[tune] Fix Median Stopping Rule Verbosity (#1833)

python/ray/tune/async_hyperband.py

@@ -66,15 +66,17 @@ class AsyncHyperBandScheduler(FIFOScheduler):
         self._trial_info[trial.trial_id] = self._brackets[idx]
 
     def on_trial_result(self, trial_runner, trial, result):
+        action = TrialScheduler.CONTINUE
         if getattr(result, self._time_attr) >= self._max_t:
+            action = TrialScheduler.STOP
+        else:
+            bracket = self._trial_info[trial.trial_id]
+            action = bracket.on_result(
+                trial,
+                getattr(result, self._time_attr),
+                getattr(result, self._reward_attr))
+        if action == TrialScheduler.STOP:
             self._num_stopped += 1
-            return TrialScheduler.STOP
-
-        bracket = self._trial_info[trial.trial_id]
-        action = bracket.on_result(
-            trial,
-            getattr(result, self._time_attr),
-            getattr(result, self._reward_attr))
         return action
 
     def on_trial_complete(self, trial_runner, trial, result):

python/ray/tune/median_stopping_rule.py

@@ -28,11 +28,14 @@ class MedianStoppingRule(FIFOScheduler):
         hard_stop (bool): If False, pauses trials instead of stopping
             them. When all other trials are complete, paused trials will be
             resumed and allowed to run FIFO.
+        verbose (bool): If True, will output the median and best result each
+            time a trial reports. Defaults to True.
     """
 
     def __init__(
             self, time_attr="time_total_s", reward_attr="episode_reward_mean",
-            grace_period=60.0, min_samples_required=3, hard_stop=True):
+            grace_period=60.0, min_samples_required=3,
+            hard_stop=True, verbose=True):
         FIFOScheduler.__init__(self)
         self._stopped_trials = set()
         self._completed_trials = set()
@@ -42,6 +45,7 @@ class MedianStoppingRule(FIFOScheduler):
         self._reward_attr = reward_attr
         self._time_attr = time_attr
         self._hard_stop = hard_stop
+        self._verbose = verbose
 
     def on_trial_result(self, trial_runner, trial, result):
         """Callback for early stopping.
@@ -59,10 +63,12 @@ class MedianStoppingRule(FIFOScheduler):
         self._results[trial].append(result)
         median_result = self._get_median_result(time)
         best_result = self._best_result(trial)
-        print("Trial {} best res={} vs median res={} at t={}".format(
-            trial, best_result, median_result, time))
+        if self._verbose:
+            print("Trial {} best res={} vs median res={} at t={}".format(
+                trial, best_result, median_result, time))
         if best_result < median_result and time > self._grace_period:
-            print("MedianStoppingRule: early stopping {}".format(trial))
+            if self._verbose:
+                print("MedianStoppingRule: early stopping {}".format(trial))
             self._stopped_trials.add(trial)
             if self._hard_stop:
                 return TrialScheduler.STOP