code: def test_with_tz(self, tz):
      # just want it to work
      start = datetime(2011, 3, 12, tzinfo=pytz.utc)
      dr = bdate_range(start, periods=50, freq=pd.offsets.Hour())
      assert dr.tz is pytz.utc
  
      # DateRange with naive datetimes
      dr = bdate_range("1/1/2005", "1/1/2009", tz=pytz.utc)
      dr = bdate_range("1/1/2005", "1/1/2009", tz=tz)
  
      # normalized
      central = dr.tz_convert(tz)
      assert central.tz is tz
      naive = central[0].to_pydatetime().replace(tzinfo=None)
      comp = conversion.localize_pydatetime(naive, tz).tzinfo
      assert central[0].tz is comp
  
      # compare vs a localized tz
      naive = dr[0].to_pydatetime().replace(tzinfo=None)
      comp = conversion.localize_pydatetime(naive, tz).tzinfo
      assert central[0].tz is comp
  
      # datetimes with tzinfo set
      dr = bdate_range(
          datetime(2005, 1, 1, tzinfo=pytz.utc),
          datetime(2009, 1, 1, tzinfo=pytz.utc),
      )
      msg = "Start and end cannot both be tz-aware with different timezones"
      with pytest.raises(Exception, match=msg):
          bdate_range(
              datetime(2005, 1, 1, tzinfo=pytz.utc), "1/1/2009", tz=tz
          )
  
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 10 for calling the TestDatetimeIndexTimezones obj's underlying member method code with example usage: obj.test_with_tz(tz) without return types