class_docstr: Base class for ExtensionDtype classes
class_docstr_tok: ["Base","class","for","ExtensionDtype","classes"]
code: def test_is_dtype_from_self(self, dtype):
      result = type(dtype).is_dtype(dtype)
      assert result is True
  
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 5 for calling the BaseDtypeTests obj's underlying member method code with example usage: obj.test_is_dtype_from_self(dtype) without return types