class_docstr: Container holding a list of callbacks.
code: def on_epoch_begin(self, epoch, logs=None):
      if self.initial_epoch == -1:
          self.initial_epoch = epoch
      logs = logs or {}
      for callback in self.callbacks:
          callback.on_epoch_begin(epoch, logs)
  
file_path: pywick/pywick/callbacks/CallbackContainer.py
imports: import time
  import datetime
label_desc: Use image node_id 5 for calling the CallbackContainer obj's underlying member method code with example usage: obj.on_epoch_begin(epoch, logs) without return types