WIP

run_classifier_pytorch.py

@@ -115,7 +115,11 @@ parser.add_argument("--iterations_per_loop",
                     default = 1000,
                     type = int,
                     help = "How many steps to make in each estimator call.")
-                    
+ 
+parser.add_argument("--use_gpu",
+                    default = True,
+                    type = bool,
+                    help = "Whether to use GPU")                    
 ### BEGIN - TO DELETE EVENTUALLY --> NO SENSE IN PYTORCH ###                   
 parser.add_argument("--use_tpu",
                     default = False,
@@ -416,25 +420,18 @@ def input_fn_builder(features, seq_length, is_training, drop_remainder):
         batch_size = params["batch_size"]
 
         num_examples = len(features)
-
-        # This is for demo purposes and does NOT scale to large data sets. We do
-        # not use Dataset.from_generator() because that uses tf.py_func which is
-        # not TPU compatible. The right way to load data is with TFRecordReader.
-        d = tf.data.Dataset.from_tensor_slices({
-                "input_ids":
-                        torch.Tensor(all_input_ids, size=[num_examples, seq_length],
-                                    dtype=torch.int32, requires_grad=False),
-                "input_mask":
-                        torch.Tensor(all_input_mask, size=[num_examples, seq_length],
-                                    dtype=torch.int32, requires_grad=False),
-                "segment_ids":
-                        torch.Tensor(all_segment_ids, size=[num_examples, seq_length],
-                                    dtype=torch.int32, requires_grad=False),
-                "label_ids":
-                        torch.Tensor(all_label_ids, size=[num_examples], 
-                                    dtype=torch.int32, requires_grad=False)
-        })
-
+        
+        device = torch.device("cuda") if args.use_gpu else torch.device("cpu")
+        d = {"input_ids":
+                        torch.IntTensor(all_input_ids, device = device), #Requires_grad=False by default
+            "input_mask":
+                        torch.IntTensor(all_input_mask, device = device),
+            "segment_ids":
+                        torch.IntTensor(all_segment_ids, device = device),
+            "label_ids":
+                        torch.IntTensor(all_label_ids, device = device)
+            }
+                        
         if is_training:
             d = d.repeat()
             d = d.shuffle(buffer_size=100)
@@ -443,3 +440,136 @@ def input_fn_builder(features, seq_length, is_training, drop_remainder):
         return d
 
