code: def test_truthiness():
      msg = "boolean value of NA is ambiguous"
  
      with pytest.raises(TypeError, match=msg):
          bool(NA)
  
      with pytest.raises(TypeError, match=msg):
          not NA
  
imports: from datetime import date, time, timedelta
  import pickle
  import numpy
  import pytest
  from pandas._libs.missing import NA
  from pandas.core.dtypes.common import is_scalar
  import pandas
  import pandas._testing
label_desc: Use image node_id 4 for calling a global function with example usage: test_truthiness() without return types