code: def test_wrong_type(self):
      # common cases which apply to all the below
      with pytest.raises(TypeError):
          self.conv({})
      with pytest.raises(TypeError):
          self.conv([])
  
imports: import re
  import sys
  import pytest
  import numpy
  import numpy._core._multiarray_tests
  from numpy._core.multiarray import CLIP, WRAP, RAISE
  from numpy.testing import assert_warns, IS_PYPY
label_desc: Use image node_id 4 for calling the StringConverterTestCase obj's underlying member method code with example usage: obj.test_wrong_type() without return types