RuntimeError: expected scalar type Int but found Float

I tried to run the following code:

class ResBlock(nn.Module):
    def __init__(self, in_channel, out_channel):
        super(ResBlock, self).__init__() = nn.BatchNorm2d(in_channel)
        self.relu = nn.ReLU(inplace=True)
        self.conv = nn.Conv2d(in_channels=in_channel, out_channels=out_channel, kernel_size=3, stride=1)

    def forward(self, x):
        identity = x
        out =
        out = self.relu(out)
        out = self.relu(self.conv(out))
        out += identity
        return out

class Net(nn.Module):
    def __init__(self, h, w):
        self.h = h
        self.w = w

        self.conv1 = nn.Conv2d(in_channels=1, out_channels=32, kernel_size=2, stride=1)
        self.res1 = ResBlock(in_channel=16, out_channel=32)
        self.res2 = ResBlock(in_channel=32, out_channel=64)
        self.fc1 = nn.Linear(64*w*h, 4*w*h-2*w-2*h)
        self.fc2 = nn.Linear(4*w*h-2*w-2*h, 2*w*h-w-h)

    def forward(self, x):
        x = x.unsqueeze(0)
        x = x.unsqueeze(0)
        out = F.relu(self.conv1(x))
        out = self.res1(out)
        out = self.res2(out)
        out = out.view(-1, 64*self.w*self.h)

        return out

net = Net(3, 3)
a = torch.tensor([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
out = net(a)

but got the following error:

If I change the last line to:

out = net(

I will get the following error:

Any help will be appreciated!

PyTorch parameters are created as float32 tensors by default and expect the input to have the same type.
Use net(a.float()) to create a FloatTensor and it should work.

1 Like

Thank you so much!. It solves the problem.