docstr: setup any state tied to the execution of the given method in a
  class.  setup_method is invoked for every test method of a class.
docstr_tok: ["setup","any","state","tied","to","the","execution","of","the","given","method","in","a","class",".","setup_method","is","invoked","for","every","test","method","of","a","class","."]
code: def setUp(self):
      """setup any state tied to the execution of the given method in a
      class.  setup_method is invoked for every test method of a class.
      """
      self.sc = init_orca_context(cores=4)
  
file_path: BigDL/python/orca/test/bigdl/orca/learn/jep/test_pytorch_estimator_for_save_load.py
imports: from unittest import TestCase
  import os
  import pytest
  import torch
  import torch.nn
  import torch.nn.functional
  from torchvision import datasets, transforms
  from bigdl.orca import init_orca_context, stop_orca_context
  from bigdl.orca import OrcaContext
  from bigdl.orca.learn.pytorch import Estimator
  from bigdl.orca.learn.metrics import Accuracy
  from bigdl.orca.learn.trigger import EveryEpoch
label_desc: Use image node_id 1 for calling the TestEstimatorForSaveAndLoad obj's underlying member method code with example usage: obj.setUp() without return types