code: def __new__(cls, *args, **kwargs):
      if cls._instance is None:
          cls._instance = object.__new__(cls, *args, **kwargs)
      return cls._instance
  
imports: from typing import Optional
label_desc: Use image node_id 1 for calling the TensorParallelEnv obj's underlying member method code with example usage: obj.__new__(cls) and returns: cls