class_docstr: Container abstracting a list of callbacks.
class_docstr_tok: ["Container","abstracting","a","list","of","callbacks","."]
code: def _reset_batch_timing(self):
      self._delta_t_batch = 0.0
      self._delta_ts = collections.defaultdict(
          lambda: collections.deque([], maxlen=self._queue_length)
      )
  
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 3 for calling the CallbackList obj's underlying member method code with example usage: obj._reset_batch_timing() without return types