code: def test_dti_astype_asobject_around_dst_transition(self, tzstr):
      # GH#1345
  
      # dates around a dst transition
      rng = date_range("2/13/2010", "5/6/2010", tz=tzstr)
  
      objs = rng.astype(object)
      for i, x in enumerate(objs):
          exval = rng[i]
          assert x == exval
          assert x.tzinfo == exval.tzinfo
  
      objs = rng.astype(object)
      for i, x in enumerate(objs):
          exval = rng[i]
          assert x == exval
          assert x.tzinfo == exval.tzinfo
  
imports: from datetime import datetime
  import dateutil
  import numpy
  import pytest
  import pytz
  import pandas
  from pandas import DatetimeIndex, Index, NaT, PeriodIndex, Timestamp, date_range
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestDatetimeIndex obj's underlying member method code with example usage: obj.test_dti_astype_asobject_around_dst_transition(tzstr) without return types