code: def test_append_mismatched_categories(self, ci):
      # appending with different categories or reordered is not ok
      msg = "all inputs must be Index"
      with pytest.raises(TypeError, match=msg):
          ci.append(ci.values.set_categories(list("abcd")))
      with pytest.raises(TypeError, match=msg):
          ci.append(ci.values.reorder_categories(list("abc")))
  
file_path: pandas/pandas/tests/indexes/categorical/test_append.py
imports: import pytest
  from pandas import CategoricalIndex, Index
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestAppend obj's underlying member method code with example usage: obj.test_append_mismatched_categories(ci) without return types