code: def __init__(self, **kwargs):
      super().__init__(**kwargs)
      self.cer_metric = tf.keras.metrics.Mean(name="CER")
  
file_path: calamari/calamari_ocr/ocr/model/model.py
imports: from typing import Dict, List, Tuple
  import Levenshtein
  import bidi.algorithm
  import tensorflow
  from tensorflow.python.ops import math_ops
  from tfaip import Sample
  from tfaip.model.modelbase import ModelBase
  from calamari_ocr.ocr.model.params import ModelParams
label_desc: Use image node_id 1 to create a new Model object from inherited base classes: ModelBase with example: obj = Model()