How to use the gokart.target.make_target function in gokart

def test_save_pandas_series(self):
        obj = pd.Series(data=[1, 2], name='column_name')
        file_path = os.path.join(_get_temporary_directory(), 'test.csv')

        target = make_target(file_path=file_path, unique_id=None)
        target.dump(obj)
        loaded = target.load()

        pd.testing.assert_series_equal(loaded['column_name'], obj)

def test_last_modified_time(self):
        conn = boto3.resource('s3', region_name='us-east-1')
        conn.create_bucket(Bucket='test')

        obj = 1
        file_path = os.path.join('s3://test/', 'test.pkl')

        target = make_target(file_path=file_path, unique_id=None)
        target.dump(obj)
        t = target.last_modification_time()
        self.assertIsInstance(t, datetime)

def test_save_and_load_gzip(self):
        obj = 1
        file_path = os.path.join(_get_temporary_directory(), 'test.gz')

        target = make_target(file_path=file_path, unique_id=None)
        target.dump(obj)
        loaded = target.load()

        self.assertEqual(loaded, [str(obj)], msg='should save an object as List[str].')

def test_save_and_load_csv(self):
        obj = pd.DataFrame(dict(a=[1, 2], b=[3, 4]))
        file_path = os.path.join(_get_temporary_directory(), 'test.csv')

        target = make_target(file_path=file_path, unique_id=None)
        target.dump(obj)
        loaded = target.load()

        pd.testing.assert_frame_equal(loaded, obj)

def _load_function(path):
        return make_target(file_path=path).load()