class_docstr: Container abstracting a list of callbacks.
class_docstr_tok: ["Container","abstracting","a","list","of","callbacks","."]
code: def __iter__(self):
      return iter(self.callbacks)
  
imports: import collections
  import logging
  import time
  import typing
  import numpy
  from elegy.callbacks.sigint import SigInt, SigIntMode
  from .callback import Callback
  from .history import History
  from .progbar_logger import ProgbarLogger
label_desc: Use image node_id 27 for calling the CallbackList obj's underlying member method code with example usage: obj.__iter__() and returns: iter