code: def test_getitem_with_datestring_with_UTC_offset(self, start, end):
      # GH 24076
      idx = date_range(
          start="2018-12-02 14:50:00-07:00",
          end="2018-12-02 14:50:00-07:00",
          freq="1min",
      )
      df = DataFrame(1, index=idx, columns=["A"])
      result = df[start:end]
      expected = df.iloc[0:3, :]
      tm.assert_frame_equal(result, expected)
  
      # GH 16785
      start = str(start)
      end = str(end)
      with pytest.raises(ValueError, match="Both dates must"):
          df[start : end[:-4] + "1:00"]
  
      df = df.tz_localize(None)
      with pytest.raises(
          ValueError, match="The index must be timezone"
      ):
          df[start:end]
  
imports: from datetime import datetime
  import numpy
  import pytest
  from pandas import DataFrame, DatetimeIndex, Index, MultiIndex, Series, Timedelta, Timestamp, date_range
  import pandas._testing
label_desc: Use image node_id 20 for calling the TestSlicing obj's underlying member method code with example usage: obj.test_getitem_with_datestring_with_UTC_offset(start, end) without return types