code: def _common(self, fn, expected_ops):
      args1 = [torch.randn(10), torch.randn(10)]
      args2 = [torch.randn(10), torch.randn(10)]
      cnt = CompileCounter()
      fn_dynamo = torch._dynamo.optimize_assert(cnt)(fn)
      reset_tape()
      res1 = fn_dynamo(*args1)
      reset_tape()
      res2 = fn_dynamo(*args2)
      reset_tape()
      self.assertTrue(same(res1, fn(*args1)))
      reset_tape()
      self.assertTrue(same(res2, fn(*args2)))
      reset_tape()
      self.assertEqual(cnt.frame_count, 1)
      self.assertEqual(cnt.op_count, expected_ops)
  
imports: from typing import Callable, Dict, List, NamedTuple, Optional
  import torch
  import torch._dynamo
  from torch._dynamo.test_case import run_tests, TestCase
  from torch._dynamo.testing import CompileCounter, same
label_desc: Use image node_id 1 for calling the TestPythonAutograd obj's underlying member method code with example usage: obj._common(fn, expected_ops) without return types