code: def query_trial(request):
      
      trial_id = request.GET.get("trial_id")
      trials = TrialRecord.objects \
          .filter(trial_id=trial_id) \
          .order_by("-start_time")
      if len(trials) == 0:
          resp = "Unkonwn trial id %s.\n" % trials
      else:
          trial = trials[0]
          result = {
              "trial_id": trial.trial_id,
              "job_id": trial.job_id,
              "trial_status": trial.trial_status,
              "start_time": trial.start_time,
              "end_time": trial.end_time,
              "params": trial.params
          }
          resp = json.dumps(result)
      return HttpResponse(resp, content_type="application/json;charset=utf-8")
docs: Rest API to query the trial info, with the given trial_id.
  
      The url pattern should be like this:
  
      curl http://<server>:<port>/query_trial?trial_id=<trial_id>
  
      The response may be:
  
      {
          "app_url": "None",
          "trial_status": "TERMINATED",
          "params": {'a': 1, 'b': 2},
          "job_id": "asynchyperband_test",
          "end_time": "2018-07-19 20:49:44",
          "start_time": "2018-07-19 20:49:40",
          "trial_id": "2067R2ZD",
      }