code: def test_constant_weak_tensor_creation(self):
      a = constant_op.constant(1)
      self.assertIsInstance(a, WeakTensor)
  
      a = constant_op.constant(1, dtypes.int32)
      self.assertIsInstance(a, tensor.Tensor)
  
      # convert_to_tensor should unwrap WeakTensor to Tensor.
      a = ops.convert_to_tensor(1)
      self.assertIsInstance(a, tensor.Tensor)
  
      a = ops.convert_to_tensor(WeakTensor.from_tensor(a))
      self.assertIsInstance(a, tensor.Tensor)
  
imports: from absl.testing import parameterized
  import numpy
  from google.protobuf import text_format
  from tensorflow.core.framework import graph_pb2
  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 flexible_dtypes
  from tensorflow.python.framework import importer
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_util
  from tensorflow.python.framework import test_util
  from tensorflow.python.framework.weak_tensor import WeakTensor
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import weak_tensor_ops
  from tensorflow.python.ops import weak_tensor_test_util
  from tensorflow.python.ops.parallel_for import control_flow_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 3 for calling the WeakTensorConstantOpTest obj's underlying member method code with example usage: obj.test_constant_weak_tensor_creation() without return types