diff --git a/python/examples/faster_rcnn_model/README_CN.md b/python/examples/faster_rcnn_model/README_CN.md
index 7aa4d343f05df92068d36499b48d9aa5ad7b2a2e..a2c3618f071a3650d50c791595bc04ba0c1d378a 100644
--- a/python/examples/faster_rcnn_model/README_CN.md
+++ b/python/examples/faster_rcnn_model/README_CN.md
@@ -12,7 +12,7 @@ wget https://paddle-serving.bj.bcebos.com/pddet_demo/infer_cfg.yml
 ### 启动服务
 ```
 tar xf faster_rcnn_model.tar.gz
-mv faster_rcnn_model/pddet* .
+mv faster_rcnn_model/pddet* ./
 GLOG_v=2 python -m paddle_serving_server_gpu.serve --model pddet_serving_model --port 9494 --gpu_id 0
 ```
 
diff --git a/python/examples/imdb/test_client.py b/python/examples/imdb/test_client.py
index 9de7a45b0646167c43ea7d3b98b0f3782112f6f0..fdc3ced25377487a2844d57c4e6121801e9fa7fa 100644
--- a/python/examples/imdb/test_client.py
+++ b/python/examples/imdb/test_client.py
@@ -31,4 +31,4 @@ for line in sys.stdin:
     feed = {"words": word_ids}
     fetch = ["acc", "cost", "prediction"]
     fetch_map = client.predict(feed=feed, fetch=fetch)
-    print("{} {}".format(fetch_map["prediction"][0][1], label[0]))
+    print("{} {}".format(fetch_map["prediction"][0], label[0]))
diff --git a/python/examples/senta/senta_web_service.py b/python/examples/senta/senta_web_service.py
index 9a59d9d030ae55584f1b9939a02c782bae3c5011..0c0205e73cdd26231a94b2f0c9c41da84aaca961 100644
--- a/python/examples/senta/senta_web_service.py
+++ b/python/examples/senta/senta_web_service.py
@@ -39,6 +39,8 @@ class SentaService(WebService):
         self.show = show
 
     def start_lac_service(self):
+        if not os.path.exists('./lac_serving'):
+            os.mkdir("./lac_serving")
         os.chdir('./lac_serving')
         self.lac_port = self.port + 100
         r = os.popen(