
cl = env.env.map.get_current_loc()
obs, _, done, info = env.step(act)
dist += info["cost"]
dist_list.append(dist)
return sum(dist_list) / avg, np.std(dist_list)
print('observation space:', env.observation_space)
print('action space:', env.action_space)
env.render()
action = env.action_space.sample()
print(action)
obs, r, done, info = env.step(action)
print('next observation:', obs)
print('reward:', r)
print('done:', done)
print('info:', info)
print('nb_actions', env.action_space.n)
env = gym.make(ENV_NAME)
np.random.seed(123)
env.seed(123)
nb_actions = env.action_space.n
# Next, we build a very simple model.
model = Sequential()
model.add(Flatten(input_shape=(1, ) + env.observation_space.shape))
model.add(Dense(300))
model.add(Activation('relu'))
model.add(Dense(300))
model.add(Activation('relu'))
model.add(Dense(300))
model.add(Activation('relu'))
model.add(Dense(300))
model.add(Activation('relu'))
model.add(Dense(300))
model.add(Activation('relu'))
sys.path.append('./') # 此时假设此 py 文件和 env 文件夹在同一目录下
import env
parser = argparse.ArgumentParser(
description='Train or test neural net motor controller.')
parser.add_argument('--train', dest='train', action='store_true', default=True)
parser.add_argument('--test', dest='test', action='store_false')
args = parser.parse_args()
if __name__ == '__main__':
# 初始化环境
env = gym.make(ENV_NAME)
env = env.unwrapped
# reproducible，设置随机种子，为了能够重现
env.seed(RANDOMSEED)
np.random.seed(RANDOMSEED)
tf.random.set_seed(RANDOMSEED)
# 定义状态空间，动作空间，动作幅度范围
s_dim = 50
a_dim = 50
a_bound = env.action_space.high
print('s_dim', s_dim)
print('a_dim', a_dim)
# 用DDPG算法
ddpg = DDPG(a_dim, s_dim, a_bound)
# 训练部分：
def launch(args):
rank = MPI.COMM_WORLD.Get_rank()
t_total_init = time.time()
# Make the environment
if args.algo == 'continuous':
args.env_name = 'FetchManipulate3ObjectsContinuous-v0'
args.multi_criteria_her = True
else:
args.env_name = 'FetchManipulate3Objects-v0'
env = gym.make(args.env_name)
# set random seeds for reproducibility
env.seed(args.seed + MPI.COMM_WORLD.Get_rank())
random.seed(args.seed + MPI.COMM_WORLD.Get_rank())
np.random.seed(args.seed + MPI.COMM_WORLD.Get_rank())
torch.manual_seed(args.seed + MPI.COMM_WORLD.Get_rank())
if args.cuda:
torch.cuda.manual_seed(args.seed + MPI.COMM_WORLD.Get_rank())
# get saving paths
if rank == 0:
logdir, model_path, bucket_path = init_storage(args)
logger.configure(dir=logdir)
logger.info(vars(args))
args.env_params = get_env_params(env)
if args.algo == 'language':
language_goal = get_instruction()
goal_sampler = GoalSampler(args)
else:
language_goal = None
goal_sampler = GoalSampler(args)
# Initialize RL Agent
if args.agent == "SAC":
policy = RLAgent(args, env.compute_reward, goal_sampler)
else:
raise NotImplementedError
# Initialize Rollout Worker
rollout_worker = RolloutWorker(env, policy, goal_sampler, args)
# Main interaction loop
episode_count = 0
for epoch in range(args.n_epochs):
t_init = time.time()
# setup time_tracking
time_dict = dict(goal_sampler=0,
rollout=0,
gs_update=0,
store=0,
norm_update=0,
policy_train=0,
lp_update=0,
eval=0,
epoch=0)
# log current epoch
if rank == 0: logger.info('\n\nEpoch #{}'.format(epoch))
# Cycles loop
for _ in range(args.n_cycles):
# Sample goals
t_i = time.time()
goals, self_eval = goal_sampler.sample_goal(
n_goals=args.num_rollouts_per_mpi, evaluation=False)
if args.algo == 'language':
language_goal_ep = np.random.choice(
language_goal, size=args.num_rollouts_per_mpi)
else:
language_goal_ep = None
time_dict['goal_sampler'] += time.time() - t_i
# Control biased initializations
if epoch < args.start_biased_init:
biased_init = False
else:
biased_init = args.biased_init
# Environment interactions
t_i = time.time()
episodes = rollout_worker.generate_rollout(
goals=goals, # list of goal configurations
self_eval=
self_eval, # whether the agent performs self-evaluations
true_eval=False, # these are not offline evaluation episodes
biased_init=biased_init,
language_goal=language_goal_ep
) # whether initializations should be biased.
time_dict['rollout'] += time.time() - t_i
# Goal Sampler updates
t_i = time.time()
episodes = goal_sampler.update(episodes, episode_count)
time_dict['gs_update'] += time.time() - t_i
# Storing episodes
t_i = time.time()
policy.store(episodes)
time_dict['store'] += time.time() - t_i
# Updating observation normalization
t_i = time.time()
for e in episodes:
policy._update_normalizer(e)
time_dict['norm_update'] += time.time() - t_i
# Policy updates
t_i = time.time()
for _ in range(args.n_batches):
policy.train()
time_dict['policy_train'] += time.time() - t_i
episode_count += args.num_rollouts_per_mpi * args.num_workers
# Updating Learning Progress
t_i = time.time()
if goal_sampler.curriculum_learning and rank == 0:
goal_sampler.update_LP()
goal_sampler.sync()
time_dict['lp_update'] += time.time() - t_i
time_dict['epoch'] += time.time() - t_init
time_dict['total'] = time.time() - t_total_init
if args.evaluations:
if rank == 0: logger.info('\tRunning eval ..')
