tf_agents.metrics.tf_metric.TFStepMetric

Defines the interface for TF metrics.

tf_agents.metrics.tf_metric.TFStepMetric(
    name, prefix='Metrics'
)

Methods

call

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call(
    *args, **kwargs
)

Accumulates statistics for the metric. Users should use call instead.

Args
*args

**kwargs A mini-batch of inputs to the Metric, as passed to __call__().

init_variables

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init_variables()

Initializes this Metric's variables.

Should be called after variables are created in the first execution of __call__(). If using graph execution, the return value should be run() in a session before running the op returned by __call__(). (See example above.)

Returns
If using graph execution, this returns an op to perform the initialization. Under eager execution, the variables are reset to their initial values as a side effect and this function returns None.

reset

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reset()

Resets the values being tracked by the metric.

result

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result()

Computes and returns a final value for the metric.

tf_summaries

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tf_summaries(
    train_step=None, step_metrics=()
)

Generates summaries against train_step and all step_metrics.

Args
train_step (Optional) Step counter for training iterations. If None, no metric is generated against the global step.
step_metrics (Optional) Iterable of step metrics to generate summaries against.

Returns
A list of summaries.

__call__

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__call__(
    *args, **kwargs
)

Returns op to execute to update this metric for these inputs.

Returns None if eager execution is enabled. Returns a graph-mode function if graph execution is enabled.

Args
*args

**kwargs A mini-batch of inputs to the Metric, passed on to call().