code: def random_sum(self):
      return np.load(self.random_array).sum()
  
file_path: PARL/parl/remote/tests/sync_config_file_test.py
imports: import unittest
  import parl
  import os
  import time
  import threading
  import sys
  import numpy
  import json
  from parl.utils import get_free_tcp_port
  from parl.utils.test_utils import XparlTestCase
label_desc: Use image node_id 2 for calling the Actor obj's underlying member method code with example usage: obj.random_sum() and returns: np