code: def test_dti_contains_with_duplicates(self):
      d = datetime(2011, 12, 5, 20, 30)
      ix = DatetimeIndex([d, d])
      assert d in ix
  
imports: from datetime import date, datetime, time, timedelta
  import numpy
  import pytest
  from pandas._libs import index
  from pandas.compat.numpy import np_long
  import pandas
  from pandas import DatetimeIndex, Index, Timestamp, bdate_range, date_range, notna
  import pandas._testing
  from pandas.tseries.frequencies import to_offset
label_desc: Use image node_id 1 for calling the TestContains obj's underlying member method code with example usage: obj.test_dti_contains_with_duplicates() without return types