def _paths_key_exists(self, obj, old_key):
        try:
            obj.paths[old_key]
        except __HOLE__:
            self.fail('Old key does not exist anymore: {0}'.format(old_key))
dataset/ETHPy150Open koenbok/Cactus/cactus/tests/test_compat.py/TestCompatibility._paths_key_exists