code: def test_at_iat_coercion(self):
      # as timestamp is not a tuple!
      dates = date_range("1/1/2000", periods=8)
      df = DataFrame(
          np.random.default_rng(2).standard_normal((8, 4)),
          index=dates,
          columns=["A", "B", "C", "D"],
      )
      s = df["A"]
  
      result = s.at[dates[5]]
      xp = s.values[5]
      assert result == xp
  
imports: from datetime import datetime, timedelta
  import itertools
  import numpy
  import pytest
  from pandas import DataFrame, Index, Series, Timedelta, Timestamp, date_range
  import pandas._testing
label_desc: Use image node_id 2 for calling the TestAtAndiAT obj's underlying member method code with example usage: obj.test_at_iat_coercion() without return types