code: def test_dtype_deprecation_warning():
      with warnings.catch_warnings(record=True) as w:
          warnings.simplefilter("always")
          TensorCPU(np.empty((0))).dtype()
          assert (
              "Calling '.dtype()' is deprecated, please use '.dtype' instead"
              == str(w[-1].message)
          )
  
imports: import numpy
  import nvidia.dali.fn
  import nvidia.dali.types
  import warnings
  from numpy.testing import assert_array_equal
  from nvidia.dali import pipeline_def
  from nvidia.dali.backend_impl import TensorCPU, TensorListCPU, TensorListGPU
  from nvidia.dali.backend_impl import types
  import nvidia.dali
  from nose_utils import assert_raises
  from nose import SkipTest
  from test_utils import dali_type_to_np, py_buffer_from_address, get_device_memory_info
label_desc: Use image node_id 24 for calling a global function with example usage: test_dtype_deprecation_warning() without return types