diff --git a/python/examples/pipeline/ocr/benchmark.py b/python/examples/pipeline/ocr/benchmark.py
index af1caae42a37866f889317c39c6d0b20cb9c9747..fbe0397e046645bbb3251a9f9a404acdc57da34b 100644
--- a/python/examples/pipeline/ocr/benchmark.py
+++ b/python/examples/pipeline/ocr/benchmark.py
@@ -1,3 +1,17 @@
+# Copyright (c) 2021 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.
+
 import sys
 import os
 import base64
@@ -12,6 +26,8 @@ except ImportError:
 import numpy as np
 from paddle_serving_client.utils import MultiThreadRunner
 from paddle_serving_client.utils import benchmark_args, show_latency
+
+
 def parse_benchmark(filein, fileout):
     with open(filein, "r") as fin:
         res = yaml.load(fin)
@@ -24,6 +40,7 @@ def parse_benchmark(filein, fileout):
     with open(fileout, "w") as fout:
         yaml.dump(res, fout, default_flow_style=False)
 
+
 def gen_yml(device):
     fin = open("config.yml", "r")
     config = yaml.load(fin)
@@ -33,19 +50,23 @@ def gen_yml(device):
         config["op"]["det"]["local_service_conf"]["device_type"] = 1
         config["op"]["det"]["local_service_conf"]["devices"] = "2"
         config["op"]["rec"]["local_service_conf"]["device_type"] = 1
-        config["op"]["rec"]["local_service_conf"]["devices"] = "2"        
-    with open("config2.yml", "w") as fout: 
+        config["op"]["rec"]["local_service_conf"]["devices"] = "2"
+    with open("config2.yml", "w") as fout:
         yaml.dump(config, fout, default_flow_style=False)
 
+
 def cv2_to_base64(image):
     return base64.b64encode(image).decode('utf8')
 
+
 def run_http(idx, batch_size):
     print("start thread ({})".format(idx))
-    url = "http://127.0.0.1:9999/ocr/prediction"    
+    url = "http://127.0.0.1:9999/ocr/prediction"
     start = time.time()
-
     test_img_dir = "imgs/"
+    #test_img_dir = "rctw_test/images/"
+    latency_list = []
+    total_number = 0
     for img_file in os.listdir(test_img_dir):
         with open(os.path.join(test_img_dir, img_file), 'rb') as file:
             image_data1 = file.read()
@@ -56,15 +77,20 @@ def run_http(idx, batch_size):
         end = time.time()
     return [[end - start]]
 
+
 def multithread_http(thread, batch_size):
     multi_thread_runner = MultiThreadRunner()
-    result = multi_thread_runner.run(run_http , thread, batch_size)
+    result = multi_thread_runner.run(run_http, thread, batch_size)
+
 
 def run_rpc(thread, batch_size):
     client = PipelineClient()
     client.connect(['127.0.0.1:18090'])
     start = time.time()
     test_img_dir = "imgs/"
+    #test_img_dir = "rctw_test/images/"
+    latency_list = []
+    total_number = 0
     for img_file in os.listdir(test_img_dir):
         with open(os.path.join(test_img_dir, img_file), 'rb') as file:
             image_data = file.read()
@@ -78,16 +104,17 @@ def run_rpc(thread, batch_size):
 
 def multithread_rpc(thraed, batch_size):
     multi_thread_runner = MultiThreadRunner()
-    result = multi_thread_runner.run(run_rpc , thread, batch_size)
+    result = multi_thread_runner.run(run_rpc, thread, batch_size)
+
 
 if __name__ == "__main__":
     if sys.argv[1] == "yaml":
-        mode = sys.argv[2] # brpc/  local predictor
+        mode = sys.argv[2]  # brpc/  local predictor
         thread = int(sys.argv[3])
         device = sys.argv[4]
         gen_yml(device)
     elif sys.argv[1] == "run":
-        mode = sys.argv[2] # http/ rpc
+        mode = sys.argv[2]  # http/ rpc
         thread = int(sys.argv[3])
         batch_size = int(sys.argv[4])
         if mode == "http":
@@ -98,4 +125,3 @@ if __name__ == "__main__":
         filein = sys.argv[2]
         fileout = sys.argv[3]
         parse_benchmark(filein, fileout)
-