class_docstr: Base class for ExtensionDtype classes
class_docstr_tok: ["Base","class","for","ExtensionDtype","classes"]
code: def test_is_not_object_type(self, dtype):
      assert not is_object_dtype(dtype)
  
imports: import numpy
  import pytest
  import pandas
  import pandas._testing
  from pandas.api.types import infer_dtype, is_object_dtype, is_string_dtype
label_desc: Use image node_id 8 for calling the BaseDtypeTests obj's underlying member method code with example usage: obj.test_is_not_object_type(dtype) without return types