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30 lines
947 B
Python
30 lines
947 B
Python
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import tensorflow as tf
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import boilerplate as tfbp
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@tfbp.default_export
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class MNIST(tfbp.DataLoader):
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default_hparams = {"batch_size": 32}
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def __call__(self):
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train_data, test_data = tf.keras.datasets.mnist.load_data()
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test_data = tf.data.Dataset.from_tensor_slices(test_data)
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if self.method in ["fit", "train"]:
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train_data = tf.data.Dataset.from_tensor_slices(train_data).shuffle(10000)
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test_data = test_data.shuffle(10000)
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train_data = self._transform_dataset(train_data)
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return train_data, test_data
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return self._transform_dataset(test_data)
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def _transform_dataset(self, dataset):
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dataset = dataset.batch(self.hparams.batch_size)
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return dataset.map(
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lambda x, y: (
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tf.reshape(tf.cast(x, tf.float32) / 255.0, [-1, 28 * 28]), # type: ignore
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tf.cast(y, tf.int64),
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)
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)
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