code: def test_fancy_setitem():
      dti = date_range(
          freq="WOM-1FRI",
          start=datetime(2005, 1, 1),
          end=datetime(2010, 1, 1),
      )
  
      s = Series(np.arange(len(dti)), index=dti)
  
      msg = (
          "Series.__setitem__ treating keys as positions is deprecated"
      )
      with tm.assert_produces_warning(FutureWarning, match=msg):
          s[48] = -1
      assert s.iloc[48] == -1
      s["1/2/2009"] = -2
      assert s.iloc[48] == -2
      s["1/2/2009":"2009-06-05"] = -3
      assert (s[48:54] == -3).all()
  
imports: from datetime import datetime, timedelta
  import re
  from dateutil.tz import gettz, tzutc
  import numpy
  import pytest
  import pytz
  from pandas._libs import index
  import pandas
  from pandas import DataFrame, Series, Timestamp, date_range, period_range
  import pandas._testing
label_desc: Use image node_id 2 for calling a global function with example usage: test_fancy_setitem() without return types