87 lines
3.0 KiB
Python
87 lines
3.0 KiB
Python
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# Copyright 2015 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""MNIST handwritten digits dataset."""
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import numpy as np
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from keras.utils.data_utils import get_file
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# isort: off
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from tensorflow.python.util.tf_export import keras_export
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@keras_export("keras.datasets.mnist.load_data")
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def load_data(path="mnist.npz"):
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"""Loads the MNIST dataset.
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This is a dataset of 60,000 28x28 grayscale images of the 10 digits,
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along with a test set of 10,000 images.
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More info can be found at the
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[MNIST homepage](http://yann.lecun.com/exdb/mnist/).
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Args:
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path: path where to cache the dataset locally
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(relative to `~/.keras/datasets`).
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Returns:
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Tuple of NumPy arrays: `(x_train, y_train), (x_test, y_test)`.
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**x_train**: uint8 NumPy array of grayscale image data with shapes
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`(60000, 28, 28)`, containing the training data. Pixel values range
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from 0 to 255.
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**y_train**: uint8 NumPy array of digit labels (integers in range 0-9)
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with shape `(60000,)` for the training data.
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**x_test**: uint8 NumPy array of grayscale image data with shapes
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(10000, 28, 28), containing the test data. Pixel values range
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from 0 to 255.
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**y_test**: uint8 NumPy array of digit labels (integers in range 0-9)
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with shape `(10000,)` for the test data.
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Example:
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```python
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(x_train, y_train), (x_test, y_test) = keras.datasets.mnist.load_data()
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assert x_train.shape == (60000, 28, 28)
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assert x_test.shape == (10000, 28, 28)
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assert y_train.shape == (60000,)
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assert y_test.shape == (10000,)
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```
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License:
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Yann LeCun and Corinna Cortes hold the copyright of MNIST dataset,
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which is a derivative work from original NIST datasets.
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MNIST dataset is made available under the terms of the
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[Creative Commons Attribution-Share Alike 3.0 license.](
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https://creativecommons.org/licenses/by-sa/3.0/)
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"""
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origin_folder = (
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"https://storage.googleapis.com/tensorflow/tf-keras-datasets/"
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)
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path = get_file(
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path,
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origin=origin_folder + "mnist.npz",
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file_hash=( # noqa: E501
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"731c5ac602752760c8e48fbffcf8c3b850d9dc2a2aedcf2cc48468fc17b673d1"
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),
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)
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with np.load(path, allow_pickle=True) as f:
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x_train, y_train = f["x_train"], f["y_train"]
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x_test, y_test = f["x_test"], f["y_test"]
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return (x_train, y_train), (x_test, y_test)
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