diff --git a/python/ELMo/README.md b/python/ELMo/README.md
new file mode 100644
index 0000000000000..bdd97b4a589d9
--- /dev/null
+++ b/python/ELMo/README.md
@@ -0,0 +1,46 @@
+## 基于ELMo的LAC分词预测样例
+
+### 一：准备环境
+
+请您在环境中安装1.7或以上版本的Paddle，具体的安装方式请参照[飞桨官方页面](https://www.paddlepaddle.org.cn/)的指示方式。
+
+### 二：下载模型以及测试数据
+
+
+1) **获取预测模型**
+
+点击[链接](https://paddle-inference-dist.bj.bcebos.com/inference_demo/python/elmo/elmo.tgz)下载模型，如果你想获取更多的**模型训练信息**，请访问[链接](https://github.com/PaddlePaddle/models/tree/release/1.8/PaddleNLP/pretrain_language_models/ELMo)。解压后存储到该工程的根目录。
+
+2) **获取相关数据**
+
+点击[链接](https://paddle-inference-dist.bj.bcebos.com/inference_demo/python/elmo/elmo_data.tgz)下载相关数据，解压后存储到该工程的根目录。
+
+### 三：运行预测
+
+`reader.py` 包含了数据读取等功能。
+`infer.py` 包含了创建predictor，读取输入，预测，获取输出的等功能。
+
+运行：
+```
+python infer.py
+```
+
+分词结果为： 
+
+```
+1 sample's result: <UNK>/n 电脑/vn 对/v-I 胎儿/v-I 影响/vn-B 大/v-I 吗/a
+2 sample's result: 这个/r 跟/p 我们/ns 一直/p 传承/n 《/p 易经/n 》/n 的/u 精神/n 是/v-I 分/v 不/d 开/v 的/u
+3 sample's result: 他们/p 不/r 但/ad 上/v-I 名医/v-I 门诊/n ,/w 还/n 兼/ns-I 作/ns-I 门诊/n 医生/v-I 的/n 顾问/v-I 团/nt
+4 sample's result: 负责/n 外商/v-I 投资/v-I 企业/n 和/v-I 外国/v-I 企业/n 的/u 税务/nr-I 登记/v-I ,/w 纳税/n 申报/vn 和/n 税收/vn 资料/n 的/u 管理/n ,/w 全面/c 掌握/n 税收/vn 信息/n
+5 sample's result: 采用/ns-I 弹性/ns-I 密封/ns-I 结构/n ,/w 实现/n 零/v-B 间隙/v-I
+6 sample's result: 要/r 做/n 好/p 这/n 三/p 件/vn 事/n ,/w 支行/q 从/q 风险/n 管理/p 到/a 市场/q 营销/n 策划/c 都/p 必须/vn 专业/n 到位/vn
+7 sample's result: 那么/nz-B ,/r 请/v-I 你/v-I 一定/nz-B 要/d-I 幸福/ad ./v-I
+8 sample's result: 叉车/ns-I 在/ns-I 企业/n 的/u 物流/n 系统/vn 中/ns-I 扮演/ns-I 着/v-I 非常/q 重要/n 的/u 角色/n ,/w 是/u 物料/vn 搬运/ns-I 设备/n 中/vn 的/u 主力/ns-I 军/v-I
+9 sample's result: 我/r 真/t 的/u 能够/vn 有/ns-I 机会/ns-I 拍摄/v-I 这部/vn 电视/ns-I 剧/v-I 么/vn
+10 sample's result: 这种/r 情况/n 应该/v-I 是/v-I 没/n 有/p 危害/n 的/u
+```
+
+### 相关链接
+- [Paddle Inference使用Quick Start！]()
+- [Paddle Inference Python Api使用]()
+
diff --git a/python/ELMo/infer.py b/python/ELMo/infer.py
new file mode 100644
index 0000000000000..c669c3d427edd
--- /dev/null
+++ b/python/ELMo/infer.py
@@ -0,0 +1,140 @@
+#coding: utf-8
+import numpy as np
+import paddle
+import argparse
+import reader
+import sys
+
+from paddle.fluid.core import AnalysisConfig
+from paddle.fluid.core import create_paddle_predictor
+
+
+def parse_args():
+    """
+    Parsing the input parameters.
+    """
+    parser = argparse.ArgumentParser("Inference for lexical analyzer.")
+    parser.add_argument(
+        "--model_dir",
+        type=str,
+        default="elmo",
+        help="The folder where the test data is located.")
+    parser.add_argument(
+        "--testdata_dir",
+        type=str,
+        default="elmo_data/dev",
+        help="The folder where the test data is located.")
