code: def test_invalid_dtype(self):
      x = np.asarray(np.datetime64("2021-05-27"))
  
      with pytest.raises(BufferError):
          np.from_dlpack(x)
  
file_path: numpy/numpy/_core/tests/test_dlpack.py
imports: import sys
  import pytest
  import numpy
  from numpy.testing import assert_array_equal, IS_PYPY
label_desc: Use image node_id 6 for calling the TestDLPack obj's underlying member method code with example usage: obj.test_invalid_dtype() without return types