code: def __init__(self, num_classes, class_weight=None):
      self.num_classes = num_classes
      self.class_weight = class_weight
      super().__init__()
  
imports: import unittest
  import pytest
  import torch
  import numpy
  from small_text.integrations.pytorch.exceptions import PytorchNotFoundError
label_desc: Use image node_id 1 to create a new PytorchClassifierImplementation object from inherited base classes: PytorchClassifier with example: obj = PytorchClassifierImplementation(num_classes, class_weight)