How to use lineflow - 10 common examples

def split_dataset_n(dataset: Dataset,
                    n: int,
                    indices: List[int] = None) -> List[SubDataset]:
    n_examples = len(dataset)
    sub_size = n_examples // n
    return [SubDataset(dataset, sub_size * i, sub_size * (i + 1), indices)
            for i in range(n)]

def split_dataset_n_random(dataset: Dataset,
                           n: int,
                           seed=None) -> List[SubDataset]:
    n_examples = len(dataset)
    sub_size = n_examples // n
    random.seed(seed)
    indices = list(range(len(dataset)))
    random.shuffle(indices)
    return [SubDataset(dataset, sub_size * i, sub_size * (i + 1), indices)
            for i in range(n)]

for i, y in enumerate(lines):
            self.assertEqual(data[i], y)

        self.assertEqual(len(data), len(lines))
        self.assertEqual(data._length, len(lines))
        # check if length is cached
        self.assertEqual(len(data), len(lines))

        self.assertIsInstance(data._dataset, easyfile.TextFile)

        data = data.map(str.split)

        for x, y in zip(data, lines):
            self.assertEqual(x, y.split())

        self.assertIsInstance(data, lineflow.core.MapDataset)
        self.assertIsInstance(data._dataset, TextDataset)

def test_raises_value_error_with_invalid_split(self):
        with self.assertRaises(ValueError):
            Squad(split='invalid_split')

def test_loads_v2_each_split(self):
        train = Squad(split='train', version=2)
        self.assertEqual(len(train), 130_319)
        dev = Squad(split='dev', version=2)
        self.assertEqual(len(dev), 11_873)

def test_loads_v1_each_split(self):
        train = Squad(split='train', version=1)
        self.assertEqual(len(train), 87_599)
        dev = Squad(split='dev', version=1)
        self.assertEqual(len(dev), 10_570)

def test_loads_v1_each_split(self):
        train = Squad(split='train', version=1)
        self.assertEqual(len(train), 87_599)
        dev = Squad(split='dev', version=1)
        self.assertEqual(len(dev), 10_570)

def test_loads_v2_each_split(self):
        train = Squad(split='train', version=2)
        self.assertEqual(len(train), 130_319)
        dev = Squad(split='dev', version=2)
        self.assertEqual(len(dev), 11_873)

def test_raises_value_error_with_invalid_split(self):
        with self.assertRaises(ValueError):
            CnnDailymail(split='invalid_split')

def test_loads_each_split(self):
        train = CnnDailymail(split='train')
        self.assertEqual(len(train), 287_227)
        dev = CnnDailymail(split='dev')
        self.assertEqual(len(dev), 13_368)
        test = CnnDailymail(split='test')
        self.assertEqual(len(test), 11_490)