code: def testIncompatibleStructure(self):
      # Define three mutually incompatible values/structures, and assert that:
      # 1. Using one structure to flatten a value with an incompatible structure
      #    fails.
      # 2. Using one structure to restructure a flattened value with an
      #    incompatible structure fails.
      value_tensor = constant_op.constant(42.0)
      s_tensor = structure.type_spec_from_value(value_tensor)
      flat_tensor = structure.to_tensor_list(s_tensor, value_tensor)
  
      value_sparse_tensor = sparse_tensor.SparseTensor(
          indices=[[0, 0]], values=[1], dense_shape=[1, 1]
      )
      s_sparse_tensor = structure.type_spec_from_value(
          value_sparse_tensor
      )
      flat_sparse_tensor = structure.to_tensor_list(
          s_sparse_tensor, value_sparse_tensor
      )
  
      value_nest = {
          "a": constant_op.constant(37.0),
          "b": constant_op.constant([1, 2, 3]),
      }
      s_nest = structure.type_spec_from_value(value_nest)
      flat_nest = structure.to_tensor_list(s_nest, value_nest)
  
      with self.assertRaisesRegex(
          ValueError,
          r"SparseTensor.* is not convertible to a tensor with "
          r"dtype.*float32.* and shape \(\)",
      ):
          structure.to_tensor_list(s_tensor, value_sparse_tensor)
      with self.assertRaisesRegex(
          ValueError,
          "The two structures don't have the same nested structure.",
      ):
          structure.to_tensor_list(s_tensor, value_nest)
  
      with self.assertRaisesRegex(
          TypeError, "neither a SparseTensor nor SparseTensorValue"
      ):
          structure.to_tensor_list(s_sparse_tensor, value_tensor)
  
      with self.assertRaisesRegex(
          ValueError,
          "The two structures don't have the same nested structure.",
      ):
          structure.to_tensor_list(s_sparse_tensor, value_nest)
  
      with self.assertRaisesRegex(
          ValueError,
          "The two structures don't have the same nested structure.",
      ):
          structure.to_tensor_list(s_nest, value_tensor)
  
      with self.assertRaisesRegex(
          ValueError,
          "The two structures don't have the same nested structure.",
      ):
          structure.to_tensor_list(s_nest, value_sparse_tensor)
  
      with self.assertRaisesRegex(
          ValueError,
          "Cannot create a Tensor from the tensor list because item 0 "
          ".*tf.Tensor.* is incompatible with the expected TypeSpec "
          ".*TensorSpec.*",
      ):
          structure.from_tensor_list(s_tensor, flat_sparse_tensor)
  
      with self.assertRaisesRegex(
          ValueError, "Expected 1 tensors but got 2."
      ):
          structure.from_tensor_list(s_tensor, flat_nest)
  
      with self.assertRaisesRegex(
          ValueError,
          "Cannot create a SparseTensor from the tensor list because "
          "item 0 .*tf.Tensor.* is incompatible with the expected TypeSpec "
          ".*TensorSpec.*",
      ):
          structure.from_tensor_list(s_sparse_tensor, flat_tensor)
  
      with self.assertRaisesRegex(
          ValueError, "Expected 1 tensors but got 2."
      ):
          structure.from_tensor_list(s_sparse_tensor, flat_nest)
  
      with self.assertRaisesRegex(
          ValueError, "Expected 2 tensors but got 1."
      ):
          structure.from_tensor_list(s_nest, flat_tensor)
  
      with self.assertRaisesRegex(
          ValueError, "Expected 2 tensors but got 1."
      ):
          structure.from_tensor_list(s_nest, flat_sparse_tensor)
  
imports: import collections
  import dataclasses
  import functools
  from absl.testing import parameterized
  import numpy
  import wrapt
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.util import nest
  from tensorflow.python.data.util import structure
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import tensor_array_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.ops.ragged import ragged_tensor_value
  from tensorflow.python.platform import test
  from tensorflow.python.util.compat import collections_abc
label_desc: Use image node_id 10 for calling the StructureTest obj's underlying member method code with example usage: obj.testIncompatibleStructure() without return types