code: def pass_rate(self, include_skips=False, include_inconclusive=False, include_retries=True):
          
          total = self.count()
          success = self.success_count()
          retries = self.retry_count()
          try:
              if include_inconclusive and include_skips and include_retries:
                  val = 100.0*success/total
              elif include_inconclusive and include_skips and not include_retries:
                  val = 100.0 * success / (total - retries)
              elif include_skips and include_retries and not include_inconclusive:
                  inconcs = self.inconclusive_count()
                  val = 100.0 * success / (total - inconcs)
              elif include_skips and not include_retries and not include_inconclusive:
                  inconcs = self.inconclusive_count()
                  val = 100.0 * success / (total - inconcs - retries)
              elif include_inconclusive and include_retries and not include_skips:
                  skipped = self.skip_count()
                  val = 100.0 * success / (total - skipped)
              elif include_inconclusive and not include_retries and not include_skips:
                  skipped = self.skip_count()
                  val = 100.0 * success / (total - skipped - retries)
              elif not include_inconclusive and not include_skips and include_retries:
                  failures = self.failure_count()
                  val = 100.0 * success / (failures + success)
              else:
                  failures = self.clean_fails()
                  val = 100.0 * success / (failures + success)
          except ZeroDivisionError:
              val = 0
          return format(val, '.2f') + " %"
docs: Calculate pass rate for tests in this list.
  
          :param include_skips: Boolean, if True skipped tc:s will be included. Default is False
          :param include_inconclusive: Boolean, if True inconclusive tc:s will be included.
          Default is False.
          :param include_retries: Boolean, if True retried tc:s will be included in percentages.
          :return: Percentage in format .2f %