code: def example_4_5():
      happy_wp = HappyWordPrediction()
      args = WPEvalArgs(preprocessing_processes=2)
      result = happy_wp.eval("../../data/wp/train-eval.txt", args=args)
      print(
          type(result)
      )  # <class 'happytransformer.happy_trainer.EvalResult'>
      print(result)  # EvalResult(eval_loss=0.459536075592041)
      print(result.loss)
  
imports: from happytransformer import HappyWordPrediction, WPTrainArgs, WPEvalArgs
label_desc: Use image node_id 6 for calling a global function with example usage: example_4_5() without return types