def test_handling_of_None(self):
        t = self._TestString()

        try:
            t.a = None
        except __HOLE__:
            pass
        else:
           raise AssertionError

        t.b = None

        assert t.c is None
dataset/ETHPy150Open ioam/param/tests/testparameterizedobject.py/TestStringParameter.test_handling_of_None