code: def forward(self, img):
      out_1 = self.conv(img)
      out_1 = out_1.view(img.size(0), -1)
      out_2 = self.fc(out_1)
      return out_2
  
imports: import torch
  from torch import nn
  from torchvision.models import vgg19
  from torch.autograd import Variable
label_desc: Use image node_id 2 for calling the Discriminator obj's underlying member method code with example usage: obj.forward(img) and returns: out_2