code: def test_timestamp_equality_different_timezones(self):
      utc_range = date_range("1/1/2000", periods=20, tz="UTC")
      eastern_range = utc_range.tz_convert("US/Eastern")
      berlin_range = utc_range.tz_convert("Europe/Berlin")
  
      for a, b, c in zip(utc_range, eastern_range, berlin_range):
          assert a == b
          assert b == c
          assert a == c
  
      assert (utc_range == eastern_range).all()
      assert (utc_range == berlin_range).all()
      assert (berlin_range == eastern_range).all()
  
imports: from datetime import datetime, timedelta, timezone, tzinfo
  from dateutil.tz import gettz
  import numpy
  import pytest
  import pytz
  from pandas._libs.tslibs import conversion, timezones
  import pandas
  from pandas import DatetimeIndex, Timestamp, bdate_range, date_range, isna, to_datetime
  import pandas._testing
label_desc: Use image node_id 6 for calling the TestDatetimeIndexTimezones obj's underlying member method code with example usage: obj.test_timestamp_equality_different_timezones() without return types