code: def __init__(self, **kwargs: str | int | float | dict | list) -> None:
      # Arguments must be json serializable
      self.kwargs = kwargs
  
file_path: SMAC3/smac/callback/metadata_callback.py
imports: from __future__ import annotations
  import json
  import platform
  from datetime import datetime
  import smac
  from smac.callback.callback import Callback
  from smac.main.smbo import SMBO
label_desc: Use image node_id 1 to create a new MetadataCallback object from inherited base classes: Callback with example: obj = MetadataCallback()