code: def test_subtract_timestamp_from_different_timezone(self):
      t1 = Timestamp("20130101").tz_localize("US/Eastern")
      t2 = Timestamp("20130101").tz_localize("CET")
  
      result = t1 - t2
  
      assert isinstance(result, Timedelta)
      assert result == Timedelta("0 days 06:00:00")
  
imports: from datetime import datetime, timedelta, timezone
  from dateutil.tz import gettz
  import numpy
  import pytest
  import pytz
  from pandas._libs.tslibs import OutOfBoundsDatetime, OutOfBoundsTimedelta, Timedelta, Timestamp, offsets, to_offset
  import pandas._testing
label_desc: Use image node_id 8 for calling the TestTimestampArithmetic obj's underlying member method code with example usage: obj.test_subtract_timestamp_from_different_timezone() without return types