code: def test_multiindex_at_get_one_level(self):
      # GH#38053
      s2 = Series((0, 1), index=[[False, True]])
      result = s2.at[False]
      assert result == 0
  
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 3 for calling the TestMultiIndexScalar obj's underlying member method code with example usage: obj.test_multiindex_at_get_one_level() without return types