class_docstr: Container holding a list of callbacks.
code: def __init__(self, callbacks=None, queue_length=10):
      self.initial_epoch = -1
      self.final_epoch = -1
      self.has_val_data = False
      self.callbacks = callbacks or []
      self.queue_length = queue_length
  
file_path: pywick/pywick/callbacks/CallbackContainer.py
imports: import time
  import datetime
label_desc: Use image node_id 1 to create a new CallbackContainer object  with example: obj = CallbackContainer(callbacks, queue_length)