tf_agents.trajectories.TimeStep

Returned with every call to step and reset on an environment.

View aliases

Main aliases

tf_agents.trajectories.time_step.TimeStep

tf_agents.trajectories.TimeStep(
    step_type, reward, discount, observation
)

A TimeStep contains the data emitted by an environment at each step of interaction. A TimeStep holds a step_type, an observation (typically a NumPy array or a dict or list of arrays), and an associated reward and discount.

The first TimeStep in a sequence will equal StepType.FIRST. The final TimeStep will equal StepType.LAST. All other TimeSteps in a sequence will equal `StepType.MID.

Attributes
step_type	a Tensor or array of StepType enum values.
reward	a Tensor or array of reward values.
discount	A discount value in the range [0, 1].
observation	A NumPy array, or a nested dict, list or tuple of arrays.

Methods

is_first

View source

is_first() -> tf_agents.typing.types.Bool

is_last

View source

is_last() -> tf_agents.typing.types.Bool

is_mid

View source

is_mid() -> tf_agents.typing.types.Bool