mnist数据集官网压缩包 解决下载过慢问题

└── MNIST ├── processed │   ├── test.pt │   └── training.pt └── raw ├── t10k-images-idx3-ubyte ├── t10k-labels-idx1-ubyte ├── train-images-idx3-ubyte └── train-labels-idx1-ubyte 将压缩包放在mnist/row，文件夹下运行train_set = mnist.MNIST('./data', train=True, download=True)即可解压，之后改为false即可调用