for epoch in range(num_epochs):
for i ,(images, labels) in enumerate(train_data):
# Run the forward pass
images = images.unsqueeze(1).float()
outputs = model(images)
loss = criterion(outputs, labels)
loss_list.append(loss.item())
# Backprop and perform Adam optimisation
optimizer.zero_grad()
loss.backward()
optimizer.step()
#optimizer update the weight parameters to minimize the loss function
# Track the accuracy
total = labels.size(0)
_, predicted = torch.max(outputs.data, 1)
correct = (predicted == labels).sum().item()
acc_list.append(correct / total)
if (i + 1) % 35 == 0:
print('Epoch [{}/{}], Step [{}/{}], Loss: {:.4f}, Accuracy: {:.2f}%'
.format(epoch + 1, num_epochs, i + 1, total_step, loss.item(),
(correct / total) * 100))