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, downlo