code: def test_weak_tensor_inheritance(self):
      a = WeakTensor.from_tensor(
          constant_op.constant([1, 2, 3], dtypes.int32)
      )
      self.assertIsInstance(a, WeakTensor)
      self.assertIsInstance(a, core.Tensor)
      self.assertIsInstance(a, extension_type.ExtensionType)
      if context.executing_eagerly():
          self.assertIsInstance(a, core.Value)
          self.assertIsInstance(a, EagerWeakTensor)
      else:
          self.assertIsInstance(a, core.Symbol)
          self.assertIsInstance(a, GraphWeakTensor)
  
imports: import numpy
  from tensorflow.python.eager import backprop
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import extension_type
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework.weak_tensor import EagerWeakTensor
  from tensorflow.python.framework.weak_tensor import GraphWeakTensor
  from tensorflow.python.framework.weak_tensor import WeakTensor
  from tensorflow.python.module import module
  from tensorflow.python.platform import googletest
  from tensorflow.python.saved_model.load import load
  from tensorflow.python.saved_model.save import save
  from tensorflow.python.types import core
label_desc: Use image node_id 3 for calling the WeakTensorTest obj's underlying member method code with example usage: obj.test_weak_tensor_inheritance() without return types