code: def test_is_scalar():
      assert is_scalar(NA) is True
  
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 17 for calling a global function with example usage: test_is_scalar() without return types