class ResBlock(nn.Module):
    def __init__(self, inplanes=128, planes=128, stride=1, downsample=None):
        super(ResBlock, self).__init__()
        self.conv1 = nn.Conv2d(inplanes, planes, kernel_size=3, stride=stride,
                     padding=1, bias=False)
        self.bn1 = nn.BatchNorm2d(planes)
        self.conv2 = nn.Conv2d(planes, planes, kernel_size=3, stride=stride,
                     padding=1, bias=False)
        self.bn2 = nn.BatchNorm2d(planes)

    def forward(self, x):
        residual = x
        out = F.relu(self.bn1(self.conv1(x)))
        out = self.bn2(self.conv2(out))
        out += residual
        out = F.relu(out)
        return out