class_docstr: IOBase
class_docstr_tok: ["IOBase"]
code: def __init_subclass__(cls, *, io_type: IOType, **kwargs):
      super().__init_subclass__(**kwargs)
      cls._data_type = io_type
  
file_path: towhee/towhee/serve/io/base.py
imports: from typing import Any
  from abc import ABC, abstractmethod
  from enum import Enum, auto
label_desc: Use image node_id 1 for calling the IOBase obj's underlying member method code with example usage: obj.__init_subclass__(cls) without return types