code: def test_getitem_slice(self):
      cat = Categorical(["a", "b", "c", "d", "a", "b", "c"])
      sliced = cat[3]
      assert sliced == "d"
  
      sliced = cat[3:5]
      expected = Categorical(
          ["d", "a"], categories=["a", "b", "c", "d"]
      )
      tm.assert_categorical_equal(sliced, expected)
  
imports: import math
  import numpy
  import pytest
  from pandas import NA, Categorical, CategoricalIndex, Index, Interval, IntervalIndex, NaT, PeriodIndex, Series, Timedelta, Timestamp
  import pandas._testing
  import pandas.core.common
label_desc: Use image node_id 1 for calling the TestCategoricalIndexing obj's underlying member method code with example usage: obj.test_getitem_slice() without return types