code: def activate_train_mode_for_dropout_layers(
      model: Callable,
  ) -> Callable:
      model.eval()  # type: ignore
      n_dropout_layers = 0
      for module in model.modules():  # type: ignore
          if isinstance(module, nn.Dropout):
              module.train()
              n_dropout_layers += 1
      if n_dropout_layers == 0:
          raise ValueError("No dropout layers identified.")
  
      return model
  
label_desc: Use image node_id 1 for calling a global function with example usage: activate_train_mode_for_dropout_layers(model) and returns: model