def test_needs_reset(self):
outdir = tempfile.mkdtemp()
agent = mock.Mock()
agent.act.side_effect = [0, 1, 2, 3, 4]
env = mock.Mock()
# First episode: 0 -> 1 -> 2 -> 3 (reset)
# Second episode: 4 -> 5 -> 6 -> 7 (done)
env.reset.side_effect = [('state', 0), ('state', 4)]
env.step.side_effect = [
(('state', 1), 0, False, {}),
(('state', 2), 0, False, {}),
(('state', 3), 0, False, {
'needs_reset': True
}),
(('state', 5), -0.5, False, {}),
(('state', 7), 1, True, {}),
]
if (not self.n_steps and not self.n_episodes) or \
(self.n_steps and self.n_episodes):
with self.assertRaises(AssertionError):
experiments.collect_demonstrations(agent, env, self.n_steps,
self.n_episodes, outdir,
None, None)
return
steps = self.n_steps
# 2 to match the mock env, b/c test is parameterized by episodes=1
episodes = 2 if self.n_episodes else self.n_episodes
experiments.collect_demonstrations(agent,
env,
steps,
episodes,
outdir,
max_episode_len=None,
logger=None)
self.assertEqual(agent.act.call_count, 5)
self.assertEqual(agent.stop_episode.call_count, 2)
self.assertEqual(env.reset.call_count, 2)
self.assertEqual(env.step.call_count, 5)
true_states = [0, 1, 2, 4, 5]
true_next_states = [1, 2, 3, 5, 7]
true_actions = [0, 1, 2, 3, 4]
true_rewards = [0, 0, 0, -0.5, 1]
with chainer.datasets.open_pickle_dataset(
os.path.join(outdir, "demos.pickle")) as dataset:
self.assertEqual(len(dataset), 5)
for i in range(5):
obs, a, r, new_obs, _, _ = dataset[i]
self.assertEqual(obs[1], true_states[i])
self.assertEqual(a, true_actions[i])
self.assertEqual(r, true_rewards[i])
self.assertEqual(new_obs[1], true_next_states[i])
def test(self):
outdir = tempfile.mkdtemp()
env = mock.Mock()
# Reaches the terminal state after five actions
env.reset.side_effect = [('state', 0)]
env.step.side_effect = [
(('state', 1), 0, False, {}),
(('state', 2), 0, False, {}),
(('state', 3), -0.5, False, {}),
(('state', 4), 0, False, {}),
(('state', 5), 1, True, {}),
]
agent = mock.Mock()
agent.act.side_effect = [0, 1, 2, 3, 4]
if (not self.n_steps and not self.n_episodes) or \
(self.n_steps and self.n_episodes):
with self.assertRaises(AssertionError):
experiments.collect_demonstrations(agent, env, self.n_steps,
self.n_episodes, outdir,
None, None)
return
experiments.collect_demonstrations(agent,
env,
self.n_steps,
self.n_episodes,
outdir,
max_episode_len=None,
logger=None)
self.assertEqual(agent.act.call_count, 5)
self.assertEqual(agent.stop_episode.call_count, 1)
self.assertEqual(env.reset.call_count, 1)
self.assertEqual(env.step.call_count, 5)
true_states = [0, 1, 2, 3, 4]
true_next_states = [1, 2, 3, 4, 5]
true_actions = [0, 1, 2, 3, 4]
true_rewards = [0, 0, -0.5, 0, 1]
with chainer.datasets.open_pickle_dataset(
os.path.join(outdir, "demos.pickle")) as dataset:
self.assertEqual(len(dataset), 5)
for i in range(5):
obs, a, r, new_obs, _, _ = dataset[i]
self.assertEqual(obs[1], true_states[i])
self.assertEqual(a, true_actions[i])
self.assertEqual(r, true_rewards[i])
self.assertEqual(new_obs[1], true_next_states[i])
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--env',
type=str,
default='BreakoutNoFrameskip-v4',
help='OpenAI Atari domain to perform algorithm on.')
parser.add_argument('--outdir',
type=str,
default='results',
help='Directory path to save output files.'
' If it does not exist, it will be created.')
parser.add_argument('--seed',
type=int,
default=0,
help='Random seed [0, 2 ** 31)')
parser.add_argument('--gpu',
type=int,
default=0,
help='GPU to use, set to -1 if no GPU.')
parser.add_argument('--load', type=str, default=None, required=True)
parser.add_argument('--logging-level',
type=int,
default=20,
help='Logging level. 10:DEBUG, 20:INFO etc.')
parser.add_argument('--render',
action='store_true',
default=False,
help='Render env states in a GUI window.')
parser.add_argument('--monitor',
action='store_true',
default=False,
help='Monitor env. Videos and additional information'
' are saved as output files.')
parser.add_argument('--steps',
type=int,
default=5 * 10**7,
help='Total number of demo timesteps to collect')
args = parser.parse_args()
import logging
logging.basicConfig(level=args.logging_level)
# Set a random seed used in ChainerRL.
misc.set_random_seed(args.seed, gpus=(args.gpu, ))
args.outdir = experiments.prepare_output_dir(args, args.outdir)
print('Output files are saved in {}'.format(args.outdir))
def make_env():
env = atari_wrappers.wrap_deepmind(atari_wrappers.make_atari(
args.env, max_frames=None),
episode_life=False,
clip_rewards=False)
env.seed(int(args.seed))
# Randomize actions like epsilon-greedy
env = chainerrl.wrappers.RandomizeAction(env, 0.01)
if args.monitor:
env = chainerrl.wrappers.Monitor(env,
args.outdir,
mode='evaluation')
if args.render:
env = chainerrl.wrappers.Render(env)
return env
env = make_env()
n_actions = env.action_space.n
q_func = links.Sequence(links.NatureDQNHead(), L.Linear(512, n_actions),
DiscreteActionValue)
# Draw the computational graph and save it in the output directory.
chainerrl.misc.draw_computational_graph(
[q_func(np.zeros((4, 84, 84), dtype=np.float32)[None])],
os.path.join(args.outdir, 'model'))
# The optimizer and replay buffer are dummy variables required by agent
opt = optimizers.RMSpropGraves()
opt.setup(q_func)
rbuf = replay_buffer.ReplayBuffer(1)
def phi(x):
# Feature extractor
return np.asarray(x, dtype=np.float32) / 255
Agent = agents.DQN
agent = Agent(q_func,
opt,
rbuf,
gpu=args.gpu,
gamma=0.99,
explorer=None,
replay_start_size=1,
minibatch_size=1,
target_update_interval=None,
clip_delta=True,
update_interval=4,
phi=phi)
agent.load(args.load)
# saves demos to outdir/demos.pickle
experiments.collect_demonstrations(agent=agent,
env=env,
steps=args.steps,
episodes=None,
outdir=args.outdir,
max_episode_len=None)
