old_contents: import json
  import os
  from datetime import datetime
  
  
  def start(params):
      """Capture exp start """
      exp_start = datetime.now()
      experiment_id = params['experiment_id']
  
      search_space = []
      for key, val in params.items():
          search_space.append("{}: {}".format(key, val))
  
      msg = [{
          'experiment_id': experiment_id,
          'start_time': str(exp_start),
          'search_space': search_space
      }]
      save("experiment_start.json", msg)
  
  def end(experiment_id):
      """Capture exp end """
      exp_end = datetime.now()
      msg = [{
          'experiment_id': experiment_id,
          'status': {'set': 'Finished'},
          'end_time': {'set': str(exp_end)}
      }]
      save("experiment_end.json", msg)
  
  def save(filename, msg):
      """Save log message"""
      path = os.getenv('TURBINE_OUTPUT')
      with open(path + "/" + filename, "w") as file_json:
          file_json.write(json.dumps(
              msg, indent=4, separators=(',', ': ')))
  
new_contents: import json
  import os
  from datetime import datetime
  
  
  def start(params, sys_desc):
      """Capture exp start """
      exp_start = datetime.now()
      experiment_id = params['experiment_id']
  
      search_space = []
      for key, val in params.items():
          search_space.append("{}: {}".format(key, val))
  
      msg = [{
          'experiment_id': experiment_id,
          'start_time': str(exp_start),
          'system_description': sys_desc,
          'search_space': search_space
      }]
      save("experiment_start.json", msg)
  
  def end(experiment_id):
      """Capture exp end """
      exp_end = datetime.now()
      msg = [{
          'experiment_id': experiment_id,
          'status': {'set': 'Finished'},
          'end_time': {'set': str(exp_end)}
      }]
      save("experiment_end.json", msg)
  
  def save(filename, msg):
      """Save log message"""
      path = os.getenv('TURBINE_OUTPUT')
      with open(path + "/" + filename, "w") as file_json:
          file_json.write(json.dumps(
              msg, indent=4, separators=(',', ': ')))
  
subject: add system description in json