#实例化模型、优化器、损失函数

model = MnistModel().to(config.device)

optimizer = optim.Adam(model.parameters(),lr=0.01)

if os.path.exists("./model/mnist_net.pt"):

    model.load_state_dict(torch.load("./model/mnist_net.pt"))

    optimizer.load_state_dict(torch.load("model/mnist_optimizer.pt"))

            torch.save(model.state_dict(),"model/mnist_net.pt")

            torch.save(optimizer.state_dict(),"model/mnist_optimizer.pt")