code: def forward(self, input):
      # Backwards compat for Ray data strict mode.
      if isinstance(input, dict) and len(input) == 1:
          input = list(input.values())[0]
      return self.linear(input)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from torch.utils.data import DataLoader
  from torchmetrics import Accuracy
  from ray import train
  from ray.train.lightning._lightning_utils import import_lightning
label_desc: Use image node_id 2 for calling the LinearModule obj's underlying member method code with example usage: obj.forward(input) and returns: self