code: def start(global_step: int = 0):
      r"""
      Starts the experiment.
      Run it using ``with`` statement and it will monitor and report, experiment completion
      and exceptions.
      """
  
      return _experiment_singleton().start()
  
imports: from pathlib import Path
  from typing import Optional, Set, Dict, overload
  import numpy
  from labml.configs import BaseConfigs
  from labml.internal.experiment import create_experiment, experiment_singleton, has_experiment
  from labml.internal.experiment.experiment_run import get_configs
  from labml.internal.monitor import monitor_singleton
label_desc: Use image node_id 11 for calling a global function with example usage: start(global_step) and returns: _experiment_singleton