code: def test_assign(self):
      def fn(a):
          tmp = unet_2d.UNet2DOutput(a + 1)
          tmp.sample = a + 2
          return tmp
  
      args = [torch.randn(10)]
      obj1 = fn(*args)
  
      cnts = torch._dynamo.testing.CompileCounter()
      opt_fn = torch._dynamo.optimize_assert(cnts)(fn)
      obj2 = opt_fn(*args)
      self.assertTrue(same(obj1.sample, obj2.sample))
      self.assertEqual(cnts.frame_count, 1)
      self.assertEqual(cnts.op_count, 2)
  
file_path: pytorch/test/dynamo/test_base_output.py
imports: import unittest.mock
  import torch
  import torch._dynamo.test_case
  import torch._dynamo.testing
  from torch._dynamo.testing import same
label_desc: Use image node_id 2 for calling the TestBaseOutput obj's underlying member method code with example usage: obj.test_assign() and returns: tmp