code: def test_get_mixed_object():
      ser = Series(
          [
              "a_b_c",
              np.nan,
              "c_d_e",
              True,
              datetime.today(),
              None,
              1,
              2.0,
          ]
      )
      result = ser.str.split("_").str.get(1)
      expected = Series(
          ["b", np.nan, "d", np.nan, np.nan, None, np.nan, np.nan],
          dtype=object,
      )
      tm.assert_series_equal(result, expected)
  
imports: from datetime import datetime
  import re
  import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, _testing
  from pandas.tests.strings import _convert_na_value, object_pyarrow_numpy
label_desc: Use image node_id 45 for calling a global function with example usage: test_get_mixed_object() without return types