old_contents: import time
  import json
  
  
  class Results(object):
      def __init__(self, results_file_name, run_time):
          self.results_file_name = results_file_name
          self.run_time = run_time
          self.total_transactions = 0
          self.total_errors = 0
          self.uniq_timer_names = set()
          self.uniq_user_group_names = set()
  
          self.resp_stats_list = self.__parse_file()
  
          self.epoch_start = self.resp_stats_list[0].epoch_secs
          self.epoch_finish = self.resp_stats_list[-1].epoch_secs
          self.start_datetime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(self.epoch_start))
          self.finish_datetime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(self.epoch_finish))
  
      def __parse_file(self):
          with open(self.results_file_name, 'r') as f:
              datas = json.load(f)
          resp_stats_list = []
          for item in datas:
              if item['error']:
                  self.total_errors += 1
              self.total_transactions += 1
              for name, value in item['custom_timers'].iteritems():
                  self.uniq_timer_names.add(name)
              r = ResponseStats(item['elapsed'], item['epoch'], item['turret_name'], item['scriptrun_time'],
                                item['error'], item['custom_timers'])
              resp_stats_list.append(r)
  
          return resp_stats_list
  
  
  class ResponseStats(object):
      def __init__(self, elapsed_time, epoch_secs, user_group_name, trans_time, error, custom_timers):
          self.elapsed_time = elapsed_time
          self.epoch_secs = epoch_secs
          self.user_group_name = user_group_name
          self.trans_time = trans_time
          self.error = error
          self.custom_timers = custom_timers
  
new_contents: import six
  import time
  import json
  
  
  class Results(object):
      def __init__(self, results_file_name, run_time):
          self.results_file_name = results_file_name
          self.run_time = run_time
          self.total_transactions = 0
          self.total_errors = 0
          self.uniq_timer_names = set()
          self.uniq_user_group_names = set()
  
          self.resp_stats_list = self.__parse_file()
  
          self.epoch_start = self.resp_stats_list[0].epoch_secs
          self.epoch_finish = self.resp_stats_list[-1].epoch_secs
          self.start_datetime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(self.epoch_start))
          self.finish_datetime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(self.epoch_finish))
  
      def __parse_file(self):
          with open(self.results_file_name, 'r') as f:
              datas = json.load(f)
          resp_stats_list = []
          for item in datas:
              if item['error']:
                  self.total_errors += 1
              self.total_transactions += 1
              for name, value in six.iteritems(item['custom_timers']):
                  self.uniq_timer_names.add(name)
              r = ResponseStats(item['elapsed'], item['epoch'], item['turret_name'], item['scriptrun_time'],
                                item['error'], item['custom_timers'])
              resp_stats_list.append(r)
  
          return resp_stats_list
  
  
  class ResponseStats(object):
      def __init__(self, elapsed_time, epoch_secs, user_group_name, trans_time, error, custom_timers):
          self.elapsed_time = elapsed_time
          self.epoch_secs = epoch_secs
          self.user_group_name = user_group_name
          self.trans_time = trans_time
          self.error = error
          self.custom_timers = custom_timers
  
subject: fix a bug for python 3 in results