code: def test_append_nondatetimeindex(self):
      rng = date_range("1/1/2000", periods=10)
      idx = Index(["a", "b", "c", "d"])
  
      result = rng.append(idx)
      assert isinstance(result[0], Timestamp)
  
imports: import datetime
  from datetime import date
  import re
  import numpy
  import pytest
  from pandas.compat.numpy import np_long
  import pandas
  from pandas import DataFrame, DatetimeIndex, Index, Timestamp, date_range, offsets
  import pandas._testing
label_desc: Use image node_id 5 for calling the TestDatetimeIndex obj's underlying member method code with example usage: obj.test_append_nondatetimeindex() without return types