深度学习入门-第3章-神经网络

学习这一章，需要一个0-9的训练数据，一直下载失败。

MNIST handwritten digit database, Yann LeCun, Corinna Cortes and Chris Burges

搜索了原因：

vision/torchvision/datasets/mnist.py at ddad38f3a84d4d87cbb389bc78e245920fe86f82 · pytorch/vision · GitHub

似乎是说错误太多，不让下载了，新的地址：

from torchvision import datasets, transforms

datasets.MNIST.resources = [

('https://ossci-datasets.s3.amazonaws.com/mnist/train-images-idx3-ubyte.gz', 'f68b3c2dcbeaaa9fbdd348bbdeb94873'),

('https://ossci-datasets.s3.amazonaws.com/mnist/train-labels-idx1-ubyte.gz', 'd53e105ee54ea40749a09fcbcd1e9432'),

('https://ossci-datasets.s3.amazonaws.com/mnist/t10k-images-idx3-ubyte.gz', '9fb629c4189551a2d022fa330f9573f3'),

('https://ossci-datasets.s3.amazonaws.com/mnist/t10k-labels-idx1-ubyte.gz', 'ec29112dd5afa0611ce80d1b7f02629c')

]

这几个地址试试可以下载。