#import
import sys
import d2lzh_pytorch as d2l
import torch
import torch.nn as nn
import torch.optim as optim
import time
#net
class Flatten(torch.nn.Module): #展平操作
def forward(self, x):
return x.view(x.shape[0], -1)
class Reshape(torch.nn.Module): #将图像大小重定型
def forward(self, x):