# Performing evaluations
t_i = time.time()
if args.algo == 'language':
ids = np.random.choice(np.arange(35), size=len(language_goal))
eval_goals = goal_sampler.valid_goals[ids]
else:
eval_goals = goal_sampler.valid_goals
episodes = rollout_worker.generate_rollout(
goals=eval_goals,
self_eval=True, # this parameter is overridden by true_eval
true_eval=True, # this is offline evaluations
biased_init=False,
language_goal=language_goal)
# Extract the results
if args.algo == 'continuous':
results = np.array([e['rewards'][-1] == 3.
for e in episodes]).astype(np.int)
elif args.algo == 'language':
results = np.array([
e['language_goal']
in sentence_from_configuration(config=e['ag'][-1],
all=True) for e in episodes
]).astype(np.int)
else:
results = np.array([
str(e['g'][0]) == str(e['ag'][-1]) for e in episodes
]).astype(np.int)
rewards = np.array([e['rewards'][-1] for e in episodes])
all_results = MPI.COMM_WORLD.gather(results, root=0)
all_rewards = MPI.COMM_WORLD.gather(rewards, root=0)
time_dict['eval'] += time.time() - t_i
# Logs
if rank == 0:
assert len(all_results) == args.num_workers # MPI test
av_res = np.array(all_results).mean(axis=0)
av_rewards = np.array(all_rewards).mean(axis=0)
global_sr = np.mean(av_res)
log_and_save(goal_sampler, epoch, episode_count, av_res,
av_rewards, global_sr, time_dict)
# Saving policy models
if epoch % args.save_freq == 0:
policy.save(model_path, epoch)
goal_sampler.save_bucket_contents(bucket_path, epoch)
if rank == 0:
logger.info('\tEpoch #{}: SR: {}'.format(epoch, global_sr))
if __name__ == '__main__':
num_eval = 20
path = './trained_model/'
with open(path + 'config.json', 'r') as f:
params = json.load(f)
args = SimpleNamespace(**params)
# Make the environment
env = gym.make(args.env_name)
# set random seeds for reproduce
args.seed = np.random.randint(1e6)
env.seed(args.seed + MPI.COMM_WORLD.Get_rank())
random.seed(args.seed + MPI.COMM_WORLD.Get_rank())
np.random.seed(args.seed + MPI.COMM_WORLD.Get_rank())
torch.manual_seed(args.seed + MPI.COMM_WORLD.Get_rank())
if args.cuda:
torch.cuda.manual_seed(args.seed + MPI.COMM_WORLD.Get_rank())
args.env_params = get_env_params(env)
goal_sampler = GoalSampler(args)
eval_goals = goal_sampler.valid_goals
inits = [None] * len(eval_goals)
all_results = []
with open(path + 'inst_to_one_hot.pkl', 'rb') as f:
def train_dqn(size, agt, eps_start=1.0, eps_end=0.05, eps_decay=0.999):
env = gym.make('game2048-v0', size=size, norm=FLAGS.norm)
env.seed(1)
if FLAGS.norm:
channels = size * size + 2
else:
channels = 1
agent = model.DQNAgent(size, channels, 4, 0, FLAGS.double_q, FLAGS.dueling)
if FLAGS.model_file:
print(f'load {FLAGS.model_file}')
agent.load(FLAGS.model_file)
total_steps = 0
total_scores = 0
highest_score = 0
trials = 10000
eps = eps_start
scores_window = deque(maxlen=WINDOWS_SIZE)
rewards_window = deque(maxlen=WINDOWS_SIZE)
scores = []
sd_name = 'model_%dx%d.checkpoint' % (size, size)
random = False
for trial in range(1, trials + 1):
obs = env.reset()
stepno = 0
rewards = 0
loss = 0
while True:
stepno += 1
total_steps += 1
action, _ = agent.choose_action(obs, eps, rand=random)
obs_, reward, done, _ = env.step(action)
random = np.all(obs == obs_)
loss = agent.step(obs, action, reward, obs_, done)
obs = obs_
rewards += reward
if done:
break
eps = max(eps_end, eps * eps_decay)
rewards_window.append(rewards)
scores_window.append(env.get_score())
scores.append(rewards)
# env.render()
if env.get_score() > highest_score:
highest_score = env.get_score()
total_scores += env.get_score()
print(
'\rEpisode {}\t Steps: {}\t\t Average Reward: {:.2f}\t\t Average Scores: {:.2f}\t loss: {:.2f}\t highest: {}\t eps: {:.4f}'
.format(trial, total_steps, np.mean(rewards_window),
np.mean(scores_window), loss, highest_score, eps),
end="")
if trial % WINDOWS_SIZE == 0:
print(
'\rEpisode {}\t Steps: {}\t\t Average Reward: {:.2f}\t\t Average Scores: {:.2f}\t loss: {:.2f}\t highest: {}\t eps: {:.4f}'
.format(trial, total_steps, np.mean(rewards_window),
np.mean(scores_window), loss, highest_score, eps))
if trial % 1000 == 0:
agent.save(sd_name)
eval(env, agent, 1000, render=False)
print(f'steps: {total_steps} avg_score: {total_scores / trials} \
highest_score: {highest_score} at size: {size}')
plot_score(scores, [])