code: def setUp(self):
      self.threads = torch.get_num_threads()
      torch.set_num_threads(4)
  
imports: from __future__ import annotations
  import unittest
  from unittest import skipUnless
  import torch
  import torch.nn
  from parameterized import parameterized
  from monai.networks import eval_mode
  from monai.networks.blocks.patchembedding import PatchEmbed, PatchEmbeddingBlock
  from monai.utils import optional_import
  from tests.utils import SkipIfBeforePyTorchVersion
label_desc: Use image node_id 1 for calling the TestPatchEmbeddingBlock obj's underlying member method code with example usage: obj.setUp() without return types