code: def get_dm_offline(self):
          
          model_file = self.find_cached_dm()
          try:
              f = open(model_file, 'r', encoding='utf-8-sig')
          except TypeError:
              f = open(model_file, 'r')
          string = '\n'.join(f.readlines())
          f.close()
          raw = json.loads(string)
          full = pd.DataFrame(raw)
          return full
docs: Grab the 3.0 data model from the PmagPy/pmagpy directory
  
          Returns
          ---------
          full : DataFrame
              cached data model json in DataFrame format