def make_environment_spec(environment: dm_env.Environment) -> EnvironmentSpec:
"""Returns an `EnvironmentSpec` describing values used by an environment."""
return EnvironmentSpec(
observations=environment.observation_spec(),
actions=environment.action_spec(),
rewards=environment.reward_spec(),
discounts=environment.discount_spec())
def transition_dataset(environment: dm_env.Environment) -> tf.data.Dataset:
"""Fake dataset of Reverb N-step transition samples.
Args:
environment: Used to create a fake transition by looking at the
observation, action, discount and reward specs.
Returns:
tf.data.Dataset that produces the same fake N-step transition ReverSample
object indefinitely.
"""
observation = environment.observation_spec().generate_value()
action = environment.action_spec().generate_value()
reward = environment.reward_spec().generate_value()
discount = environment.discount_spec().generate_value()
data = (observation, action, reward, discount, observation)
key = np.array(0, np.uint64)
probability = np.array(1.0, np.float64)
table_size = np.array(1, np.int64)
priority = np.array(1.0, np.float64)
info = reverb.SampleInfo(key=key,
probability=probability,
table_size=table_size,
priority=priority)
sample = reverb.ReplaySample(info=info, data=data)
return tf.data.Dataset.from_tensors(sample).repeat()
def __init__(
self,
env: Environment,
alpha: float,
lamda: float,
n_features: int,
logger: Logger = NullLogger(),
):
super().__init__()
self.alpha = alpha
self.lamda = lamda
self.w = jnp.zeros(n_features + 1)
self.z = jnp.zeros(n_features + 1)
self.logger = logger
self.policy = EGreedy(env.action_spec, 0.1)
# temporary value estimate for the starting state
self._actions = jnp.arange(env.action_spec().num_actions)
self._q_old = jnp.zeros(env.action_spec().num_values)
def _make_ma_environment_spec(
self,
environment: dm_env.Environment) -> Dict[str, EnvironmentSpec]:
"""Returns an `EnvironmentSpec` describing values used by
an environment for each agent."""
specs = {}
observation_specs = environment.observation_spec()
action_specs = environment.action_spec()
reward_specs = environment.reward_spec()
discount_specs = environment.discount_spec()
self.extra_specs = environment.extra_spec()
for agent in environment.possible_agents:
specs[agent] = EnvironmentSpec(
observations=observation_specs[agent],
actions=action_specs[agent],
rewards=reward_specs[agent],
discounts=discount_specs[agent],
)
return specs
def __init__(
self,
environment: dm_env.Environment,
additional_discount: float = 0.99,
max_abs_reward: Optional[float] = 1.0,
resize_shape: Optional[Tuple[int, int]] = (84, 84),
num_action_repeats: int = 4,
num_pooled_frames: int = 2,
zero_discount_on_life_loss: bool = True,
num_stacked_frames: int = 4,
grayscaling: bool = True,
):
rgb_spec, unused_lives_spec = environment.observation_spec()
if rgb_spec.shape[2] != 3:
raise ValueError(
'This wrapper assumes interleaved pixel observations with shape '
'(height, width, channels).')
if int(environment.action_spec().minimum) != 0:
raise ValueError('This wrapper assumes zero-indexed actions.')
self._environment = environment
self._processor = atari(
additional_discount=additional_discount,
max_abs_reward=max_abs_reward,
resize_shape=resize_shape,
num_action_repeats=num_action_repeats,
num_pooled_frames=num_pooled_frames,
zero_discount_on_life_loss=zero_discount_on_life_loss,
num_stacked_frames=num_stacked_frames,
grayscaling=grayscaling,
)
if grayscaling:
self._observation_shape = resize_shape + (num_stacked_frames, )
self._observation_spec_name = 'grayscale'
else:
self._observation_shape = resize_shape + (3, num_stacked_frames)
self._observation_spec_name = 'RGB'
self._reset_next_step = True
def transition_iterator(
environment: dm_env.Environment
) -> Callable[[int], Iterator[types.Transition]]:
"""Fake dataset of Reverb N-step transition samples.
Args:
environment: Used to create a fake transition by looking at the observation,
action, discount and reward specs.
Returns:
A callable that given a batch_size returns an iterator with demonstrations.
"""
observation = environment.observation_spec().generate_value()
action = environment.action_spec().generate_value()
reward = environment.reward_spec().generate_value()
discount = environment.discount_spec().generate_value()
data = types.Transition(observation, action, reward, discount, observation)
dataset = tf.data.Dataset.from_tensors(data).repeat()
return lambda batch_size: dataset.batch(batch_size).as_numpy_iterator()
def transition_dataset(environment: dm_env.Environment) -> tf.data.Dataset:
"""Fake dataset of Reverb N-step transition samples.
Args:
environment: Used to create a fake transition by looking at the observation,
action, discount and reward specs.
Returns:
tf.data.Dataset that produces the same fake N-step transition ReverSample
object indefinitely.
"""
observation = environment.observation_spec().generate_value()
action = environment.action_spec().generate_value()
reward = environment.reward_spec().generate_value()
discount = environment.discount_spec().generate_value()
data = types.Transition(observation, action, reward, discount, observation)
info = tree.map_structure(
lambda tf_dtype: tf.ones([], tf_dtype.as_numpy_dtype),
reverb.SampleInfo.tf_dtypes())
sample = reverb.ReplaySample(info=info, data=data)
return tf.data.Dataset.from_tensors(sample).repeat()
def __init__(self, environment: dm_env.Environment):
self._environment = environment
if int(environment.action_spec()[0].minimum) != 0:
raise ValueError(
'This wrapper assumes zero-indexed actions. Use the Atari setting '
'zero_indexed_actions=\"true\" to get actions in this format.')
def __init__(self, environment: dm_env.Environment, clip: bool = False):
super().__init__(environment)
self._action_spec = environment.action_spec()
self._clip = clip
