code: def sim_output(self, start, end):
      output = ""
      print(self.number)
      output += str(self.number)
      output += "\n"
      for i in range(start, end):
          print(i)
          output += str(i)
          output += "\n"
      return self.init_output + output
  
imports: import json
  import multiprocessing
  import os
  import pickle
  import subprocess
  import sys
  import tempfile
  import threading
  import time
  import unittest
  import requests
  import parl
  from parl.remote.client import disconnect, get_global_client
  from parl.utils import _IS_WINDOWS
  from parl.utils.test_utils import XparlTestCase
  from parl.utils import get_free_tcp_port
  from parl.remote.master import Master
label_desc: Use image node_id 2 for calling the Actor obj's underlying member method code with example usage: obj.sim_output(start, end) and returns: unknown