code: def test_dt_accessor_api_for_categorical_invalid(self):
      invalid = Series([1, 2, 3]).astype("category")
      msg = "Can only use .dt accessor with datetimelike"
  
      with pytest.raises(AttributeError, match=msg):
          invalid.dt
      assert not hasattr(invalid, "str")
  
file_path: pandas/pandas/tests/series/accessors/test_cat_accessor.py
imports: import numpy
  import pytest
  from pandas import Categorical, DataFrame, Index, Series, Timestamp, date_range, period_range, timedelta_range
  import pandas._testing
  from pandas.core.arrays.categorical import CategoricalAccessor
  from pandas.core.indexes.accessors import Properties
label_desc: Use image node_id 7 for calling the TestCatAccessor obj's underlying member method code with example usage: obj.test_dt_accessor_api_for_categorical_invalid() without return types