code: def forward(self, *input_args):
      w = torch.tensor(0.5)
      b = torch.tensor(2.0)
      return torch.add(torch.multiply(w, input_args[0]), b)
  
label_desc: Use image node_id 1 for calling the HalfPlusTwoModel obj's underlying member method code with example usage: obj.forward() and returns: torch