docstr: create actors for parallel training.
          
docstr_tok: ["create","actors","for","parallel","training","."]
code: def create_actors(self):
      """create actors for parallel training."""
  
      parl.connect(self.config["master_address"])
      self.remote_actors = [
          Actor(self.config) for _ in range(self.config["actor_num"])
      ]
      logger.info(
          "Creating {} remote actors to connect.".format(
              self.config["actor_num"]
          )
      )
      self.start_time = time.time()
  
imports: import time
  import gym
  import os
  import parl
  import numpy
  import utils
  import argparse
  from es import ES
  from obs_filter import MeanStdFilter
  from mujoco_agent import MujocoAgent
  from mujoco_model import MujocoModel
  from noise import SharedNoiseTable
  from parl.utils import logger, summary
  from parl.env import CompatWrapper
  from parl.utils.window_stat import WindowStat
  from actor import Actor
label_desc: Use image node_id 2 for calling the Learner obj's underlying member method code with example usage: obj.create_actors() without return types