diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index edec41573b67f50feca52ee017bae2d7fa2b28ac..2d569e26dd3695642d8289a809b31f58fe56390f 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -47,6 +47,9 @@ if (SERVER)
     endif()
 endif()
 
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/gen_version.py
+    ${CMAKE_CURRENT_BINARY_DIR}/gen_version.py)
+
 set (SERVING_CLIENT_CORE ${PADDLE_SERVING_BINARY_DIR}/core/general-client/*.so)
 message("python env: " ${py_env})
 
@@ -54,6 +57,7 @@ if (APP)
 add_custom_command(
         OUTPUT ${PADDLE_SERVING_BINARY_DIR}/.timestamp
         COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/paddle_serving_app/ ${PADDLE_SERVING_BINARY_DIR}/python/
+        COMMAND env ${py_env} ${PYTHON_EXECUTABLE} gen_version.py "app"
         COMMAND env ${py_env} ${PYTHON_EXECUTABLE} setup.py bdist_wheel
         DEPENDS ${SERVING_APP_CORE} general_model_config_py_proto ${PY_FILES})
 add_custom_target(paddle_python ALL DEPENDS ${PADDLE_SERVING_BINARY_DIR}/.timestamp)
@@ -65,6 +69,7 @@ add_custom_command(
 	COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/paddle_serving_client/ ${PADDLE_SERVING_BINARY_DIR}/python/
 	COMMAND ${CMAKE_COMMAND} -E copy ${SERVING_CLIENT_CORE} ${PADDLE_SERVING_BINARY_DIR}/python/paddle_serving_client/serving_client.so
     COMMAND env ${py_env} ${PYTHON_EXECUTABLE} python_tag.py
+    COMMAND env ${py_env} ${PYTHON_EXECUTABLE} gen_version.py "client"
 	COMMAND env ${py_env} ${PYTHON_EXECUTABLE} setup.py bdist_wheel
 	DEPENDS ${SERVING_CLIENT_CORE} sdk_configure_py_proto ${PY_FILES})
 add_custom_target(paddle_python ALL DEPENDS serving_client ${PADDLE_SERVING_BINARY_DIR}/.timestamp)
@@ -75,6 +80,7 @@ if (SERVER)
         add_custom_command(
             OUTPUT ${PADDLE_SERVING_BINARY_DIR}/.timestamp
             COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/paddle_serving_server/ ${PADDLE_SERVING_BINARY_DIR}/python/
+            COMMAND env ${py_env} ${PYTHON_EXECUTABLE} gen_version.py "server"
             COMMAND env ${py_env} ${PYTHON_EXECUTABLE} setup.py bdist_wheel
             DEPENDS ${SERVING_SERVER_CORE} server_config_py_proto ${PY_FILES})
         add_custom_target(paddle_python ALL DEPENDS ${PADDLE_SERVING_BINARY_DIR}/.timestamp)
@@ -83,7 +89,8 @@ if (SERVER)
             OUTPUT ${PADDLE_SERVING_BINARY_DIR}/.timestamp
             COMMAND cp -r
             ${CMAKE_CURRENT_SOURCE_DIR}/paddle_serving_server_gpu/ ${PADDLE_SERVING_BINARY_DIR}/python/
-            COMMAND env ${py_env} ${PYTHON_EXECUTABLE} paddle_serving_server_gpu/gen_cuda_version.py ${CUDA_VERSION_MAJOR}
+            COMMAND env ${py_env} ${PYTHON_EXECUTABLE} gen_version.py
+            "server_gpu" ${CUDA_VERSION_MAJOR}
             COMMAND env ${py_env} ${PYTHON_EXECUTABLE} setup.py bdist_wheel
             DEPENDS ${SERVING_SERVER_CORE} server_config_py_proto ${PY_FILES})
         add_custom_target(paddle_python ALL DEPENDS ${PADDLE_SERVING_BINARY_DIR}/.timestamp)
diff --git a/python/examples/imagenet/benchmark.py b/python/examples/imagenet/benchmark.py
index 0181b873a36c0e65beff1d03f750b5d78c89aa06..12b013bd2554f24430ad1810f971a340c4b6903e 100644
--- a/python/examples/imagenet/benchmark.py
+++ b/python/examples/imagenet/benchmark.py
@@ -90,6 +90,7 @@ def single_func(idx, resource):
                 image = base64.b64encode(
                     open("./image_data/n01440764/" + file_list[i]).read())
             else:
+                image_path = "./image_data/n01440764/" + file_list[i]
                 image = base64.b64encode(open(image_path, "rb").read()).decode(
                     "utf-8")
             req = json.dumps({"feed": [{"image": image}], "fetch": ["score"]})
diff --git a/python/examples/imagenet/resnet50_web_service.py b/python/examples/imagenet/resnet50_web_service.py
index e7d1914973f2aeb58a912f7d85e35f85718d7a9b..a3f4709cc5a999704ccd9a4e52165d32498bc340 100644
--- a/python/examples/imagenet/resnet50_web_service.py
+++ b/python/examples/imagenet/resnet50_web_service.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 import sys
 from paddle_serving_client import Client
-from paddle_serving_app.reader import Sequential, URL2Image, Resize, CenterCrop, RGB2BGR, Transpose, Div, Normalize
+from paddle_serving_app.reader import Sequential, URL2Image, Resize, CenterCrop, RGB2BGR, Transpose, Div, Normalize, Base64ToImage
 
