code: def test_iter(self, dtype):
      for xp in (numpy, cupy):
          x = testing.shaped_arange((), xp, dtype)
          with pytest.raises(TypeError):
              iter(x)
  
file_path: cupy/tests/cupy_tests/core_tests/test_iter.py
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestIterInvalid obj's underlying member method code with example usage: obj.test_iter(dtype) without return types