code: def test_ewm_with_times_getitem(halflife_with_times):
      # GH 40164
      halflife = halflife_with_times
      data = np.arange(10.0)
      data[::2] = np.nan
      times = date_range("2000", freq="D", periods=10)
      df = DataFrame({"A": data, "B": data})
      result = df.ewm(halflife=halflife, times=times)["A"].mean()
      expected = df.ewm(halflife=1.0)["A"].mean()
      tm.assert_series_equal(result, expected)
  
imports: import numpy
  import pytest
  from pandas import DataFrame, DatetimeIndex, Series, date_range
  import pandas._testing
label_desc: Use image node_id 10 for calling a global function with example usage: test_ewm_with_times_getitem(halflife_with_times) without return types