code: def num_classes(self, __num_classes: int):
      if type(__num_classes) != int:
          raise TypeError
      if not __num_classes > 0:
          raise ValueError
      self.__num_classes = __num_classes if __num_classes > 0 else 0
  
imports: import copy
  import logging
  import typing
  import torch
  import torch.nn.functional
  from copy import deepcopy
  from autogl.module.hpo.auto_module import AutoModule
label_desc: Use image node_id 6 for calling the ClassificationModel obj's underlying member method code with example usage: obj.num_classes(__num_classes) without return types