code: def test_rename_categories(self):
      cat = Categorical(["a", "b", "c", "a"])
  
      # inplace=False: the old one must not be changed
      res = cat.rename_categories([1, 2, 3])
      tm.assert_numpy_array_equal(
          res.__array__(), np.array([1, 2, 3, 1], dtype=np.int64)
      )
      tm.assert_index_equal(res.categories, Index([1, 2, 3]))
  
      exp_cat = np.array(["a", "b", "c", "a"], dtype=np.object_)
      tm.assert_numpy_array_equal(cat.__array__(), exp_cat)
  
      exp_cat = Index(["a", "b", "c"])
      tm.assert_index_equal(cat.categories, exp_cat)
  
      # GH18862 (let rename_categories take callables)
      result = cat.rename_categories(lambda x: x.upper())
      expected = Categorical(["A", "B", "C", "A"])
      tm.assert_categorical_equal(result, expected)
  
imports: import re
  import numpy
  import pytest
  from pandas.compat import PY311
  from pandas import Categorical, CategoricalIndex, DataFrame, Index, Series, StringDtype
  import pandas._testing
  from pandas.core.arrays.categorical import recode_for_categories
label_desc: Use image node_id 4 for calling the TestCategoricalAPI obj's underlying member method code with example usage: obj.test_rename_categories() without return types