code: def test_dti_week(self):
      # GH#6538: Check that DatetimeIndex and its TimeStamp elements
      # return the same weekofyear accessor close to new year w/ tz
      dates = ["2013/12/29", "2013/12/30", "2013/12/31"]
      dates = DatetimeIndex(dates, tz="Europe/Brussels")
      expected = [52, 1, 1]
      assert dates.isocalendar().week.tolist() == expected
      assert [d.weekofyear for d in dates] == expected
  
imports: import calendar
  from datetime import date, datetime, time
  import locale
  import unicodedata
  import numpy
  import pytest
  from pandas._libs.tslibs import timezones
  from pandas import DatetimeIndex, Index, NaT, Timestamp, date_range, offsets
  import pandas._testing
  from pandas.core.arrays import DatetimeArray
label_desc: Use image node_id 11 for calling the TestDatetimeIndexOps obj's underlying member method code with example usage: obj.test_dti_week() without return types