code: def __new__(cls):
      if cls.singleton is None:
          cls.singleton = super().__new__(cls)
      return cls.singleton
  
imports: from datetime import datetime
  import importlib
  import logging
  import numpy
  import tensorflow
  from tensorforce import TensorforceError
label_desc: Use image node_id 1 for calling the NullContext obj's underlying member method code with example usage: obj.__new__(cls) and returns: cls