def test_change_list_clear(self):
        changed = self._assign_list_test_helper('alice bob', '')
        self.assertEqual(changed, '')

    # Add / remove list items
Function that can be curried to provide the source accessor or DB
dataset/ETHPy150Open edgewall/trac/trac/ticket/tests/batch.py/BatchModifyTestCase.test_change_list_clear--crossover with--dataset/ETHPy150Open django/django/django/db/models/fields/related.py/ManyToManyField._get_m2m_attr