code: def test_inplace_foreach_leaf_check_and_grad_fn(
      self, device, dtype, op
  ):
      inplace_op = op.inplace_variant
      if inplace_op is None:
          self.skipTest("no in-place op available")
  
      sample = next(
          iter(
              op.sample_inputs(
                  dtype=dtype,
                  device=device,
                  num_input_tensors=[2],
                  same_size=True,
              )
          )
      )
      sample.input[0].requires_grad_(True)
      with self.assertRaisesRegex(
          RuntimeError, "a leaf Variable that requires grad"
      ):
          inplace_op(sample.input, *sample.args)
      sample.input[1].requires_grad_(True)
      with self.assertRaisesRegex(
          RuntimeError, "a leaf Variable that requires grad"
      ):
          inplace_op(sample.input, *sample.args)
  
      _tensors = [
          t.clone().detach().requires_grad_(i == 0)
          for i, t in enumerate(sample.input)
      ]
      tensors = [t.clone() for t in _tensors]
      inplace_op(tensors, *sample.args)
      self.assertIsNotNone(tensors[0].grad_fn)
      self.assertIsNone(tensors[1].grad_fn)
  
imports: from contextlib import nullcontext
  from numbers import Number
  import random
  import re
  import torch
  import unittest
  import itertools
  import weakref
  from torch.testing import make_tensor
  from torch.testing._comparison import default_tolerances
  from torch.testing._internal.common_cuda import TEST_MULTIGPU
  from torch.testing._internal.common_utils import TestCase, run_tests, TEST_WITH_ROCM, skipIfTorchDynamo, parametrize, gradcheck
  from torch.testing._internal.common_device_type import instantiate_device_type_tests, dtypes, onlyCUDA, ops, OpDTypes
  from torch.testing._internal.common_methods_invocations import foreach_unary_op_db, foreach_binary_op_db, foreach_pointwise_op_db, foreach_reduce_op_db, foreach_other_op_db
  from torch.testing._internal.common_dtype import all_types_and_complex_and, floating_types_and, floating_types, integral_types_and
label_desc: Use image node_id 20 for calling the TestForeach obj's underlying member method code with example usage: obj.test_inplace_foreach_leaf_check_and_grad_fn(device, dtype, op) without return types