code: def test_weak_tensor_basic(self):
      a = WeakTensor.from_tensor(constant_op.constant(1, dtypes.int32))
      self.assertEqual(a.dtype, dtypes.int32)
      self.assertEqual(a.shape, [])
  
      b = [1.0, 2.0], [3.0, 4.0]
      b_wt = WeakTensor.from_tensor(
          constant_op.constant(b, dtypes.float32)
      )
      self.assertEqual(b_wt.dtype, dtypes.float32)
      self.assertEqual(b_wt.shape, [2, 2])
  
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 1 for calling the WeakTensorTest obj's underlying member method code with example usage: obj.test_weak_tensor_basic() without return types