do classify_inference by infer_program

fix #207

ERNIE/README.md

@@ -316,4 +316,4 @@ python -u predict_classifier.py \
 
 实际使用时，需要通过 `init_checkpoint` 指定预测用的模型，通过 `predict_set` 指定待预测的数据文件，通过 `num_labels` 配置分类的类别数目;
 
-**Note**: predict_set 的数据格式与 dev_set 和 test_set 的数据格式完全一致，是由 text_a、text_b(可选) 、label 组成的2列/3列 tsv 文件，predict_set 中的 label 列起到占位符的作用，全部置 0 即可;
+**Note**: predict_set 的数据格式是由 text_a、text_b(可选) 组成的1列/2列 tsv 文件;

ERNIE/finetune/classifier.py

@@ -65,7 +65,7 @@ def create_model(args, pyreader_name, ernie_config, is_prediction=False):
     if is_prediction:
         probs = fluid.layers.softmax(logits)
         feed_targets_name = [
-            src_ids.name, pos_ids.name, sent_ids.name, input_mask.name
+            src_ids.name, sent_ids.name, pos_ids.name, input_mask.name
         ]
         return pyreader, probs, feed_targets_name
 

ERNIE/predict_classifier.py

@@ -37,6 +37,7 @@ parser = argparse.ArgumentParser(__doc__)
 model_g = ArgumentGroup(parser, "model", "options to init, resume and save model.")
 model_g.add_arg("ernie_config_path",            str,  None,  "Path to the json file for bert model config.")
 model_g.add_arg("init_checkpoint",              str,  None,  "Init checkpoint to resume training from.")
+model_g.add_arg("save_inference_model_path",    str,  "inference_model",  "If set, save the inference model to this path.")
 model_g.add_arg("use_fp16",                     bool, False, "Whether to resume parameters from fp16 checkpoint.")
 model_g.add_arg("num_labels",                   int,  2,     "num labels for classify")
 
@@ -65,7 +66,8 @@ def main(args):
         label_map_config=args.label_map_config,
         max_seq_len=args.max_seq_len,
         do_lower_case=args.do_lower_case,
-        in_tokens=False)
+        in_tokens=False,
+        is_inference=True)
 
     predict_prog = fluid.Program()
     predict_startup = fluid.Program()
@@ -95,7 +97,25 @@ def main(args):
     else:
         raise ValueError("args 'init_checkpoint' should be set for prediction!")
 
-    predict_exe = fluid.Executor(place)
+    assert args.save_inference_model_path, "args save_inference_model_path should be set for prediction"
+    _, ckpt_dir = os.path.split(args.init_checkpoint.rstrip('/'))
+    dir_name = ckpt_dir + '_inference_model'
+    model_path = os.path.join(args.save_inference_model_path, dir_name)
+    print("save inference model to %s" % model_path)
+    fluid.io.save_inference_model(
+        model_path,
+        feed_target_names, [probs],
+        exe,
+        main_program=predict_prog)
+
+    print("load inference model from %s" % model_path)
+    infer_program, feed_target_names, probs = fluid.io.load_inference_model(
+            model_path, exe)
+
+    src_ids = feed_target_names[0]
+    sent_ids = feed_target_names[1]
+    pos_ids = feed_target_names[2]
+    input_mask = feed_target_names[3]
 
     predict_data_generator = reader.data_generator(
         input_file=args.predict_set,
@@ -103,25 +123,24 @@ def main(args):
         epoch=1,
         shuffle=False)
 
-    predict_pyreader.decorate_tensor_provider(predict_data_generator)
-
-    predict_pyreader.start()
-    all_results = []
-    time_begin = time.time()
-    while True:
-        try:
-            results = predict_exe.run(program=predict_prog, fetch_list=[probs.name])
-            all_results.extend(results[0])
-        except fluid.core.EOFException:
-            predict_pyreader.reset()
-            break
-    time_end = time.time()
-
-    np.set_printoptions(precision=4, suppress=True)
     print("-------------- prediction results --------------")
-    for index, result in enumerate(all_results):
-        print(str(index) + '\t{}'.format(result))
-
+    np.set_printoptions(precision=4, suppress=True)
+    index = 0
+    for sample in predict_data_generator():
+        src_ids_data = sample[0]
+        sent_ids_data = sample[1]
+        pos_ids_data = sample[2]
+        input_mask_data = sample[3]
+        output = exe.run(
+            infer_program,
+            feed={src_ids: src_ids_data,
+                  sent_ids: sent_ids_data,
+                  pos_ids: pos_ids_data,
+                  input_mask: input_mask_data},
+            fetch_list=probs)
+        for single_result in output[0]:
+            print("example_index:{}\t{}".format(index, single_result))
+            index += 1
 
 if __name__ == '__main__':
     print_arguments(args)

ERNIE/reader/task_reader.py

@@ -28,6 +28,7 @@ class BaseReader(object):
                  max_seq_len=512,
                  do_lower_case=True,
                  in_tokens=False,
+                 is_inference=False,
                  random_seed=None):
         self.max_seq_len = max_seq_len
         self.tokenizer = tokenization.FullTokenizer(
@@ -37,6 +38,7 @@ class BaseReader(object):
         self.cls_id = self.vocab["[CLS]"]
         self.sep_id = self.vocab["[SEP]"]
         self.in_tokens = in_tokens
+        self.is_inference = is_inference
 
         np.random.seed(random_seed)
 
@@ -141,14 +143,22 @@ class BaseReader(object):
         token_ids = tokenizer.convert_tokens_to_ids(tokens)
         position_ids = list(range(len(token_ids)))
 
+        if self.is_inference:
+            Record = namedtuple('Record',
+                                ['token_ids', 'text_type_ids', 'position_ids'])
+            record = Record(
+                token_ids=token_ids,
+                text_type_ids=text_type_ids,
+                position_ids=position_ids)
+        else:
             if self.label_map:
                 label_id = self.label_map[example.label]
             else:
                 label_id = example.label
 
-        Record = namedtuple(
-            'Record',
-            ['token_ids', 'text_type_ids', 'position_ids', 'label_id', 'qid'])
+            Record = namedtuple('Record', [
+                'token_ids', 'text_type_ids', 'position_ids', 'label_id', 'qid'
+            ])
 
             qid = None
             if "qid" in example._fields:
@@ -235,12 +245,16 @@ class ClassifyReader(BaseReader):
         batch_token_ids = [record.token_ids for record in batch_records]
         batch_text_type_ids = [record.text_type_ids for record in batch_records]
         batch_position_ids = [record.position_ids for record in batch_records]
+
+        if not self.is_inference:
             batch_labels = [record.label_id for record in batch_records]
-        batch_labels = np.array(batch_labels).astype("int64").reshape([-1, 1])
+            batch_labels = np.array(batch_labels).astype("int64").reshape(
+                [-1, 1])
 
             if batch_records[0].qid is not None:
                 batch_qids = [record.qid for record in batch_records]
-            batch_qids = np.array(batch_qids).astype("int64").reshape([-1, 1])
+                batch_qids = np.array(batch_qids).astype("int64").reshape(
+                    [-1, 1])
             else:
                 batch_qids = np.array([]).astype("int64").reshape([-1, 1])
 
@@ -254,8 +268,10 @@ class ClassifyReader(BaseReader):
 
         return_list = [
             padded_token_ids, padded_text_type_ids, padded_position_ids,
-            input_mask, batch_labels, batch_qids
+            input_mask
         ]
+        if not self.is_inference:
+            return_list += [batch_labels, batch_qids]
 
         return return_list