code: def setUp(self):
      gpu_count = get_gpu_count()
      if gpu_count > 0:
          place = fluid.CUDAPlace(0)
          self.gpu_id = 0
      else:
          place = fluid.CPUPlace()
          self.gpu_id = -1
      self.executor = fluid.Executor(place)
  
file_path: PARL/parl/algorithms/fluid/impala/tests/vtrace_test_fluid.py
imports: import copy
  import numpy
  import unittest
  from parl import layers
  from paddle import fluid
  from parameterized import parameterized
  from parl.algorithms.fluid.impala import vtrace
  from parl.utils import get_gpu_count
label_desc: Use image node_id 1 for calling the VtraceTest obj's underlying member method code with example usage: obj.setUp() without return types