class_docstr: Container abstracting a list of callbacks.
class_docstr_tok: ["Container","abstracting","a","list","of","callbacks","."]
code: def on_train_end(self, logs=None):
      logs = logs or {}
      for callback in self.callbacks:
          callback.on_train_end(logs)
  
imports: import tree
  from keras.api_export import keras_export
  from keras.callbacks.callback import Callback
  from keras.callbacks.history import History
  from keras.callbacks.progbar_logger import ProgbarLogger
label_desc: Use image node_id 17 for calling the CallbackList obj's underlying member method code with example usage: obj.on_train_end(logs) without return types