code: def __init__(self):
      self.cumulative_acc = 0.0
      self.num_examples = 0.0
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import logging
  from math import ceil
  import numpy
  import six
  import turicreate
  import turicreate.toolkits._internal_utils
  from turicreate.toolkits._main import ToolkitError
  from turicreate.toolkits._model import CustomModel
  from turicreate.toolkits._model import PythonProxy
  from turicreate.toolkits import _coreml_utils
  from turicreate._deps.minimal_package import _minimal_package_import_check
label_desc: Use image node_id 1 to create a new _NumPyAccuracy object from inherited base classes: _Accuracy with example: obj = _NumPyAccuracy()