code: def __init__(self, venv):
      VecNormalize.__init__(self, venv)
      self.var_b = "b"
  
imports: import collections
  import functools
  import itertools
  import multiprocessing
  import pytest
  import gym
  import numpy
  from stable_baselines.common.vec_env import DummyVecEnv, SubprocVecEnv, VecNormalize, VecFrameStack
label_desc: Use image node_id 1 to create a new CustomWrapperB object from inherited base classes: VecNormalize with example: obj = CustomWrapperB(venv)