     return input_fn
+
+
+def main(_):
+    processors = {
+        "cola": ColaProcessor,
+        "mnli": MnliProcessor,
+        "mrpc": MrpcProcessor,
+    }
+    
+    if not args.do_train and not args.do_eval:
+        raise ValueError("At least one of `do_train` or `do_eval` must be True.")
+        
+    bert_config = modeling.BertConfig.from_json_file(args.bert_config_file)
+    
+    if args.max_seq_length > bert_config.max_position_embeddings:
+        raise ValueError(
+            "Cannot use sequence length %d because the BERT model "
+            "was only trained up to sequence length %d" %
+            (args.max_seq_length, bert_config.max_position_embeddings))
+    
+    if os.path.exists(args.output_dir) and os.listdir(args.output_dir):
+                    raise ConfigurationError(f"Output directory ({args.output_dir}) already exists and is "
+                                     f"not empty.")
+    os.makedirs(args.output_dir, exist_ok=True)
+
+    task_name = args.task_name.lower()
+    
+    if task_name not in processors:
+        raise ValueError("Task not found: %s" % (task_name))
+
+    processor = processors[task_name]()
+
+    label_list = processor.get_labels()
+
+    tokenizer = tokenization.FullTokenizer(
+        vocab_file=args.vocab_file, do_lower_case=args.do_lower_case)
+        
+    # tpu_cluster_resolver = None
+    # if FLAGS.use_tpu and FLAGS.tpu_name:
+    #     tpu_cluster_resolver = tf.contrib.cluster_resolver.TPUClusterResolver(
+    #         FLAGS.tpu_name, zone=FLAGS.tpu_zone, project=FLAGS.gcp_project)
+
+    # is_per_host = tf.contrib.tpu.InputPipelineConfig.PER_HOST_V2
+    # run_config = tf.contrib.tpu.RunConfig(
+    #     cluster=tpu_cluster_resolver,
+    #     master=FLAGS.master,
+    #     model_dir=FLAGS.output_dir,
+    #     save_checkpoints_steps=FLAGS.save_checkpoints_steps,
+    #     tpu_config=tf.contrib.tpu.TPUConfig(
+    #         iterations_per_loop=FLAGS.iterations_per_loop,
+    #         num_shards=FLAGS.num_tpu_cores,
+    #         per_host_input_for_training=is_per_host))
+    
+    train_examples = None
+    num_train_steps = None
+    num_warmup_steps = None
+    if args.do_train:
+        train_examples = processor.get_train_examples(args.data_dir)
+        num_train_steps = int(
+            len(train_examples) / args.train_batch_size * args.num_train_epochs)
+        num_warmup_steps = int(num_train_steps * args.warmup_proportion)
+    
+    model_fn = model_fn_builder(
+        bert_config=bert_config,
+        num_labels=len(label_list),
+        init_checkpoint=args.init_checkpoint,
+        learning_rate=args.learning_rate,
+        num_train_steps=num_train_steps,
+        num_warmup_steps=num_warmup_steps,
+        use_gpu=args.use_gpu,
+        use_one_hot_embeddings=args.use_gpu) ### TO DO - to check when model_fn is written)
+    
+    # If TPU is not available, this will fall back to normal Estimator on CPU
+    # or GPU. - TO DO
+    for batch in 
+    estimator = tf.contrib.tpu.TPUEstimator(
+        use_tpu=args.use_tpu,
+        model_fn=model_fn,
+        config=run_config,
+        train_batch_size=args.train_batch_size,
+        eval_batch_size=args.eval_batch_size)
+    
+    if args.do_train:
+        train_features = convert_examples_to_features(
+            train_examples, label_list, args.max_seq_length, tokenizer)
+        logger.info("***** Running training *****")
+        logger.info("  Num examples = %d", len(train_examples))
+        logger.info("  Batch size = %d", args.train_batch_size)
+        logger.info("  Num steps = %d", num_train_steps)
+        train_input_fn = input_fn_builder(
+            features=train_features,
+            seq_length=args.max_seq_length,
+            is_training=True,
+            drop_remainder=True)
+        estimator.train(input_fn=train_input_fn, max_steps=num_train_steps)
+    
+    if args.do_eval:
+        eval_examples = processor.get_dev_examples(args.data_dir)
+        eval_features = convert_examples_to_features(
+            eval_examples, label_list, args.max_seq_length, tokenizer)
+
+        tf.logging.info("***** Running evaluation *****")
+        tf.logging.info("  Num examples = %d", len(eval_examples))
+        tf.logging.info("  Batch size = %d", args.eval_batch_size)
+
+        # This tells the estimator to run through the entire set.
+        eval_steps = None
+        # However, if running eval on the TPU, you will need to specify the
+        # number of steps.
+        if args.use_tpu:
+            # Eval will be slightly WRONG on the TPU because it will truncate
+            # the last batch.
+            eval_steps = int(len(eval_examples) / args.eval_batch_size)
+
+        eval_drop_remainder = True if args.use_tpu else False
+        eval_input_fn = input_fn_builder(
+            features=eval_features,
+            seq_length=args.max_seq_length,
+            is_training=False,
+            drop_remainder=eval_drop_remainder)
+
+        result = estimator.evaluate(input_fn=eval_input_fn, steps=eval_steps)
+
+        output_eval_file = os.path.join(args.output_dir, "eval_results.txt")
+        with tf.gfile.GFile(output_eval_file, "w") as writer:
+            tf.logging.info("***** Eval results *****")
+            for key in sorted(result.keys()):
+                tf.logging.info("  %s = %s", key, str(result[key]))
+                writer.write("%s = %s\n" % (key, str(result[key])))
+    
+if __name__ == "__main__":
+    main()
+    return None
\ No newline at end of file