code: def test_stringize_deep_nonstr():
      with pytest.raises(TypeError):
          strings.stringize_deep(Convertible(), relaxed=False)
      x = Convertible()
      assert x == strings.stringize_deep(x)
  
imports: import pytest
  import six
  from library.python import strings
label_desc: Use image node_id 13 for calling a global function with example usage: test_stringize_deep_nonstr() without return types