Merge branch 'OpenNMT-master'

Author: Raghavendra Sugeeth P S

onmt/inputters/image_dataset.py

@@ -75,7 +75,8 @@ def read(self, images, side, img_dir=None):
                 img = transforms.ToTensor()(
                     Image.fromarray(cv2.imread(img_path, 0)))
             else:
-                img = transforms.ToTensor()(Image.open(img_path))
+                img = Image.open(img_path).convert('RGB')
+                img = transforms.ToTensor()(img)
             if self.truncate and self.truncate != (0, 0):
                 if not (img.size(1) <= self.truncate[0]
                         and img.size(2) <= self.truncate[1]):

onmt/tests/test_beam_search.py

@@ -61,21 +61,18 @@ def test_advance_with_all_repeats_gets_blocked(self):
                     # (but it's still the best score, thus we have
                     # [BLOCKED_SCORE, -inf, -inf, -inf, -inf]
                     expected_scores = torch.tensor(
-                        [0] + [-float('inf')] * (beam_sz - 1))\
-                        .repeat(batch_sz, 1)
-                    expected_scores[:, 0] = self.BLOCKED_SCORE
+                        [self.BLOCKED_SCORE] + [-float('inf')] * (beam_sz - 1)
+                    ).repeat(batch_sz, 1)
                     self.assertTrue(beam.topk_log_probs.equal(expected_scores))
                 else:
                     # repetitions keeps maximizing score
                     # index 0 has been blocked, so repeating=>+0.0 score
                     # other indexes are -inf so repeating=>BLOCKED_SCORE
                     # which is higher
                     expected_scores = torch.tensor(
-                        [0] + [-float('inf')] * (beam_sz - 1))\
-                        .repeat(batch_sz, 1)
-                    expected_scores[:, :] = self.BLOCKED_SCORE
-                    expected_scores = torch.tensor(
-                        self.BLOCKED_SCORE).repeat(batch_sz, beam_sz)
+                        [self.BLOCKED_SCORE] + [-float('inf')] * (beam_sz - 1)
+                    ).repeat(batch_sz, 1)
+                    self.assertTrue(beam.topk_log_probs.equal(expected_scores))
 
     def test_advance_with_some_repeats_gets_blocked(self):
         # beam 0 and beam >=2 will repeat (beam >= 2 repeat dummy scores)
@@ -137,7 +134,8 @@ def test_advance_with_some_repeats_gets_blocked(self):
 
                     expected = torch.full([batch_sz, beam_sz], float("-inf"))
                     expected[:, 0] = no_repeat_score
-                    expected[:, 1:] = self.BLOCKED_SCORE
+                    expected[:, 1:3] = self.BLOCKED_SCORE
+                    expected[:, 3:] = float("-inf")
                     self.assertTrue(
                         beam.topk_log_probs.equal(expected))
 

onmt/trainer.py

@@ -204,7 +204,7 @@ def _update_average(self, step):
             self.moving_average = copy_params
         else:
             average_decay = max(self.average_decay,
-                                1 - (step + 1)/(step + 10))
+                                1 - (step + 1) / (step + 10))
             for (i, avg), cpt in zip(enumerate(self.moving_average),
                                      self.model.parameters()):
                 self.moving_average[i] = \
@@ -306,10 +306,9 @@ def train(self,
                         break
 
             if (self.model_saver is not None
-                and (save_checkpoint_steps != 0
-                     and step % save_checkpoint_steps == 0)):
-                self.model_saver.save(step, is_best,
-                                      moving_average=self.moving_average)
+                    and (save_checkpoint_steps != 0
+                         and step % save_checkpoint_steps == 0)):
+                self.model_saver.save(step, moving_average=self.moving_average)
 
             if train_steps > 0 and step >= train_steps:
                 break
@@ -344,7 +343,7 @@ def validate(self, valid_iter, moving_average=None):
 
             for batch in valid_iter:
                 src, src_lengths = batch.src if isinstance(batch.src, tuple) \
-                                   else (batch.src, None)
+                    else (batch.src, None)
                 tgt = batch.tgt
 
                 with torch.cuda.amp.autocast(enabled=self.optim.amp):
@@ -390,7 +389,7 @@ def _gradient_accumulation(self, true_batches, normalization, total_stats,
             tgt_outer = batch.tgt
 
             bptt = False
-            for j in range(0, target_size-1, trunc_size):
+            for j in range(0, target_size - 1, trunc_size):
                 # 1. Create truncated target.
                 tgt = tgt_outer[j: j + trunc_size]
 
