莫烦PyTorch学习笔记(五)——模型的存取

import torch

from torch.autograd import Variable

import matplotlib.pyplot as plt

torch.manual_seed()

# fake data

x = torch.unsqueeze(torch.linspace(-,,),dim=)

y = x.pow() + 0.2 * torch.rand(x.size())

x, y = Variable(x,requires_grad=False), Variable(y,requires_grad=False)

def save():

    net1 = torch.nn.Sequential(

        torch.nn.Linear(, ),

        torch.nn.ReLU(),

        torch.nn.Linear(, )

    )

    optimizer = torch.optim.SGD(net1.parameters(), lr=0.5)

    loss_func = torch.nn.MSELoss()

    for t in range():

        prediction = net1(x)

        loss = loss_func(prediction, y)

        optimizer.zero_grad()

        loss.backward()

        optimizer.step()

    plt.figure(,figsize=(,))

    plt.subplot()

    plt.title('Net1')

    plt.scatter(x.data.numpy(),y.data.numpy())

    plt.plot(x.data.numpy(), prediction.data.numpy(),'r-',lw=)

    torch.save(net1, 'net.pkl')  # 保存整个网络，包括整个计算图

    torch.save(net1.state_dict(), 'net_params.pkl')  # 只保存网络中的参数 (速度快, 占内存少)

def restore_net():

    net2 = torch.load('net.pkl')

    prediction = net2(x)

    plt.subplot()

    plt.title('Net2')

    plt.scatter(x.data.numpy(),y.data.numpy())

    plt.plot(x.data.numpy(), prediction.data.numpy(),'r-',lw=)

def restore_params():

    net3 = torch.nn.Sequential(

        torch.nn.Linear(, ),

        torch.nn.ReLU(),

        torch.nn.Linear(, )

    )

    net3.load_state_dict(torch.load('net_params.pkl'))

    prediction = net3(x)

    plt.subplot()

    plt.title('Net3')

    plt.scatter(x.data.numpy(), y.data.numpy())

    plt.plot(x.data.numpy(), prediction.data.numpy(), 'r-', lw=)

    # 将保存的参数复制到 net3

    plt.show()

save()

restore_net()

restore_params()

结果和莫烦的不一样，但是找不到问题的所在，，。。。