code: def test_wp_train_default():
      happy_wp.train(
          "../data/wp/train-eval.txt", args=WPTrainArgs(max_length=512)
      )
  
imports: from pytest import approx
  from happytransformer import HappyWordPrediction, WPTrainArgs, WPEvalArgs
  from happytransformer.happy_word_prediction import WordPredictionResult
  from tests.run_save_load import run_save_load
  import pytest
  from tests import happy_wp
label_desc: Use image node_id 5 for calling a global function with example usage: test_wp_train_default() without return types