class_docstr: Program definition for SVG0.
docstr: The Learning part of the agent.
docstr_tok: ["The","Learning","part","of","the","agent","."]
code: def learner(
      self,
      replay: reverb.Client,
      counter: counting.Counter,
  ):
      """The Learning part of the agent."""
  
      # Create the networks to optimize (online) and target networks.
      online_networks = self._network_factory(
          self._environment_spec.actions
      )
      target_networks = copy.deepcopy(online_networks)
  
      # Initialize the networks.
      online_networks.init(self._environment_spec)
      target_networks.init(self._environment_spec)
  
      dataset = self._builder.make_dataset_iterator(replay)
      counter = counting.Counter(counter, "learner")
      logger = loggers.make_default_logger(
          "learner",
          time_delta=self._log_every,
          steps_key="learner_steps",
      )
  
      return self._builder.make_learner(
          networks=(online_networks, target_networks),
          dataset=dataset,
          counter=counter,
          logger=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 5 for calling the DistributedSVG0 obj's underlying member method code with example usage: obj.learner(replay, counter) and returns: self