+    parser.add_argument(
+        "--use_gpu",
+        type=int,
+        default=False,
+        help="Whether or not to use GPU. 0-->CPU 1-->GPU")
+    parser.add_argument(
+        "--word_dict_path",
+        type=str,
+        default="elmo_data/vocabulary_min5k.txt",
+        help="The path of the word dictionary.")
+    parser.add_argument(
+        "--label_dict_path",
+        type=str,
+        default="elmo_data/tag.dic",
+        help="The path of the label dictionary.")
+    parser.add_argument(
+        "--word_rep_dict_path",
+        type=str,
+        default="elmo_data/q2b.dic",
+        help="The path of the word replacement Dictionary.")
+
+    args = parser.parse_args()
+    return args
+
+
+def to_lodtensor(data):
+    """
+    Convert data in list into lodtensor.
+    """
+    seq_lens = [len(seq) for seq in data]
+    cur_len = 0
+    lod = [cur_len]
+    for l in seq_lens:
+        cur_len += l
+        lod.append(cur_len)
+    flattened_data = np.concatenate(data, axis=0).astype("int64")
+    flattened_data = flattened_data.reshape([len(flattened_data), 1])
+    return flattened_data, [lod]
+
+
+def create_predictor(args):
+    if args.model_dir is not "":
+        config = AnalysisConfig(args.model_dir)
+    else:
+        config = AnalysisConfig(args.model_file, args.params_file)
+
+    config.switch_use_feed_fetch_ops(False)
+    config.enable_memory_optim()
+    if args.use_gpu:
+        config.enable_use_gpu(1000, 0)
+    else:
+        # If not specific mkldnn, you can set the blas thread.
+        # The thread num should not be greater than the number of cores in the CPU.
+        config.set_cpu_math_library_num_threads(4)
+
+    predictor = create_paddle_predictor(config)
+    return predictor
+
+
+def run(predictor, datas, lods):
+    input_names = predictor.get_input_names()
+    for i, name in enumerate(input_names):
+        input_tensor = predictor.get_input_tensor(name)
+        input_tensor.reshape(datas[i].shape)
+        input_tensor.copy_from_cpu(datas[i].copy())
+        input_tensor.set_lod(lods[i])
+
+    # do the inference
+    predictor.zero_copy_run()
+
+    results = []
+    # get out data from output tensor
+    output_names = predictor.get_output_names()
+    for i, name in enumerate(output_names):
+        output_tensor = predictor.get_output_tensor(name)
+        output_data = output_tensor.copy_to_cpu()
+        results.append(output_data)
+    return results
+
+
+if __name__ == '__main__':
+
+    args = parse_args()
+    word2id_dict = reader.load_reverse_dict(args.word_dict_path)
+    label2id_dict = reader.load_reverse_dict(args.label_dict_path)
+    word_rep_dict = reader.load_dict(args.word_rep_dict_path)
+    word_dict_len = max(map(int, word2id_dict.values())) + 1
+    label_dict_len = max(map(int, label2id_dict.values())) + 1
+
+    pred = create_predictor(args)
+
+    test_data = paddle.batch(
+        reader.file_reader(args.testdata_dir, word2id_dict, label2id_dict,
+                           word_rep_dict),
+        batch_size=1)
+    batch_id = 0
+    id2word = {v: k for k, v in word2id_dict.items()}
+    id2label = {v: k for k, v in label2id_dict.items()}
+    for data in test_data():
+        batch_id += 1
+        word_data, word_lod = to_lodtensor(list(map(lambda x: x[0], data)))
+        target_data, target_lod = to_lodtensor(list(map(lambda x: x[1], data)))
+        result_list = run(pred, [word_data, target_data],
+                          [word_lod, target_lod])
+        number_infer = np.array(result_list[0])
+        number_label = np.array(result_list[1])
+        number_correct = np.array(result_list[2])
+        lac_result = ""
+        for i in range(len(data[0][0])):
+            lac_result += id2word[data[0][0][i]] + '/' + id2label[np.array(
+                result_list[3]).tolist()[i][0]] + " "
+        print("%d sample's result:" % batch_id, lac_result)
+        if batch_id >= 10:
+            exit()
diff --git a/python/ELMo/reader.py b/python/ELMo/reader.py
new file mode 100755
index 0000000000000..73d1130b426be
--- /dev/null
+++ b/python/ELMo/reader.py
@@ -0,0 +1,142 @@
+#   Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#coding: utf-8
+"""
+The file_reader converts raw corpus to input.
