code: def __init__(self):
      self.backend = None
      self.model = None
      self.params = {}
      self.predictions = None
      self.n_classes = None
  
imports: from abc import ABC, abstractmethod
  import numpy
  from benchmarks.timer import Timer
  from benchmarks.datasets import LearningTask
  from hummingbird.ml import constants
  from hummingbird.ml import convert, convert_batch
label_desc: Use image node_id 2 to create a new ScoreBackend object from inherited base classes: ABC with example: obj = ScoreBackend()