[人工智能]pytorch-LeNet-model

import torch.nn as nn
import torch.nn.functional as F

class LeNet(nn.Module):
    def __init__(self):
        super(LeNet, self).__init__()
        self.conv1 = nn.Conv2d(3, 16, 5)
        self.pool1 = nn.MaxPool2d(2, 2)
        self.conv2 = nn.Conv2d(16, 32, 5)
        self.pool2 = nn.MaxPool2d(2, 2)
        self.fc1 = nn.Linear(32 * 5 * 5, 120)
        self.fc2 = nn.Linear(120, 84)
        self.fc3 = nn.Linear(84, 10)
    def forward(self, x):
        x = self.conv1(x)
        x = F.relu(x)
        x = self.pool1(x)
        x = self.conv2(x)
        x = F.relu(x)
        x = self.pool2(x)
        x = x.view(-1, 32*5*5)
        x = F.relu(self.fc1(x))
        x = F.relu(self.fc2(x))
        x = self.fc3(x)
        return x


# train
net = LeNet()
loss_function = nn.CrossEntropyLoss()
optimize = optim.Adam(net.parameters(), lr=0.01)
optimize.zero_grad()
outputs = net(inputs)
loss = loss_function(outputs, labels)
loss.backward()
optimize.step()

# predict
net = LeNet()
net.load_state_dict(torch.load('lenet.pth'))
with torch.no_grad():
    outputs = net(inputs)