can't run model

This is my class
class absen_models():
      def __init__(self, model_file, scaler_file):
          #open model and scaler that i save
          with open('absen_model', 'rb') as model_file, open('absen_scaler', 'rb') as scaler_file:
                self.reg = pickle.load(model_file)
                self.scaler = pickle.load(scaler_file)
                self.data = None

I can't running my class on
model = absen_models('absen_model', 'absen_scaler')

What should i do?