class_docstr: A Callback class that handles additional variables and methods
  manipulation that are not provided by the library.
docstr: Initialization method.
docstr_tok: ["Initialization","method","."]
code: def __init__(self):
      """Initialization method."""
  
      pass
  
imports: from typing import List, TypeVar, Union
  import numpy
  import opytimizer.utils.exception
  from opytimizer.core.space import Space
label_desc: Use image node_id 1 to create a new Callback object  with example: obj = Callback()