code: def main(unused_arg):
      env = catch.Catch(seed=FLAGS.seed)
      agent = OnlineQLambda(
          observation_spec=env.observation_spec(),
          action_spec=env.action_spec(),
          num_hidden_units=FLAGS.num_hidden_units,
          epsilon=FLAGS.epsilon,
          lambda_=FLAGS.lambda_,
          learning_rate=FLAGS.learning_rate,
      )
  
      accumulator = SequenceAccumulator(length=FLAGS.sequence_length)
      experiment.run_loop(
          agent=agent,
          environment=env,
          accumulator=accumulator,
          seed=FLAGS.seed,
          batch_size=1,
          train_episodes=FLAGS.train_episodes,
          evaluate_every=FLAGS.evaluate_every,
          eval_episodes=FLAGS.eval_episodes,
      )
  
imports: import collections
  from absl import app
  from absl import flags
  from bsuite.environments import catch
  import dm_env
  import haiku
  from haiku import nets
  import jax
  import jax.numpy
  import numpy
  import optax
  import rlax
  from rlax.examples import experiment
label_desc: Use image node_id 2 for calling a global function with example usage: main(unused_arg) without return types