class_docstr: NFM replace the fm part as a mlp to model the feature interaction.
class_docstr_tok: ["NFM","replace","the","fm","part","as","a","mlp","to","model","the","feature","interaction","."]
code: def calculate_loss(self, interaction):
      label = interaction[self.LABEL]
      output = self.forward(interaction)
      return self.loss(output, label)
  
file_path: RecBole/recbole/model/context_aware_recommender/nfm.py
imports: import torch.nn
  from torch.nn.init import xavier_normal_, constant_
  from recbole.model.abstract_recommender import ContextRecommender
  from recbole.model.layers import BaseFactorizationMachine, MLPLayers
label_desc: Use image node_id 4 for calling the NFM obj's underlying member method code with example usage: obj.calculate_loss(interaction) and returns: self