summary does not work with the torch.device class

[Skaifai]

Pytorch summary does not work with the torch.device class. Code to reproduce the error.

import torch
import torch.nn as nn
from torchvision import models
from torchsummary import summary

device = torch.device("cuda") if torch.cuda.is_available() else torch.device("cpu")
print("Using ", device)

class CNN(nn.Module):
    def __init__(self, train_CNN=False, num_classes=2):
        super().__init__()
        self.conv1 = nn.Conv2d(3, 6, 5)
        self.pool = nn.MaxPool2d(2, 2)
        self.conv2 = nn.Conv2d(6, 16, 5)
        self.fc1 = nn.Linear(16 * 5 * 5, 120)
        self.fc2 = nn.Linear(120, 84)
        self.fc3 = nn.Linear(84, 10)

    def forward(self, x):
        x = self.pool(F.relu(self.conv1(x)))
        x = self.pool(F.relu(self.conv2(x)))
        x = torch.flatten(x, 1) # flatten all dimensions except batch
        x = F.relu(self.fc1(x))
        x = F.relu(self.fc2(x))
        x = self.fc3(x)
        return x

model = CNN().to(device)
summary(model, (3, 28, 28), device=device)

Error message:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_17928\2345870344.py in <module>
     27 
     28 model = CNN().to(device)
---> 29 summary(model, (3, 28, 28), device=device)

~\anaconda3\lib\site-packages\torchsummary\torchsummary.py in summary(model, input_size, batch_size, device)
     42             hooks.append(module.register_forward_hook(hook))
     43 
---> 44     device = device.lower()
     45     assert device in [
     46         "cuda",

AttributeError: 'torch.device' object has no attribute 'lower'