class_docstr: Represent and manage a single run of an experiment.
class_docstr_tok: ["Represent","and","manage","a","single","run","of","an","experiment","."]
code: def _start_heartbeat(self):
      self.run_logger.debug("Starting Heartbeat")
      if self.beat_interval > 0:
          (
              self._stop_heartbeat_event,
              self._heartbeat,
          ) = IntervalTimer.create(
              self._emit_heartbeat, self.beat_interval
          )
          self._heartbeat.start()
  
imports: import datetime
  import os.path
  import sys
  import traceback
  from sacred import metrics_logger, SETTINGS
  from sacred.metrics_logger import linearize_metrics
  from sacred.randomness import set_global_seed
  from sacred.utils import SacredInterrupt, join_paths, IntervalTimer
  from sacred.stdout_capturing import get_stdcapturer
label_desc: Use image node_id 7 for calling the Run obj's underlying member method code with example usage: obj._start_heartbeat() without return types