class_docstr: Program definition for SVG0.
docstr: The evaluation process.
docstr_tok: ["The","evaluation","process","."]
code: def evaluator(
      self,
      variable_source: acme.VariableSource,
      counter: counting.Counter,
      logger: Optional[loggers.Logger] = None,
  ):
      """The evaluation process."""
  
      # Create the behavior policy.
      networks = self._network_factory(self._environment_spec.actions)
      networks.init(self._environment_spec)
      policy_network = networks.make_policy()
  
      # Create the agent.
      actor = self._builder.make_actor(
          policy_network=policy_network,
          variable_source=variable_source,
          deterministic_policy=True,
      )
  
      # Make the environment.
      environment = self._environment_factory(True)
  
      # Create logger and counter.
      counter = counting.Counter(counter, "evaluator")
      logger = logger or loggers.make_default_logger(
          "evaluator",
          time_delta=self._log_every,
          steps_key="evaluator_steps",
      )
  
      # Create the run loop and return it.
      return acme.EnvironmentLoop(environment, actor, counter, logger)
  
imports: import copy
  from typing import Callable, Dict, Optional
  import acme
  from acme import specs
  from acme.agents.tf.svg0_prior import agent
  from acme.tf import savers
  from acme.utils import counting
  from acme.utils import loggers
  from acme.utils import lp_utils
  import dm_env
  import launchpad
  import reverb
  import sonnet
label_desc: Use image node_id 7 for calling the DistributedSVG0 obj's underlying member method code with example usage: obj.evaluator(variable_source, counter, logger) and returns: acme