1、导入模块
1 import tensorflow as tf
2 from tensorflow import keras #keras是深度集成的一个包
3 from tensorflow.keras import datasets #keras提供的可以管理数据集的一个工具，不需要人为的下载数据集
2、数据加载
datasets是一个管理数据的工具，如果在检测到系统内没有mnist数据集，它会自动的进行下载
(x,y), _ = datasets.mnist.load_data()
输出：
Downloading data from https://storage.googleapis.com/tensorflow/tf-keras-datasets/mnist.npz 8192/11490434 [..............................] - ETA: 0s 32768/11490434 [..............................] - ETA: 22s 73728/11490434 [..............................] - ETA: 18s 147456/11490434 [..............................] - ETA: 12s 278528/11490434 [..............................] - ETA: 8s 425984/11490434 [>.............................] - ETA: 7s 802816/11490434 [=>............................] - ETA: 4s 1409024/11490434 [==>...........................] - ETA: 2s 2260992/11490434 [====>.........................] - ETA: 1s 3047424/11490434 [======>.......................] - ETA: 1s 3506176/11490434 [========>.....................] - ETA: 1s 4276224/11490434 [==========>...................] - ETA: 1s 5496832/11490434 [=============>................] - ETA: 0s 6160384/11490434 [===============>..............] - ETA: 0s 6971392/11490434 [=================>............] - ETA: 0s 7012352/11490434 [=================>............] - ETA: 0s 7176192/11490434 [=================>............] - ETA: 0s 8273920/11490434 [====================>.........] - ETA: 0s 9601024/11490434 [========================>.....] - ETA: 0s 10207232/11490434 [=========================>....] - ETA: 0s 10764288/11490434 [===========================>..] - ETA: 0s 10944512/11490434 [===========================>..] - ETA: 0s 11493376/11490434 [==============================] - 1s 0us/step
原文：https://www.cnblogs.com/pengzhonglian/p/11911938.html