code: def example_7_4():
      happy_tt = HappyTextToText()
      args = TTEvalArgs(preprocessing_processes=1)
      result = happy_tt.eval(
          "../../data/tt/train-eval-grammar.csv", args=args
      )
      print(
          type(result)
      )  # <class 'happytransformer.happy_trainer.EvalResult'>
      print(result)  # EvalResult(loss=3.2277376651763916)
      print(result.loss)
  
imports: from happytransformer import HappyTextToText, TTSettings, TTTrainArgs, TTEvalArgs
label_desc: Use image node_id 5 for calling a global function with example usage: example_7_4() without return types