 if len(sys.argv) != 4:
     print("python resnet50_web_service.py model device port")
@@ -30,7 +30,7 @@ else:
 class ImageService(WebService):
     def init_imagenet_setting(self):
         self.seq = Sequential([
-            URL2Image(), Resize(256), CenterCrop(224), RGB2BGR(), Transpose(
+            Base64ToImage(), Resize(256), CenterCrop(224), RGB2BGR(), Transpose(
                 (2, 0, 1)), Div(255), Normalize([0.485, 0.456, 0.406],
                                                 [0.229, 0.224, 0.225], True)
         ])
diff --git a/python/gen_version.py b/python/gen_version.py
new file mode 100644
index 0000000000000000000000000000000000000000..258905f5815f6af01398479732b907c80cb9d739
--- /dev/null
+++ b/python/gen_version.py
@@ -0,0 +1,43 @@
+# Copyright (c) 2020 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 re
+import os
+import subprocess
+
+
+def update_info(file_name, feature, info):
+    new_str = ""
+    with open(file_name, "r") as f:
+        for line in f.readlines():
+            if re.match(feature, line):
+                if isinstance(info, str):
+                    line = feature + " = \"" + info.strip() + "\"\n"
+                else:
+                    line = feature + " = \"" + info.decode('utf-8').strip(
+                    ) + "\"\n"
+            new_str = new_str + line
+
+    with open(file_name, "w") as f:
+        f.write(new_str)
+
+
+if len(sys.argv) > 2:
+    update_info("paddle_serving_server_gpu/version.py", "cuda_version",
+                sys.argv[2])
+
+path = "paddle_serving_" + sys.argv[1]
+commit_id = subprocess.check_output(['git', 'rev-parse', 'HEAD'])
+update_info(path + "/version.py", "commit_id", commit_id)
diff --git a/python/paddle_serving_app/reader/__init__.py b/python/paddle_serving_app/reader/__init__.py
index 93e2cd76102d93f52955060055afda34f9576ed8..e9fd3154cda1873a4907e7372b8ab561f7cd1d66 100644
--- a/python/paddle_serving_app/reader/__init__.py
+++ b/python/paddle_serving_app/reader/__init__.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from .chinese_bert_reader import ChineseBertReader
-from .image_reader import ImageReader, File2Image, URL2Image, Sequential, Normalize
+from .image_reader import ImageReader, File2Image, URL2Image, Sequential, Normalize, Base64ToImage
 from .image_reader import CenterCrop, Resize, Transpose, Div, RGB2BGR, BGR2RGB, ResizeByFactor
 from .image_reader import RCNNPostprocess, SegPostprocess, PadStride
 from .image_reader import DBPostProcess, FilterBoxes, GetRotateCropImage, SortedBoxes
diff --git a/python/paddle_serving_app/version.py b/python/paddle_serving_app/version.py
index 332cba98dd692c4e33da68d4de7763e83e3729b5..554162f4f29a6c28e328c735a71512cd48e59962 100644
--- a/python/paddle_serving_app/version.py
+++ b/python/paddle_serving_app/version.py
@@ -13,3 +13,4 @@
 # limitations under the License.
 """ Paddle Serving App version string """
 serving_app_version = "0.1.2"
+commit_id = ""
diff --git a/python/paddle_serving_client/version.py b/python/paddle_serving_client/version.py
index f7fc14b2a7f0c25b471e8d3bb44e9d6db6839d01..015a73dca73360da228877cf5b41188dd396933c 100644
--- a/python/paddle_serving_client/version.py
+++ b/python/paddle_serving_client/version.py
@@ -15,3 +15,4 @@
 serving_client_version = "0.3.2"
 serving_server_version = "0.3.2"
 module_proto_version = "0.3.2"
+commit_id = ""
diff --git a/python/paddle_serving_server/version.py b/python/paddle_serving_server/version.py
index f7fc14b2a7f0c25b471e8d3bb44e9d6db6839d01..015a73dca73360da228877cf5b41188dd396933c 100644
--- a/python/paddle_serving_server/version.py
+++ b/python/paddle_serving_server/version.py
@@ -15,3 +15,4 @@
 serving_client_version = "0.3.2"
 serving_server_version = "0.3.2"
 module_proto_version = "0.3.2"
+commit_id = ""
diff --git a/python/paddle_serving_server/web_service.py b/python/paddle_serving_server/web_service.py
index b0c1b79bda5041b4eca114d778a23d3a123c226e..f576b49d1e83167ffdd3a73e94395da4ff991d72 100755
--- a/python/paddle_serving_server/web_service.py
+++ b/python/paddle_serving_server/web_service.py
@@ -96,7 +96,7 @@ class WebService(object):
                 feed=request.json["feed"], fetch=fetch, fetch_map=fetch_map)
             result = {"result": result}
         except ValueError as err:
-            result = {"result": err}
+            result = {"result": str(err)}
         return result
 
