code: def test_dti_convert_tz_aware_datetime_datetime(self, tz):
      # GH#1581
      dates = [
          datetime(2000, 1, 1),
          datetime(2000, 1, 2),
          datetime(2000, 1, 3),
      ]
  
      dates_aware = [
          conversion.localize_pydatetime(x, tz) for x in dates
      ]
      result = DatetimeIndex(dates_aware).as_unit("ns")
      assert timezones.tz_compare(result.tz, tz)
  
      converted = to_datetime(dates_aware, utc=True).as_unit("ns")
      ex_vals = np.array(
          [Timestamp(x).as_unit("ns")._value for x in dates_aware]
      )
      tm.assert_numpy_array_equal(converted.asi8, ex_vals)
      assert converted.tz is timezone.utc
  
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 11 for calling the TestDatetimeIndexTimezones obj's underlying member method code with example usage: obj.test_dti_convert_tz_aware_datetime_datetime(tz) without return types