code: def __init__(
      self,
      interval: Optional[int],
      aggregator: Aggregator,
      observe_epoch_end: bool = True,
  ):
      self.key = aggregator.key
      obs_keys = ["epoch_end"] if observe_epoch_end else []
      obs_keys.append(self.key)
      super().__init__(observing_keys=obs_keys)
      self.iteration = 0
      self.interval = interval
      self.intermediate_values: List[Any] = []
      self.aggregator = aggregator
  
imports: import logging
  from typing import Any, Dict, Iterable, List, Optional
  from reagent.core.tensorboardX import SummaryWriterContext
  from reagent.core.tracker import Aggregator, Observer
label_desc: Use image node_id 1 to create a new IntervalAggregatingObserver object from inherited base classes: Observer with example: obj = IntervalAggregatingObserver(interval, aggregator, observe_epoch_end)