     def run_rpc_service(self):
diff --git a/python/paddle_serving_server_gpu/gen_cuda_version.py b/python/paddle_serving_server_gpu/gen_cuda_version.py
deleted file mode 100644
index 4a320a0e4dd9f9145a2c7682d5eecb7f582862b5..0000000000000000000000000000000000000000
--- a/python/paddle_serving_server_gpu/gen_cuda_version.py
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright (c) 2020 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 re
-import os
-
-new_str = ""
-with open("paddle_serving_server_gpu/version.py", "r") as f:
-    for line in f.readlines():
-        if re.match("cuda_version", line):
-            line = re.sub(r"\d+", sys.argv[1], line)
-        new_str = new_str + line
-
-with open("paddle_serving_server_gpu/version.py", "w") as f:
-    f.write(new_str)
diff --git a/python/paddle_serving_server_gpu/version.py b/python/paddle_serving_server_gpu/version.py
index 2272c3aa91f999697ea8ef3e2cdb585b01db8bed..3952f6e4058589e45de0618e5fc38e3d0aaf0c52 100644
--- a/python/paddle_serving_server_gpu/version.py
+++ b/python/paddle_serving_server_gpu/version.py
@@ -16,3 +16,4 @@ serving_client_version = "0.3.2"
 serving_server_version = "0.3.2"
 module_proto_version = "0.3.2"
 cuda_version = "9"
+commit_id = ""
diff --git a/python/paddle_serving_server_gpu/web_service.py b/python/paddle_serving_server_gpu/web_service.py
index 5e9fdf4f4fda84dfb7c4f598fae6cf2381c377ca..b9af48b2e706c0896a4860e51a89ba6784945b7a 100644
--- a/python/paddle_serving_server_gpu/web_service.py
+++ b/python/paddle_serving_server_gpu/web_service.py
@@ -151,7 +151,7 @@ class WebService(object):
                 feed=request.json["feed"], fetch=fetch, fetch_map=fetch_map)
             result = {"result": result}
         except ValueError as err:
-            result = {"result": err}
+            result = {"result": str(err)}
         return result
 
     def run_rpc_service(self):