+"""
+import os
+import __future__
+import io
+
+
+def file_reader(file_dir,
+                word2id_dict,
+                label2id_dict,
+                word_replace_dict,
+                filename_feature=""):
+    """
+    define the reader to read files in file_dir
+    """
+    word_dict_len = max(map(int, word2id_dict.values())) + 1
+    label_dict_len = max(map(int, label2id_dict.values())) + 1
+
+    def reader():
+        """
+        the data generator
+        """
+        index = 0
+        for root, dirs, files in os.walk(file_dir):
+            for filename in files:
+                for line in io.open(
+                        os.path.join(root, filename), 'r', encoding='utf8'):
+                    index += 1
+                    bad_line = False
+                    line = line.strip("\n")
+                    if len(line) == 0:
+                        continue
+                    seg_tag = line.rfind("\t")
+                    word_part = line[0:seg_tag].strip().split(' ')
+                    label_part = line[seg_tag + 1:]
+                    word_idx = []
+                    words = word_part
+                    for word in words:
+                        if word in word_replace_dict:
+                            word = word_replace_dict[word]
+                        if word in word2id_dict:
+                            word_idx.append(int(word2id_dict[word]))
+                        else:
+                            word_idx.append(int(word2id_dict["<UNK>"]))
+                    target_idx = []
+                    labels = label_part.strip().split(" ")
+                    for label in labels:
+                        if label in label2id_dict:
+                            target_idx.append(int(label2id_dict[label]))
+                        else:
+                            target_idx.append(int(label2id_dict["O"]))
+                    if len(word_idx) != len(target_idx):
+                        print(line)
+                        continue
+                    yield word_idx, target_idx
+
+    return reader
+
+
+def test_reader(file_dir,
+                word2id_dict,
+                label2id_dict,
+                word_replace_dict,
+                filename_feature=""):
+    """
+    define the reader to read test files in file_dir
+    """
+    word_dict_len = max(map(int, word2id_dict.values())) + 1
+    label_dict_len = max(map(int, label2id_dict.values())) + 1
+
+    def reader():
+        """
+        the data generator
+        """
+        index = 0
+        for root, dirs, files in os.walk(file_dir):
+            for filename in files:
+                if not filename.startswith(filename_feature):
+                    continue
+                for line in io.open(
+                        os.path.join(root, filename), 'r', encoding='utf8'):
+                    index += 1
+                    bad_line = False
+                    line = line.strip("\n")
+                    if len(line) == 0:
+                        continue
+                    seg_tag = line.rfind("\t")
+                    if seg_tag == -1:
+                        seg_tag = len(line)
+                    word_part = line[0:seg_tag]
+                    label_part = line[seg_tag + 1:]
+                    word_idx = []
+                    words = word_part
+                    for word in words:
+                        if ord(word) < 0x20:
+                            word = ' '
+                        if word in word_replace_dict:
+                            word = word_replace_dict[word]
+                        if word in word2id_dict:
+                            word_idx.append(int(word2id_dict[word]))
+                        else:
+                            word_idx.append(int(word2id_dict["OOV"]))
+                    yield word_idx, words
+
+    return reader
+
+
+def load_reverse_dict(dict_path):
+    """
+    Load a dict. The first column is the key and the second column is the value.
+    """
+    result_dict = {}
+    for idx, line in enumerate(io.open(dict_path, "r", encoding='utf8')):
+        terms = line.strip("\n")
+        result_dict[terms] = idx
+    return result_dict
+
+
+def load_dict(dict_path):
+    """
+    Load a dict. The first column is the value and the second column is the key.
+    """
+    result_dict = {}
+    for idx, line in enumerate(io.open(dict_path, "r", encoding='utf8')):
+        terms = line.strip("\n")
+        result_dict[idx] = terms
+    return result_dict
diff --git a/python/yolov3/infer_yolov3.py b/python/yolov3/infer_yolov3.py
index cdf1cbb1e9896..d9816f79accf0 100644
--- a/python/yolov3/infer_yolov3.py
+++ b/python/yolov3/infer_yolov3.py
@@ -19,9 +19,9 @@ def create_predictor(args):
    if args.use_gpu:
      config.enable_use_gpu(1000, 0)
    else:
-	 # If not specific mkldnn, you can set the blas thread.
-	 # The thread num should not be greater than the number of cores in the CPU.
-	 config.set_cpu_math_library_num_threads(4)
+     # If not specific mkldnn, you can set the blas thread.
+     # The thread num should not be greater than the number of cores in the CPU.
+     config.set_cpu_math_library_num_threads(4)
      #config.enable_mkldnn()
 
    predictor = create_paddle_predictor(config)