@@ -488,7 +487,12 @@ def _maybe_report_training(self, step, num_steps, learning_rate,
         """
         if self.report_manager is not None:
             return self.report_manager.report_training(
-                step, num_steps, learning_rate, report_stats,
+                step,
+                num_steps,
+                learning_rate,
+                None if self.earlystopper is None
+                else self.earlystopper.current_tolerance,
+                report_stats,
                 multigpu=self.n_gpu > 1)
 
     def _report_step(self, learning_rate, step, train_stats=None,
@@ -499,7 +503,10 @@ def _report_step(self, learning_rate, step, train_stats=None,
         """
         if self.report_manager is not None:
             return self.report_manager.report_step(
-                learning_rate, step, train_stats=train_stats,
+                learning_rate,
+                None if self.earlystopper is None
+                else self.earlystopper.current_tolerance,
+                step, train_stats=train_stats,
                 valid_stats=valid_stats)
 
     def maybe_noise_source(self, batch):

onmt/translate/decode_strategy.py

@@ -1,4 +1,5 @@
 import torch
+from copy import deepcopy
 
 
 class DecodeStrategy(object):
@@ -184,7 +185,7 @@ def maybe_update_forbidden_tokens(self):
             # Reordering forbidden_tokens following beam selection
             # We rebuild a dict to ensure we get the value and not the pointer
             forbidden_tokens.append(
-                dict(self.forbidden_tokens[path_idx]))
+                deepcopy(self.forbidden_tokens[path_idx]))
 
             # Grabing the newly selected tokens and associated ngram
             current_ngram = tuple(seq[-n:].tolist())

onmt/utils/report_manager.py

@@ -49,7 +49,7 @@ def start(self):
     def log(self, *args, **kwargs):
         logger.info(*args, **kwargs)
 
-    def report_training(self, step, num_steps, learning_rate,
+    def report_training(self, step, num_steps, learning_rate, patience,
                         report_stats, multigpu=False):
         """
         This is the user-defined batch-level traing progress
@@ -72,7 +72,7 @@ def report_training(self, step, num_steps, learning_rate,
                 report_stats = \
                     onmt.utils.Statistics.all_gather_stats(report_stats)
             self._report_training(
-                step, num_steps, learning_rate, report_stats)
+                step, num_steps, learning_rate, patience, report_stats)
             return onmt.utils.Statistics()
         else:
             return report_stats
@@ -81,17 +81,22 @@ def _report_training(self, *args, **kwargs):
         """ To be overridden """
         raise NotImplementedError()
 
-    def report_step(self, lr, step, train_stats=None, valid_stats=None):
+    def report_step(self, lr, patience, step, train_stats=None,
+                    valid_stats=None):
         """
         Report stats of a step
 
         Args:
+            lr(float): current learning rate
+            patience(int): current patience
+            step(int): current step
             train_stats(Statistics): training stats
             valid_stats(Statistics): validation stats
-            lr(float): current learning rate
         """
         self._report_step(
-            lr, step, train_stats=train_stats, valid_stats=valid_stats)
+            lr, patience, step,
+            train_stats=train_stats,
+            valid_stats=valid_stats)
 
     def _report_step(self, *args, **kwargs):
         raise NotImplementedError()
@@ -111,12 +116,13 @@ def __init__(self, report_every, start_time=-1., tensorboard_writer=None):
         super(ReportMgr, self).__init__(report_every, start_time)
         self.tensorboard_writer = tensorboard_writer
 
-    def maybe_log_tensorboard(self, stats, prefix, learning_rate, step):
+    def maybe_log_tensorboard(self, stats, prefix, learning_rate,
+                              patience, step):
         if self.tensorboard_writer is not None:
             stats.log_tensorboard(
-                prefix, self.tensorboard_writer, learning_rate, step)
+                prefix, self.tensorboard_writer, learning_rate, patience, step)
 
-    def _report_training(self, step, num_steps, learning_rate,
+    def _report_training(self, step, num_steps, learning_rate, patience,
                          report_stats):
         """
         See base class method `ReportMgrBase.report_training`.
@@ -127,12 +133,15 @@ def _report_training(self, step, num_steps, learning_rate,
         self.maybe_log_tensorboard(report_stats,
                                    "progress",
                                    learning_rate,
+                                   patience,
                                    step)
         report_stats = onmt.utils.Statistics()
 
         return report_stats
 
-    def _report_step(self, lr, step, train_stats=None, valid_stats=None):
+    def _report_step(self, lr, patience, step,
+                     train_stats=None,
+                     valid_stats=None):
         """
         See base class method `ReportMgrBase.report_step`.
         """
@@ -143,6 +152,7 @@ def _report_step(self, lr, step, train_stats=None, valid_stats=None):
             self.maybe_log_tensorboard(train_stats,
                                        "train",
                                        lr,
+                                       patience,
                                        step)
 
         if valid_stats is not None:
@@ -152,4 +162,5 @@ def _report_step(self, lr, step, train_stats=None, valid_stats=None):
             self.maybe_log_tensorboard(valid_stats,
                                        "valid",
                                        lr,
+                                       patience,
                                        step)

onmt/utils/statistics.py

@@ -126,11 +126,13 @@ def output(self, step, num_steps, learning_rate, start):
                time.time() - start))
         sys.stdout.flush()
 
-    def log_tensorboard(self, prefix, writer, learning_rate, step):
+    def log_tensorboard(self, prefix, writer, learning_rate, patience, step):
         """ display statistics to tensorboard """
         t = self.elapsed_time()
         writer.add_scalar(prefix + "/xent", self.xent(), step)
         writer.add_scalar(prefix + "/ppl", self.ppl(), step)
         writer.add_scalar(prefix + "/accuracy", self.accuracy(), step)
         writer.add_scalar(prefix + "/tgtper", self.n_words / t, step)
         writer.add_scalar(prefix + "/lr", learning_rate, step)
+        if patience is not None:
+            writer.add_scalar(prefix + "/patience", patience, step)