code: def forward(self, x):
      x = x.view(x.size(0), -1)
      return self.encoder(x)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  import torchvision.models
label_desc: Use image node_id 2 for calling the MNIST_MLP obj's underlying member method code with example usage: obj.forward(x) and returns: self