code: def init_tfidf_model(model_path, force_reload=False):
      # Load model once at runtime
      global TFIDF_MODEL
      if TFIDF_MODEL and not force_reload:
          return TFIDF_MODEL
  
      tfidf_model = nmws.TfIdf()
      tfidf_model.read(model_path)
      TFIDF_MODEL = tfidf_model
  
      return tfidf_model
  
file_path: nlpaug/nlpaug/augmenter/word/tfidf.py
imports: from nlpaug.augmenter.word import WordAugmenter
  from nlpaug.util import Action, Doc, WarningException, WarningName, WarningCode, WarningMessage
  import nlpaug.model.word_stats
label_desc: Use image node_id 1 for calling a global function with example usage: init_tfidf_model(model_path, force_reload) and returns: tfidf_model, TFIDF_MODEL