code: def test_series_multi(multiindex):
      """Test pd.Series output on a MultiIndex"""
      expected = multiindex.select_columns(
          pd.Series("bar"), slice("baz", "foo")
      )
      actual = multiindex.loc(axis=1)["bar":"foo"]
      assert_frame_equal(expected, actual)
  
imports: import datetime
  import re
  from itertools import product
  import numpy
  import pandas
  import pytest
  from pandas.api.types import is_numeric_dtype
  from pandas.testing import assert_frame_equal
  from janitor.functions.utils import DropLabel, get_columns, patterns
label_desc: Use image node_id 38 for calling a global function with example usage: test_series_multi(multiindex) without return types